CN1790082A - Composite lens, lens unit with the composite lens, and camera with the lens unit - Google Patents

Abstract

The invention discloses composite lens, lens unit and with the composite lens and shooting device with the lens unit, which is characterized by the following: the mutual non-optical function face (10,11) of adjacent lens (7,8) touches the optical axial location of adjacent lens (7,8) directly or indirectly through other part; the angle of several lens (7,8) and optical axle is different from each other in the same axle adjustment face (12,13); preceding the same axle adjustment of adjustment component (14).

Description

Compound lens and the lens unit and the camera head that possesses this lens unit that possess this compound lens

Technical field

The lens unit and the camera head that possesses this lens unit that the present invention relates to compound lens and possess this compound lens, especially a plurality of lens are adjacent and put on optical axis direction, simultaneously each lens carried out making the compound lens of optical axis same axial adjustment consistent with each other.

Background technology

All the time, the shooting usefulness camera heads such as video camera in, as shown in figure 22, employing be the lens unit 4 that in lens barrel 3, possesses other opticses such as a plurality of (being 2 among Fig. 2) lens 1,2 and diaphragm.

In the past, when this lens unit 4 of assembling, as shown in figure 22, adopted the method that each optics 1,2 is pressed into successively lens barrel 3 with respect to lens barrel 3 from the optics 1 that becomes rear side sometimes.

But when adopting this method, when being pressed into the 1st optics 1 with respect to lens barrel 3, the side wall portion of lens barrel 3 can expand and make the internal diameter of lens barrel 3 depart from the size of design originally slightly sometimes.

Like this, then the 2nd later optics 2 is not pressed into the institute's allocation in the lens barrel 2, because of the position relation of each optics 1,2 becomes unbalanced, and can produce the shortcoming of the optical characteristics deterioration that makes lens unit 4.

In addition, at the outer peripheral face of lens barrel 3, though be formed with the auxiliary section to the camera head main body such as screw division, as previously mentioned because of being pressed into the words that optics 1 makes that the side wall portion of lens barrel 3 expands, because of the external diameter of lens barrel 3 departs from originally design size, so the size of auxiliary section also can produce deviation.Lens unit 4 is suitably cooperated with the camera head main body, thereby occur as the otiose situation of product.

To this, not that each lens was come folding and unfolding separately in 1,2 minutes in lens barrel 3, but, just can avoid above-mentioned shortcoming effectively to the state of a plurality of lens and the compound lens that as required other optics one combined to come folding and unfolding to arrive in the lens barrel 3.

But, words that each optics is pasted only, owing to can produce as the sort of optical parallax of departing from of the optical axis between each optics, if so adopt the structure that to adjust this error, even for example the performance of each lens is different, also can forms absorption errors and bring into play the compound lens that obtains suitable optical property.

Under such background, up to now, proposed and made the lens optical axis each other or the relevant various schemes of lens of the central shaft of the optical axis of other optics such as the optical axis of lens and diaphragm or lens barrel same axial adjustment consistent with each other.

[patent documentation 1] spy opens the 2001-344806 communique

[patent documentation 2] spy opens the 2002-196211 communique

[patent documentation 3] spy opens the 2002-286987 communique

Yet, originally can not carry out the same axial adjustment of each optics in the stage of compound lens, owing to require great effort very much with axial adjustment, so the problem that can not improve production efficiency of products is arranged.

For example, the such cone portion that makes of lens that the spy opens in the 2002-196211 communique contacts the occasion of carrying out with the lens of axial adjustment, owing to need form each lens with very high dimensional accuracy, so can not enhance productivity.

In addition, it is such that the spy drives the lens of 2002-286987 communique, a plurality of opticses are pressed into successively the occasion of the lens of the same axial adjustment of carrying out each optics in the lens barrel, because of the above-mentioned lens that are pressed into like that, can expect that lens barrel also can be out of shape, the setting of size that need carry out each optics accurately is to guarantee the suitable surplus that is pressed into.Therefore, obviously the manufacturing of lens becomes difficult, can not enhance productivity.

Have, the lens that the spy opens the 2001-344806 communique are photodetector lens, and are different on basic structure with the lens that camera head is used again, and do not make the words of the state of blocking and just can not carry out same axial adjustment.Have again,, make with axial adjustment and become complicated owing to the location that can not carry out uniquely at optical axis direction.

Have again, in being pressed into lens barrel, carry out occasion afterwards, carry out when the inspection of optical property also can only finish in the assembling of lens with the lens of axial adjustment.As a result, owing to can not enhance productivity, assembly failure causes investigation also to become difficult, so be difficult to further enhance productivity.

Like this, originally, actual conditions are not propose any effective scheme to keeping the compound lens that high optical property enhances productivity simultaneously.

Summary of the invention

To this, the present invention is the invention that puts forward in view of above each point, its objective is to provide by the same axial adjustment of can be simply in the stage of compound lens and suitably carrying out optics just to keep compound lens and lens unit that possesses this compound lens that optical property enhances productivity simultaneously and the camera head that possesses this lens unit.

In order to achieve the above object, the present invention 1 compound lens is characterised in that, be that a plurality of lens are adjacent and put on optical axis direction, simultaneously described a plurality of lens have been carried out making the compound lens of optical axis same axial adjustment consistent with each other, described a plurality of lens, its adjacent lenses non-optical function face is each other contacted indirectly by other parts by direct or Jie and locatees at the optical axis direction of this adjacent lens, and, on described a plurality of lens, form with the optical axis angulation and have nothing in common with each other each other and be used for the adjustment face of this adjacent lenses same axial adjustment each other in adjacent lenses, have again, carry out described same axial adjustment by the adjustment component that cooperates with described adjacent lenses both sides' adjustment face.

Therefore, adopt the words of the present invention 1 invention, by positioning at the optical axis direction of lens uniquely adjustment component is cooperated with adjustment face, the stage that just can be implemented in compound lens simply and is suitably carried out the same axial adjustment ground compound lens of optics.

Also have, can adopt traditional statistical method lens are carried out lens such as forming mould the regulation of creating conditions during the bias of intrinsic optical axis, after the bias of the optical axis of once having stipulated these lens under creating conditions with adjustment component, in the manufacturing afterwards, by in advance lens being implemented to be used to fill up the thickening processing of bias, just can carry out same axial adjustment uniquely by institute's allocation that adjustment component only is positioned between adjustment face.Have, this unique same axial adjustment can be by forming the position of filling up bias or also can realize by the isolated body that separates with lens of filling up bias in the configuration of adjustment face in adjustment component self in advance again.

Also have, in the time can stipulating the bias of intrinsic optical axis to creating conditions of described lens, be meant each lens that constitutes compound lens respectively in the occasion of certain specific creating conditions (mould etc.) compacted under, when each lens is made compound lens, can regard as and take place and the described specific corresponding unique bias (following identical) of creating conditions.

The compound lens of invention 2 is characterised in that, the outside of the optical function face of lens among described adjacent lenses, when being formed with the extension that another lens side among the described adjacent lenses of optical axis direction extends, be formed with the adjustment face of described lens at the inner peripheral surface of this extension, at least a portion of the outer peripheral face of described another lens is positioned at the inboard of described extension, the position of inboard that is positioned at the described at least extension of this outer peripheral face is formed with the adjustment face of described another lens, and described adjustment component is between the adjustment face of the adjustment face of described lens and described another lens.

Therefore, adopt the invention of this invention 2, diminish because of making, so can realize the structure of miniaturization more in the cross section of the circumferencial direction quadrature of adjustment component.

The compound lens of invention 3 is characterised in that, in invention 1, the outside of the optical function face of lens among described adjacent lenses, in the time of a plurality of extension that along the circumferential direction spaced apart another lens side that is formed with among the described adjacent lenses of optical axis direction is extended, be formed with the adjustment face of described lens at the outer peripheral face of these extensions, when the outside of the optical function face of described another lens is formed with a plurality of flange parts between each extension at described lens, be formed with the adjustment face of described another lens at the outer peripheral face of these flange parts, described adjustment component is entrenched in the periphery of the adjustment face of the adjustment face of described lens and described another lens.

Therefore, adopt the invention of invention 3, because of the stress that can utilize adjustment component to make to act on the lens keeps even, so can carry out more stable same axial adjustment.

Invention 4 compound lens is characterised in that, to any one of invention 3, described adjustment component is made the annular element that contacts with described adjacent lenses both sides' adjustment face in invention 1.

Therefore, adopt the invention of invention 4, owing to can suitably carry out the same axial adjustment of optics, so can utilize simple structure to come easier and carry out same axial adjustment at an easy rate by the degree of tilt of adjusting annular element.

The compound lens of invention 5 is characterised in that in invention 1 to 3, described adjustment component is made the sleeve that contacts with described adjacent lenses both sides' adjustment face.

Therefore, adopt the invention of invention 5, owing to can suitably carry out the same axial adjustment of optics, so can utilize simple structure to come easier and carry out same axial adjustment at an easy rate by the degree of tilt of adjusting sleeve.

The compound lens of invention 6 is characterised in that in invention 4, described adjustment component has the protuberance with light shaft positive cross, and this protuberance contacts with the position of facing the described adjustment component on the non-optical function face of lens.

Therefore, adopt the words of the invention of invention 6, in the time can stipulating the bias of intrinsic optical axis to creating conditions of lens, once stipulated the bias of optical axis of these lens under creating conditions with adjustment component (parts that do not have protuberance) after, in the manufacturing afterwards, can be only carry out same axial adjustment uniquely by institute's allocation that the adjustment component that is formed with the described protuberance that is used to fill up bias is positioned between adjustment face.As a result, can further improve the manufacturing efficient of compound lens.

Invention 7 compound lens is characterised in that, in any one, its flat shape of described adjustment component is for to have the shape of peristome in the part of annular in invention 4 to 6.

Therefore, adopt the words of the present invention 7 invention, with do not have the occasion of peristome in adjustment component and compare, when carrying out the adjustment of adjustment component, since be easy to make adjustment component along the shape of the face of adjustment only with the quantitative elasticity small deformation of institute, so can carry out the same axial adjustment of optics with higher precision.

The compound lens of invention 8 is characterised in that, be that a plurality of lens are adjacent and put on optical axis direction, simultaneously described a plurality of lens have been carried out making the compound lens of optical axis same axial adjustment consistent with each other, described a plurality of lens, its adjacent lenses non-optical function face is each other contacted indirectly by other parts by direct or Jie and locatees at the optical axis direction of this adjacent lens, and, on described a plurality of lens, form with the optical axis angulation and have nothing in common with each other each other and be used for the adjustment face of this adjacent lenses same axial adjustment each other in adjacent lenses.

Therefore, adopt the words of the invention of invention 8, by carrying out in the location of the optical axis direction of lens, adjustment component being cooperated with adjustment face uniquely, just can be implemented in the compound lens that stage of compound lens is easy and suitably carry out the same axial adjustment of optics.

Also have, in the time can adopting traditional statistical method lens to be carried out the bias of the intrinsic optical axis of regulation of creating conditions of lens such as forming mould, after the bias of the optical axis of once having stipulated these lens under creating conditions with adjustment component, in the manufacturing afterwards, by in advance lens being implemented to be used to fill up the thickening processing of bias, simultaneously be pre-formed the position of filling up bias in adjustment component self, the isolated body that separates with lens of filling up bias in adjustment face configuration just can be only by making adjustment component carry out same axial adjustment uniquely at the institute's allocation between the adjustment face.Like this, just can further improve the manufacturing efficient of lens.

In addition, after each optics bonding, make adjustment component from breaking away between the adjustment face, perhaps, adjustment component is finally only used when the bias of regulation optical axis, in the actual production stage, by in that other parts fill up bias etc. are set between the adjustment face, just can make the compound lens that does not have adjustment component at the resultant articles state.

The compound lens of invention 9 is characterised in that, be that a plurality of lens are adjacent and put on optical axis direction, simultaneously described a plurality of lens have been carried out making the compound lens of optical axis same axial adjustment consistent with each other, described a plurality of lens, its adjacent lenses non-optical function face is each other contacted indirectly by other parts by direct or Jie and locatees at the optical axis direction of this adjacent lens, and, on described a plurality of lens, form with the optical axis angulation and have nothing in common with each other each other and be used for the adjustment face of this adjacent lenses same axial adjustment each other in adjacent lenses, have, the sleeve that cooperates by the adjustment face with described lens both sides carries out described same axial adjustment again.

Therefore, adopt the invention of invention 9,, sleeve is cooperated with adjustment face, just can be implemented in the compound lens stage simply and the compound lens that suitably carries out the same axial adjustment of optics by carrying out uniquely in the location of the optical axis direction of lens.

The lens unit of invention 10 is characterised in that invention 1 to 9 described compound lens is installed in the lens barrel.

Therefore, adopt the words of the invention of invention 10, by carrying out uniquely in the location of the optical axis direction of lens, sleeve is cooperated with adjustment face, just can realize possessing the compound lens stage simply and the lens unit of compound lens that suitably carries out the same axial adjustment of optics.

Invention 11 lens unit is characterised in that, in the compound lens only one piece of lens be pressed in the lens barrel.

Therefore, adopt this structure, can realize the identical easier lens unit in the position of lens barrel.

The camera head of invention 12 is characterised in that to possess invention 10 or invent 11 described lens units.

Therefore, adopt this structure, the compound lens of enhancing productivity when can realize to keep optical property.

Adopt the compound lens of invention 1, the compound lens of enhancing productivity when can realize keeping optical property.

Adopt the compound lens of invention 2, remove the effect of inventing 1 compound lens the compound lens of enhancing productivity when can also realize keeping the good optical performance.

Adopt the compound lens of invention 3, remove the effect of inventing 1 compound lens, can also realize more small-sized and compound lens that can further enhance productivity.

Adopt the compound lens of invention 4, remove invention 1 to the effect of inventing 3 compound lens, can also realize the compound lens that further to enhance productivity more at an easy rate.

Adopt the compound lens of invention 5, remove invention 1 to the effect of inventing 3 compound lens, can also realize the compound lens that further to enhance productivity more at an easy rate.

Adopt the compound lens of invention 6, remove the effect of inventing 4 compound lens, can also realize the compound lens that to enhance productivity.

Adopt the compound lens of invention 7, remove invention 4 to the effect of inventing 6 compound lens, can also realize the compound lens that to enhance productivity.

Adopt the compound lens of invention 8, the compound lens that can enhance productivity when can realize keeping optical property.

Adopt the compound lens of invention 9, the compound lens that can enhance productivity when can realize keeping optical property.

Adopt the lens unit of invention 10, the lens unit that can enhance productivity when can realize keeping optical property.

Adopt the lens unit of invention 11, remove the effect of inventing 10 lens unit, can also realize the lens unit that to enhance productivity.

Adopt the camera head of invention 12, the camera head that can enhance productivity when can realize keeping optical property.

Description of drawings

Fig. 1 is a longitudinal section of showing the 1st embodiment of compound lens of the present invention.

Fig. 2 is the vertical view that is illustrated in the 1st embodiment of compound lens of the present invention as the annular element of adjustment component.

Fig. 3 is the side view of Fig. 2.

Fig. 4 is the longitudinal section that is illustrated in alternate manners different with Fig. 1 in the 1st embodiment of compound lens of the present invention.

Fig. 5 is the longitudinal section that is illustrated in alternate manners different with Fig. 1 and Fig. 4 in the 1st embodiment of compound lens of the present invention.

Fig. 6 is the stereographic map that is illustrated in the alternate manner different with Fig. 2 of annular element in the 1st embodiment of compound lens of the present invention.

Fig. 7 is illustrated in the 1st embodiment of compound lens of the present invention, and the longitudinal section of the engineering of adjustment component and the 1st lens is set on the 2nd lens in the manufacturing engineering of compound lens.

Fig. 8 is illustrated in the 1st embodiment of compound lens of the present invention, the longitudinal section of the same axial adjustment engineering of each lens in the manufacturing engineering of compound lens.

Fig. 9 is illustrated in the 1st embodiment of compound lens of the present invention the stereographic map of having implemented to help the 2nd lens of rib as thickening processing in advance.

Figure 10 is illustrated in the stereographic map of having implemented the 2nd lens of stage portion in the 1st embodiment of compound lens of the present invention as thickening processing in advance.

Figure 11 is illustrated in the stereographic map of having implemented the 1st lens of stage portion in the 1st embodiment of compound lens of the present invention as thickening processing in advance.

Figure 12 is a longitudinal section of showing the 2nd embodiment of compound lens of the present invention.

Figure 13 is the upward view that is illustrated in the 2nd lens in the 2nd embodiment of compound lens of the present invention.

Figure 14 is the vertical view that is illustrated in the 1st lens in the 2nd embodiment of compound lens of the present invention.

Figure 15 is a longitudinal section of showing the 3rd embodiment of compound lens of the present invention.

Figure 16 is a longitudinal section of showing the 1st embodiment of lens unit of the present invention.

Figure 17 is a longitudinal section of showing the 2nd embodiment of lens unit of the present invention.

Figure 18 is a longitudinal section of showing other embodiment of compound lens.

Figure 19 is a longitudinal section of showing the mode of the compound lens that does not have employing among the present invention.

Figure 20 is a longitudinal section of showing alternate manners different with Figure 19 of the compound lens that does not have to adopt among the present invention.

Figure 21 is a longitudinal section of showing other embodiment of compound lens.

Figure 22 is a longitudinal section of showing an example of original compound lens.

Among the figure

6,25, the 37-compound lens, 7,26-the 1st lens, 8,27-the 2nd lens, the 9-optical axis, 10,11,30, the non-optical function face of 33-, 12,13,28,29-adjusts face, the 14-adjustment component, 16-extension, 17-peristome, 19-helps rib, 20-protuberance, 22-stage portion, the 31-extension, 34-flange part, 38-sleeve, 41,46-lens unit, the 42-lens barrel.

Embodiment

Below, the 1st embodiment of compound lens of the present invention is described referring to figs. 1 through Figure 11.

As shown in Figure 1, the compound lens 6 of present embodiment has adjacent in optical axis 9 directions and two pieces of lens 7,8 that put, and the lens that become the thing side are the 1st lens 7, and another lens that become the imaging surface side are the 2nd lens 8.

The 1st lens 7 and the 2nd lens 8 are in contact with one another by the non-optical function face 10,11 with optical axis 9 quadratures and are positioned in optical axis 9 directions.

In addition, on the 1st lens 7 and the 2nd lens 8, be formed with the adjustment face 12,13 of the same axial adjustment that is used for two lens 7,8, these adjustment faces 12,13 and optical axis 9 angulations are promptly with optical axis 9 tangent line and optical axis 9 angulations (following identical) difference at grade, tangent with each adjustment face 12,13.

In the present embodiment, as shown in Figure 1, adjustment face 12 is formed at the vertical plane parallel with optical axis 9, and adjustment face 13 is formed at the cone face that diameter shrinks among Fig. 1 downwards.

Have, the 1st lens 7 and the 2nd lens 8 carry out same axial adjustment by the adjustment component 14 that cooperates with two lens 7,8 both sides' adjustment face 12,13 again.

That is, it is relatively mobile by non-optical function face 10,11 to be situated between by tilt (changing adjustment component 14 and optical axis 9 angulations) adjustment component 14, the 1 lens 7 and the 2nd lens 8, makes the 1st lens 7 consistent with the optical axis of the 2nd lens 8.

Here, the degree of tilt of the amount of movement of lens and adjustment component 14 is roughly proportional.

Therefore, carry out location by being situated between uniquely by non-optical function face 10,11 in optical axis 9 directions of lens 7,8 with optical axis 9 quadratures of two lens 7,8, adjustment component 14 is cooperated with adjustment face 12,13, just can be implemented in the compound lens 6 that stage of compound lens 6 is easy and suitably carry out the same axial adjustment of lens 7,8.Also have, in Fig. 1,, and need not be confined to this, non-optical function face 10,11 is situated between each other by contacting indirectly with other parts (diaphragm etc.) of optical axis 9 quadratures though non-optical function face 10,11 is in direct contact with one another.

In addition, in case change the angle of inclination of adjustment face 12,13, just can change the amount of movement of lens with respect to the inclination of adjustment component 14.

In addition, adjustment face 12,13 be not limited to optical axis 9 at grade with the tangent tangent line of each adjustment face 12,13 and optical axis 9 angulations along optical axis 9 directions always for the occasion of the face of constant angles, also can be the face that the tangent line angulation gradually changes along optical axis 9 directions.Like this, can for example suitably set lens for 2 functions or joint jump relation beyond the shape equal proportion with respect to the addendum modification of adjustment component 14 degree of tilt.

Have, the structure of the compound lens 6 in the present embodiment is that adjustment component 14 contacts with the 1st lens 7 and the 2nd lens 8 both sides' surface of contact 12,13 again.

As Fig. 2 and shown in Figure 3, the cross sectional shape of this adjustment component 14 is round, and flat shape has peristome 17 for the part in annular.

Like this, do not have the occasion of peristome to compare with adjustment component 14 and since when carrying out, be easy to make with axial adjustment adjustment component 14 along the shape of adjustment face 12,13 only elastic deformation institute quantitatively, so can carry out the same axial adjustment of optics 7,8 with higher precision.

In addition, this adjustment component 14 is preferably made with for example rubber-like such as steel wire, copper cash parts.

In addition, owing to just can suitably carry out the same axial adjustment of optics 7,8, so can be with simple structure easier and carry out same axial adjustment at an easy rate by the degree of tilt of adjusting adjustment component 14.

In addition, in the present embodiment, the outside at the optical function face 15 of the 1st lens 7 is formed with in the extended extension 16 of the 2nd lens side along optical axis 9, is formed with the adjustment face 12 of the 1st lens 7 at the inner peripheral surface of this extension 16.

Have, in the inboard of extension 16, at least a portion of the outer peripheral face of the 2nd lens 8 is positioned at herein again, simultaneously, is formed with the adjustment face 13 of the 2nd lens 8 in the position of the inboard of extension 16 at least being positioned at this outer peripheral face.

And adjustment component 14 is between the adjustment face 13 of the adjustment face 12 of the 1st lens 7 and the 2nd lens 8.

Like this, diminish, just can make the external diameter of compound lens littler by making the adjustment component 14 and the cross section of circumferencial direction quadrature.Also have, preferably circular with the cross sectional shape of the circumferencial direction quadrature of adjustment component 14, but as long as cooperate with two adjustment faces, 12,13 both sides, can certainly be other shape.

Also have,, also can make simply and adjustment component 14 and adjustment face 12,13 are bonded together with bonding agent as the method that keeps coaxial state by adjustment component 14.In addition, be not limited to this, for example, as shown in Figure 4, can be on the adjustment face 13 of the 2nd lens 8, as thickening processing, help rib 19 by what be formed on that optical axis direction contacts with adjustment component 14, stably keep also can also using bonding agent with the axial adjustment state.In addition, also can keep the same axial adjustment state of adjustment component 14 by the spacer of configuration on adjustment face 13 and lens 8 annular of separating.

Have again, implement above-mentioned the sort of other significance that adds the thickening processing that helps rib 19 grades and be to realize to carry out uniquely compound lens 6 with axial adjustment.

Promptly, when the bias of the intrinsic optical axis 9 of regulation of creating conditions that can carry out lens 7,8 such as forming mould to lens 7,8 with for example statistical method, with the bias that adjustment component 14 was once being stipulated the optical axis 9 of these lens 7,8 of creating conditions down, just the bias of this regulation intactly can be applied to the compound lens of forming at the 1st lens 7 and the 2nd lens 8 of the identical compacted under of creating conditions 6.

Therefore, after having stipulated bias, not after but in advance lens 7,8 are implemented to be used to fill up the thickening processing of bias with axial adjustment, the spacer of opening in 7,8 minutes with lens by configuration on adjustment face 12,13 of filling up bias, only the institute's allocation between adjustment face 12,13 is provided with adjustment component 14 and just can carries out same axial adjustment uniquely.

Also have, the position that is provided with of adjustment component 14 is that benchmark is determined with peristome 17 privileged sites such as grade of adjustment component 14 for example in this occasion, this becomes the privileged site (during regulation bias) when carrying out with axial adjustment of benchmark, decides also passable by which position that detects the circumferencial direction between the adjustment face of being arranged on 12,13 in advance.In addition, be not limited to this, the privileged sites such as gate part of lens 7,8 are benchmark during with mould molding, become the privileged site setting of benchmark by which position that detects adjustment component 14 in advance with respect to this, determine adjustment component 14 that the position is set is also passable.

Do like this, just can further improve the manufacturing efficient of compound lens 6.

Have again,, the protuberance 20 that position that the adjustment component 14 in the non-optical function face 11 with the 1st lens 7 faces contacts can be set on adjustment component 14 also as Fig. 5, shown in Figure 6.

Do like this, same with the situation that helps rib 19, in the time can stipulating the bias of intrinsic optical axis 9 to creating conditions of lens 7,8, once stipulating the bias of optical axis 9 of these lens 7,8 of creating conditions down with adjustment component 14 (not having protuberance 20) after, in the manufacturing afterwards, only by making the institute allocation of adjustment component 14 between adjustment face 12,13 that is formed with the protuberance 20 that is used to fill up bias just can carry out same axial adjustment uniquely.

Also have, though not shownly go out, but, the protuberance 20 of adjustment component 14 towards also can be opposite with direction shown in Figure 5.This occasion also can contact the bias of filling up optical axis by the position of the adjustment component 14 in making protuberance 20 and facing the non-optical function face 11 of the 2nd lens 8, with shown in Figure 5 same, can carry out same axial adjustment uniquely.

In addition, behind bonding each optics 7,8, make adjustment component 14 from breaking away between the adjustment face 12,13, perhaps, adjustment component 14 is finally only used when the bias of regulation optical axis 9, in the batch process stage of reality,, just can make the compound lens that does not possess adjustment component 14 in the resultant articles stage between adjustment face 12,13 by other parts of filling up bias are set.

Secondly, the manufacture method to the compound lens 6 of present embodiment describes.

At first, as shown in Figure 7, the 2nd lens 8 so that its adjustment face 13 is fixed at the state of upside, simultaneously, on the 2nd lens 8, are provided with the anchor clamps 21 that surround adjustment face 13, adjustment component 14 is placed on these anchor clamps 21.

Under this state, the 1st lens 7 are placed on the 2nd lens 8 with the state of its adjustment face 12 at downside.

At this moment, by making non-optical function face 10,11 with optical axis 9 quadratures of the 1st lens 7 and the 2nd lens 8 contact with each other uniquely optical axis 9 directions location at two lens 7,8.

Secondly, as shown in Figure 8, by change the degree of tilt of adjustment component 14 with anchor clamps 21, the 1st lens 7 move in the direction with optical axis 9 quadratures.

At this moment, by adopting the optical meanss such as exploring table of the image formation state of exporting the 1st lens 7 and the 2nd lens 8, confirm the bias of the optical axis of two lens 7,8, the degree of tilt of adjustment component 14 is adjusted so that the optical axis 9 of two lens 7,8 is consistent with each other simultaneously, carried out the same axial adjustment of the 1st lens 7 and the 2nd lens 8.

At this moment, and with axial adjustment contrast, move up and down between the adjustment face 12,13 of the 1st lens 7 and the 2nd lens 8 by adjustment component 14 and to adjust chimeric degree, the 1st lens 7 and the 2nd lens 8 just are situated between chimeric with suitable chimeric degree by adjustment component 14.

After having carried out with axial adjustment, by being flowed between the adjustment face 12,13, bonding agent make two adjustment faces 12,13 bonding mutually, or except that bonding agent, also adjustment face 13 is implemented maintenance shown in Figure 4 with the thickening processing 19 of axial adjustment state etc., the manufacturing of the compound lens 6 that just is through with.

Secondly, other manufacture method to compound lens in the present embodiment 6 describes.

Also have, the method for the following stated is to be prerequisite with method that can enough statistics to the bias of the intrinsic optical axis 9 of regulation of creating conditions of the lens such as mould of making compound lens 6.

And, putting before this, at first, the 1st lens 7 and the 2nd lens of making down 8 carry out as Fig. 7 and the sort of same axial adjustment shown in Figure 8 to creating conditions fixed, simultaneously, stipulate this bias of optical axis down of creating conditions based on degree of tilt or position in the adjustment component 14 of coaxial adjusted state.

Also have, at this moment, the privileged site (peristome 17 etc.) of adjustment component 14 is decided to be benchmark, this privileged site that becomes benchmark pre-determines the position that is provided with of 14 pairs the 1st lens 7 of adjustment component and the 2nd lens 8 by detecting which position of the circumferencial direction between the adjustment face of being arranged on 12,13 in advance.

And, use identical the creating conditions of lens 7,8 with the bias of the above-mentioned optical axis 9 of regulation the time to make compound lens 6 for the 1st lens 7 and the 2nd lens 8 of basic manufacturing.

At this moment, as shown in Figure 9, to the adjustment face of the 2nd lens 8 implement in advance as the thickening processing of filling up bias help rib 19, perhaps, as Figure 10, shown in Figure 11, the adjustment face 13 of the 2nd lens 8 and the adjustment face 12 of the 1st lens 7 are implemented in advance as the stage portion of thickening processing.

In addition, be not limited to this, also can on adjustment component 14, be pre-formed the sort of protuberance 20 of filling up the bias of optical axis 9 shown in Figure 6.

Secondly, on the 2nd lens 8 of having implemented thickening processing, adjustment component 14 is set.At this moment, the setting of carrying out adjustment component 14 make adjustment component 14 be positioned at when carrying out predetermined the 2nd lens 8 with axial adjustment relative the position is set.

Do like this, just can carry out same axial adjustment uniquely by making institute's allocation of adjustment component 14 between the adjustment face 12,13 of the 2nd lens 8 and the 1st lens 7 simply.

Its result can improve the production efficiency of compound lens 6.

Secondly, the 2nd embodiment of compound lens of the present invention is described with reference to Figure 12 to Figure 14.

Also have, describe with prosign with the identical or similar place of the basic structure of the 1st embodiment.

Compound lens 25 its adjustment component 14 of present embodiment are identical with above-mentioned the 1st embodiment.

But in the present embodiment, the mode and the adjustment component 14 of the adjustment face 28,29 of the 1st lens 26 and the 2nd lens 27 are different with the 1st embodiment with respect to the method for the cooperation of adjustment face 28,29.

Promptly, as Figure 12, shown in Figure 14, in the outside of the optical function face 20 of the 1st lens 26, along the circumferential direction be provided with decide to be formed with at interval along optical axis 9 to the extended a plurality of extensions 31 of the 2nd lens 27 sides, be formed with the adjustment face 28 of the 1st lens 26 at the outer peripheral face of these extensions 31.This adjustment face 28 is formed among Figure 12 from the cross section, and optical axis 9 quadratures radially and the face that diminishes gradually upward of the distance between the optical axis 9.

On the other hand, as shown in Figure 12 and Figure 13, the outside at the optical function face 33 of the 2nd lens 27 is formed with a plurality of flange parts 34 between each extension 31 of the 1st lens 26, simultaneously, be formed with the adjustment face 29 of the 2nd lens 27 at the outer peripheral face of these flange parts 34.This adjustment face 29 is formed among Figure 12 from the cross section, and optical axis 9 quadratures radially and the face that diminishes gradually downwards of the distance between the optical axis 9.

And the adjustment face 28 of the 1st lens 26 and the adjustment face of the 2nd lens 27 29 have nothing in common with each other with optical axis 9 angulations.

And the periphery of the adjustment face 28 by making adjustment component 14 and the 1st lens 26 and the adjustment face 29 of the 2nd lens 27 is chimeric, comes the optical axis of the 1st lens 26 and the 2nd lens 27 is carried out same axial adjustment.

Like this, utilize adjustment component 14, can make the stress that acts on lens 26,27 keep evenly can carrying out stable same axial adjustment.

Also have, same with the 1st embodiment in the 2nd embodiment, the configuration by the spacer that carries out separating to the thickening processing of adjustment face 28,29 or with lens or in the formation of adjustment component 14 upper convex portion 20 just can be carried out same axial adjustment uniquely.

In addition, in Figure 12, contact indirectly by diaphragm 32 with being situated between, but that this diaphragm 32 disposes as required is just passable with the non-optical function face 11 of the light shaft positive cross of the 2nd lens 27 with the non-optical function face 10 of optical axis 9 quadratures of the 1st lens 26.

What secondly, Figure 15 showed is the 3rd embodiment of compound lens of the present invention.

Also have, describe with prosign with the identical or similar place of the basic structure of the 1st embodiment.

But different with the 1st embodiment in the present embodiment, adjustment component is made the sleeve 38 of the adjustment face 13 that surrounds the 2nd lens 8.

These sleeve 38 best its cross sectional shapes are rectangle, and its flat shape is the peristome that the some of annular has opening.In addition, and the non-optical function face 10,11 of optical axis 9 quadratures of the 1st lens 7 and the 2nd lens 8 between dispose diaphragm 39 with optical axis 9 quadratures, contact indirectly and locatees by the non-optical function face 10,11 by 39 two lens of this diaphragm 7,8 of being situated between in optical axis 9 directions of two lens 7,8.Also have, this diaphragm 39 disposes as required just can.

In this occasion, owing to just can suitably carry out the same axial adjustment of optics 7,8,39 by the degree of tilt of adjusting sleeve 38, so can utilize simple features simple structure and carry out same axial adjustment at an easy rate.

Also have, same with the 1st embodiment in the 3rd embodiment, by carrying out the thickening processing of adjustment face 13 etc., can carry out same axial adjustment uniquely.

Secondly, with reference to the 1st embodiment that lens unit of the present invention is described with reference to Figure 16.

The lens unit 41 of present embodiment is that the compound lens 6 with above-mentioned the 1st embodiment is installed on the lens barrel 42, and the optical axis 9 of compound lens 6 and the central shaft of lens barrel 42 are carried out same axial adjustment.

Here, the compound lens 6 that is installed on the lens unit 41 has been finished same axial adjustment in the stage of compound lens 6 as previously mentioned.

The result, among the compound lens 6, only one piece of lens (the 1st lens 7 among Figure 16) are carried out the same axial adjustment of its optical axis 9 and the central shaft of lens barrel 42 and be pressed into gradually in the lens barrel 42, just can be uniquely all optical axises 9 of each optics 7,8 of formation compound lens 6 and the central shaft of lens barrel 42 be carried out same axial adjustment.

Also have, in Figure 16, contact indirectly by diaphragm 45 with being situated between, but that this diaphragm 45 disposes as required is just passable with the non-optical function face 11 of optical axis 9 quadratures of the 2nd lens 8 with the non-optical function face 10 of optical axis 9 quadratures of the 1st lens 7.

In addition, in Figure 16, be formed with the inclined-plane 43 of the same axial adjustment that is used to carry out compound lens 6 and lens barrel 42 in the bottom of the outer peripheral face of the 1st lens 7, the adjustment component of using with axial adjustment 44 (for example, rubber-like parts such as spring) between the subtend face of this inclined-plane 43 and lens barrel 42, but can certainly utilize additive method to come compound lens 6 and lens barrel 42 are carried out same axial adjustment.

Secondly, shown in Figure 17 is the 2nd embodiment of lens unit of the present invention.

This lens unit 43 is installed in the compound lens 25 (having protuberance 20 among Figure 17 on adjustment component 14) of above-mentioned the 2nd embodiment in the lens barrel 47, and compound lens 25 and lens barrel 47 are carried out same axial adjustment.In addition, between the 1st lens 26 and the 2nd lens 27, disposed diaphragm 45 as required.

In the present embodiment, same with Figure 16, also in the same axial adjustment that just has been through with of stage of compound lens 25.And, in the lens unit 43 of Figure 17, by only one piece of lens 26 being carried out the same axial adjustment of its optical axis 9 and the central shaft of lens barrel 47 and being pressed into gradually in the lens barrel 47, just can carry out same axial adjustment to all optical axises 9 of compound lens 25 and the central shaft of lens barrel 47 uniquely.As a result, can improve the production efficiency of lens unit 43.

And, possess Figure 16 or the sort of lens unit 41,46 shown in Figure 17 or with the lens unit of compound lens shown in Figure 15 37 folding and unfoldings in lens barrel, possess the camera head of miscellaneous parts such as imaging apparatus simultaneously, because each optics to compound lens 6,25,37 has carried out having carried out suitable same axial adjustment with axial adjustment and to compound lens 6,25,37 and lens barrel 42 each other, so can bring into play good optical property.

Also have, the present invention is not limited to above-mentioned embodiment, can make various changes as required.

For example, the present invention can be effectively applied to possess the compound lens of lens more than 3 pieces.

In addition, in Figure 12, lens arrangement shown in Figure 17, also can be with sleeve as adjustment component.In this case, same with the compound lens of Figure 12, keep evenly by utilizing adjustment component to make to act on the stress on the lens, just can carry out more stable same axial adjustment, in addition, same with the lens unit 46 of Figure 17, can carry out the same axial adjustment of compound lens and lens barrel uniquely.

Have again, as shown in figure 18, also can make under the state that the 1st lens 49 and the 2nd lens 50 are in contact with one another, make the outer peripheral face of two lens 49,50 be entrenched in compound lens 48 in the sleeve 38.In this occasion,, also can carry out same axial adjustment easily by adjusting the angle of sleeve 38.Also have, in the compound lens 48 of Figure 18, each adjacent lens 49,50 and optical axis 9 angulations in the adjustment face 51,52 might not otherwise with, so long as the structure that Figure 19, the sort of each adjustment face 51,52 shown in Figure 20 are positioned on the concentric spherical that has the same center of curvature on the optical axis 9 is just passable.This occasion is formed on the inner peripheral surface of sleeve 38 and chimeric side of the 1st lens 49 and a side with the optical axis 9 angulations different composite inclined face chimeric with the 2nd lens 50, and meeting the dip plane with this, to carry out the same axial adjustment of each lens 49,50 just passable.

In addition, as shown in figure 21, also can adopt following structure, integrally formed diaphragm 53 on sleeve 38, being situated between simultaneously is in contact with one another the 1st lens 49 and the 2nd lens 50 by this diaphragm 53, and the central shaft of sleeve has the shape that depart from mutually a end in the direction of optical axis 9 and the other end.

This occasion, make by diaphragm 53 under the state that the 1st lens 49 and the 2nd lens 50 are in contact with one another being situated between, by making two lens 49,50 (circumferencial directions of lens) rotation around optical axis 9, just can make the relatively eccentric rotation of two lens 49,50, utilize this off-centre rotation can carry out the same axial adjustment of optics.

Claims (12)

1. A compound lens, a plurality of lenses are placed adjacent to each other on the optical axis direction, and the coaxial adjustment that makes the optical axes consistent with each other is carried out to the plurality of lenses at the same time, it is characterized in that the phase of the plurality of lenses is The non-optical functional surfaces of adjacent lenses are positioned in the direction of the optical axis of the adjacent lenses by directly or indirectly contacting through other components, and, on the plurality of lenses, the angle formed with the optical axis is between Adjacent lenses are different from each other and are used for coaxial adjustment of the adjacent lenses. Furthermore, the coaxial adjustment is performed by an adjustment component that cooperates with the adjustment surfaces of the two lenses. . 2. The compound lens according to claim 1, characterized in that, on the outside of the optical function surface of one lens among the adjacent lenses, an optical axis among the adjacent lenses along the optical axis is formed. While the extension portion extending on the other lens side, the adjustment surface of the one lens is formed on the inner peripheral surface of the extension portion, and at least a part of the outer peripheral surface of the other lens is located inside the extension portion, An adjustment surface of the other lens is formed at a position on the inner side of at least the extension portion of the outer peripheral surface, and the adjustment member is interposed between the adjustment surface of the one lens and the adjustment surface of the other lens. . 3. The compound lens according to claim 1, characterized in that, on the outside of the optical function surface of one lens among the adjacent lenses, there are formed along the optical axis at intervals along the circumferential direction. At the same time as a plurality of extension parts extending on the other lens side of the lens, the adjustment surface of the one lens is formed on the outer peripheral surface of these extension parts, and the adjustment surface of the one lens is formed on the outside of the optical function surface of the other lens. The adjustment surface of the other lens is formed on the outer peripheral surface of the plurality of flange portions between the extension portions of the one lens, and the adjustment member is fitted into the flange portion of the one lens. the adjustment surface and the outer periphery of the adjustment surface of the other lens. 4. The compound lens according to any one of claims 1 to 3, characterized in that, the adjustment member is formed as a ring-shaped member in contact with the adjustment surfaces of both adjacent lenses. 5. The compound lens according to any one of claims 1 to 3, characterized in that, the adjustment member is made as a sleeve that is in contact with the adjustment surfaces of both adjacent lenses. 6. The compound lens according to claim 4, wherein the adjusting member has a convex portion perpendicular to the optical axis, and the convex portion is aligned with the adjusting member facing on the non-optical function surface of the lens. site contact. 7. The compound lens according to any one of claims 4 to 6, wherein the adjustment member has a planar shape having an opening in a part of the ring. 8. A composite lens, wherein a plurality of lenses are placed adjacent to each other in the direction of the optical axis, and the plurality of lenses are simultaneously adjusted coaxially so that the optical axes are consistent with each other, it is characterized in that the plurality of lenses, the The non-optical functional surfaces of adjacent lenses are positioned in the direction of the optical axis of the adjacent lenses through direct or indirect contact with other components, and, on the plurality of lenses, form an angle with the optical axis Adjustment surfaces that differ from each other between adjacent lenses and are used for coaxial adjustment of the adjacent lenses. 9. A composite lens, wherein a plurality of lenses are placed adjacent to each other in the direction of the optical axis, and the plurality of lenses are simultaneously adjusted coaxially so that the optical axes are consistent with each other, it is characterized in that the plurality of lenses, the The non-optical functional surfaces of adjacent lenses are positioned in the direction of the optical axis of the adjacent lenses through direct or indirect contact with other components, and, on the plurality of lenses, form an angle with the optical axis The adjacent lenses are different from each other and are used for coaxial adjustment of the adjacent lenses, and furthermore, the adjustment is performed by a sleeve that cooperates with the adjustment surfaces of both adjacent lenses. Coaxial adjustment. 10. A lens unit, characterized in that the composite lens according to claims 1 to 9 is installed in a lens barrel. 11. The lens unit according to claim 10, wherein only one lens of the compound lens is pressed into the lens barrel. 12. An imaging device comprising the lens unit according to claim 10 or claim 11.

Images