JP2002231008A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which can easily adapt to diversification of structures such as a light source, a reflecting mirror, or kinds of light guides used, without degradation of utilization factor of light. SOLUTION: A light source part 10 is provided with an ellipsoidal reflective mirror 12, and a light source 11 placed near a first focal point of the reflective mirror 12. Then, a light guide 20 consisting of one or a plurality of optical fibers 21 is fixed to a case 50 through a fiber mounting bracket 22. Either the light source part 10 is equipped with a driving mechanism 30 or the fiber mounting bracket is equipped with a driving mechanism 40, to structure the distance between the light source part 10 and a light guide light-incident end face variable, hence the invented lighting device 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a lighting device.
More specifically, the present invention relates to a lighting device capable of efficiently guiding light emitted from a light source to a light guide, and performing illumination and dimming optimal for various light guides and light sources with a single device.

[0002]

2. Description of the Related Art FIGS. 26 and 27 are schematic structural views of a conventional illumination device. The lighting device 101 shown in FIG. 26 includes a light source 11 such as a halogen lamp and the light source 1.
The light source unit 10 includes a reflector for reflecting and condensing one light and a light guide 20 for guiding the condensed light. In the lighting device 101, an elliptical reflecting mirror 12 is used as a reflecting mirror.
The light source 11 is arranged near the focal point of the light source. The light guide 20 is provided with an end adapter 23,
The incident end face of the elliptical reflecting mirror 12 is fixed in the vicinity of the second focal point of the elliptical reflecting mirror 12 by means of the fiber mounting bracket 22 fixed to the elliptical reflecting mirror 12. Therefore, the light emitted from the light source 11 in the direction of the reflecting mirror 12 is reflected by the reflecting mirror 12, collected near the incident end face, and guided to the light guide 20.

In a lighting apparatus 102 shown in FIG. 27, a parabolic reflecting mirror 13 is used as a reflecting mirror, and a light source 11 is arranged near a focal point of the parabolic reflecting mirror 13. In the illuminating device 102, the condenser lens 19 is disposed between the light source 11 and the light guide 20, and the light guide 20 has its incident end face fixed near the focal point of the condenser lens 19. Accordingly, light emitted from the light source 11 in the direction of the reflecting mirror 13 is reflected by the reflecting mirror 13, condensed by the condenser lens 19, and then guided to the light guide 20.

The light guide 20 is composed of an optical fiber 21 made of glass or resin, and the optical fiber 21 (hereinafter, referred to as a "single fiber") or one as shown in FIGS. 28 (a) and 28 (b). Multiple optical fibers 2
1 bundled (referred to as “bundle fiber”) is used. In the following description, in the case of the glass optical fiber 21, a bundle of a plurality of thin optical fibers is handled as one optical fiber 21.

Since the positional relationship of the optical systems in these illumination devices 101 and 102 is fixed, the light guide 2
The spot diameter S at the zero incident end face is fixed. As a result, for example, in the case of a light guide specification including one optical fiber 21 as shown in FIG. 29A, application to a light guide 20 including seven optical fibers 21 shown in FIG. Then, the light is focused only on the optical fiber 21 located at the center, and sufficient light does not enter the optical fiber 21 located at the periphery, and the variation of the light flux incident on each optical fiber 21 increases. On the other hand, when a light guide specification including seven optical fibers 21 shown in FIG. 30A is used, a single optical fiber 21 shown in FIG.
If applied to the light guide 20 consisting of
Are larger than the incident end face of the light guide 20 and the incident efficiency is reduced. Therefore, in order to increase the incident efficiency and reduce the variation of the incident light flux, the optical fiber 21 is required.
It is necessary to configure the lighting device according to the configuration of (1).

On the other hand, if the type of the light source 11 is changed or the size of the reflecting mirror 12 is changed, the spot diameter S at the incident end face of the light guide 20 is not optimized, and the incidence efficiency is reduced. Accordingly, in the above-described configuration, the type of the light source 11 and the reflecting mirror
Was difficult to change to a different size.

FIG. 31 (a) is a schematic diagram of another conventional example of a bundle fiber type lighting device 103 for a bundle fiber.
A shutter device 51 is provided between the focal point and the light source 11. As shown in FIG. 31B, the shutter device 51 includes a rotating disk 5 that rotates around a rotating shaft 53.
In FIG. 4, openings 52 having different sizes are provided so that only the desired optical fiber 21 is incident. In this case, the spot diameter S irradiated to the shutter device 51 is larger than the opening 52, and the light blocked by the shutter device 51 is directly lost, and the light use efficiency is reduced. Further, the illumination device 103 is operated by the shutter device 51.
And the size of the lighting device 103 increases.

Further, a lighting device 104 shown in FIG.
As shown in FIG. 32, between the second focal point of the elliptical reflecting mirror 12 and the light source 11, a rotating disk 80 (FIG. 32B) provided with various types of ND filters 82 having different transmittances may be disposed. If a rotating disk 80 (FIG. 32 (c) in FIG. 32) having a plurality of apertures 83 having different aperture values or different optical characteristics is provided, the lighting device 104 can be dimmed. But,
According to these methods, the loss due to a filter or the like is large, the system efficiency is reduced, and the installation of the rotating disk 80 increases the size of the lighting device 104. Further, the light source 11 can be changed to a dimming lamp to perform dimming, but replacement of the light source 11 is difficult.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in consideration of a light source, a reflecting mirror, a type of a light guide to be used, and the like without reducing the light use efficiency. An object of the present invention is to provide a lighting device which can easily cope with diversification of the structure of the lighting device.

[0010]

According to the present invention, there is provided an illuminating apparatus comprising: a light source unit having a light source; a reflecting mirror having the light source disposed near a focal point; and a light having a light incident end disposed toward the light source unit. In a lighting device provided with a guide, an irradiation area of irradiation light irradiated from the light source unit toward the light incident end is variably configured.

At this time, the irradiation area can be changed by changing the distance between the light source section and the light incident end. For example, a drive mechanism that enables the light incident end to move along the optical axis, or that allows the light incident end to move at a fixed portion of the light guide may be provided. Furthermore, the guide light may be exchangeable, and the fixed position of the light incident end may be made variable.

In the lighting device of the present invention, an elliptical reflecting mirror can be used as the reflecting mirror, and the light source can be arranged near the first focal point of the elliptical reflecting mirror.

In this case, the distance between the light source unit and the light incident end can be changed by making the light source unit movable along the optical axis.

Further, it is preferable that the light source unit and / or the light incident end be movable in a plane perpendicular to the optical axis.
In addition, a driving mechanism capable of moving the light source unit three-dimensionally is provided.
It is preferable to change the position of the light source three-dimensionally, or to provide a swing mechanism in the light source portion or the fixed portion of the light guide so that the incident angle of the irradiation light can be adjusted.

In the illumination device of the present invention, a parabolic reflector may be used as the reflector, and the light source unit may include a condenser lens between the light source and the light incident end. Good.

In this case, the distance between the light source unit and the light incident end can be changed by making the condenser lens movable along the optical axis. In addition, it goes without saying that the light incident end may be movable in a plane perpendicular to the optical axis.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. The lighting device according to the present invention includes a light source unit including a light source such as UHL, a reflecting mirror that reflects light emitted from the light source, and a light guide that guides light from the light source unit. . In the illuminating device, for example, the positional relationship between the incident end surface of the light guide and the light source unit is configured to be variable, and the irradiation area of the irradiation light emitted from the light source unit toward the light incident end is variable. .

In the lighting device 1 shown in FIG. 1, the position of the light source unit 10 is configured to be movable. In the light source unit 10, an elliptical reflecting mirror 12 is used as the reflecting mirror 12, and the light source 11 uses a mounting hole 16 of a fixing jig 15 opened near the top of the reflecting mirror 12 as shown in FIG. Thus, it is arranged near the first focal point near the elliptical reflecting mirror 12. The light guide 20 is provided with an end adapter 23 around the light guide 20 by a required amount from the incident end face of the light guide 20. The end adapter 23 is inserted into and fixed to a substantially cylindrical fiber attachment 22 fixed to, for example, a housing 50 in which the light source unit 10 is disposed. Further, the center of the light guide incident end face is located on the optical axis L.

The light source unit 10 is movably arranged by a driving mechanism 30. For example, the drive mechanism 30 of the lighting device 1 shown in FIG. 2 includes a slide guide 31 attached to a housing 50 and the like, and a slide plate 33 inserted into grooves 32 provided at both ends of the slide guide 31. Is provided. The reflecting mirror 12 is attached to a substantially plate-shaped fixing jig 15, and the fixing jig 15 is a rod-shaped support portion 17.
And is fixed to the slide plate 33 via. Further, the slide plate 33 moves along the groove 32, and the light source unit 10 moves parallel to the optical axis L. Accordingly, the light source unit 10 moves closer to or farther from the incident end face of the light guide 20 on the optical axis L.

The drive mechanism 30 shown in FIG. 3 is constituted by a gear mechanism, and a gear (not shown) provided on the lower surface of the slide plate 33 and a guide in which a screw thread meshing with the gear is continuously formed. And a shaft 35. The guide shaft 35 is provided substantially in the center of the slide guide 31 in parallel with the optical axis L, and rotates the grip portion 36 provided on the upper surface of the slide plate 33 so that the slide plate 33 moves on the guide shaft 35.
The light source unit 10 moves on the optical axis L by such a driving mechanism 30, and the distance between the light source 11 and the incident end face of the light guide 20 changes easily.

Therefore, when the light guide 20 made of a single fiber having a relatively large diameter as shown in FIG. 4 is used, the light guide entrance end face is located near the focal length f of the elliptical reflecting mirror 12, and The spot diameter S is adjusted to be substantially the same as the diameter of the light guide 20. As a result, almost all of the light from the light source 11 can be incident on the light guide incident end face. In this case, for example, as shown in FIG. 5A, when a light guide 20 having a large diameter is used, a state in which the distance D between the light source 11 and the light guide incident end face matches the focal length f of the elliptical reflecting mirror 12. In this case, the spot diameter S becomes smaller than the diameter of the light guide 20 as shown in FIG. For this reason, light is condensed only in a part of the light guide incident end face, and the heat load on the light guide 20 increases.
In this case, as shown in FIG. 6A, the distance D between the light source 11 and the incident end face of the light guide 20 is made shorter than the focal length f, and the spot diameter S is changed to the light guide as shown in FIG. By making the diameter approximately the same as that of the 20 diameter, light can be uniformly collected on the light guide entrance end face. Therefore, the light is uniformly collected on almost the entire light guide entrance end face, and the heat load is uniformed.
The deterioration of the light guide 20 due to heat is reduced.

Further, as shown in FIG. 7, the light source section 10 is further brought closer to the light guide entrance end face, the spot diameter S is made larger than the light guide diameter, and the amount of light (incident light flux) incident on the light guide can be reduced. As described above, in the lighting device 1 of the present invention, the light source unit 10 is movable, and the distance between the light guide incident end face and the light source 11 can be easily changed, so that dimming control can be easily performed. Note that, in the above case, the light source unit 10 is considered in the case where the incident end face is closer than the focal length of the reflecting mirror 12, but the light source unit 10 is similarly considered when the incident end face is farther than the second focal point. Can be adjusted. In this case, the spot diameter S can be increased by moving the light source unit 10 away from the incident end face.

As shown in FIG. 8, the lighting device 1 is applicable to a light guide 20 made of a bundle fiber. In FIG. 8, a light guide 20 composed of seven optical fibers 21 is used. In this case, if the incident end face is closer to the light source section 10 than the second focal point (the focal point close to the incident end face) of the light source 11 and the spot diameter S and the diameter of the light guide 20 substantially match, the light use efficiency can be improved. Can be condensed on almost the entire light guide entrance end face without lowering. Especially when using bundle fiber,
Light is uniformly incident on each optical fiber 21. As a result,
Concentration of heat on a part of the incident end face of the optical fiber 21 can be avoided, and as a result, the life of the light guide 20 can be extended.

Various light sources can be used as the light source 11. However, if a light source having a small light emitting portion is used, the light condensing property is improved, so that the minimum spot diameter S is reduced and the change in the spot diameter S is increased. it can.

Further, since the size of the spot diameter S can be easily changed by changing the distance between the light source unit 10 and the incident end face, the type of the elliptical reflecting mirror 12, for example, when the aperture and the focal length f are exchanged. It is also easy to optimize utilization efficiency. As a result, the degree of freedom of the lighting device 1 is increased, and the lighting device 1 can be applied to various lighting devices with one configuration.

As long as the distance between the light source 11 and the light guide 20 can be changed in this way, not only can the light source unit 10 be configured to be movable, but also the light source unit 10 can be fixed and the position of the light guide entrance end face can be moved. You may.

FIG. 9 is a schematic configuration diagram showing a lighting device 1 according to another embodiment of the present invention. In the lighting device 1, a light source unit 1 including a light source 11 and an elliptical reflecting mirror 12
0 is a fixed state, and the light guide entrance end face is configured to be movable on the optical axis L by the drive mechanism 40. FIGS. 10A and 10B are explanatory views showing the drive mechanism 40, respectively. The drive mechanism 40 can be applied without any particular limitation. For example, in the one shown in FIG. 10A, a gear mechanism is provided, and a gear 41 rotatably provided on the fiber attachment 22 and a screw meshing with the gear 41 provided on the outer peripheral surface of the end adapter 23. A mountain 42 is provided. Therefore, by rotating the gear 41, the light guide entrance end face can be slid on the optical axis L.

FIG. 10 (b) shows a screw mechanism which comprises a male screw 43 or a female screw cut on the outer peripheral surface of the end adapter 23, and a female screw cut on the inner surface of the fiber fitting 22. 44 or a male screw. In this drive mechanism 40, the end adapter 23 (light guide 20) can be rotated to slide the light guide incident end face on the optical axis L.

Therefore, in the case of the light guide 20 made of a single fiber as shown in FIG. 11 (a), the position of the light guide incident end face is adjusted so that the incident end face is positioned near the second focal point of the reflecting mirror 12. Then, as shown in FIG. 11B, the spot diameter S is adjusted so as to be substantially the same as the diameter of the light guide 20. In the case of the light guide 20 made of a bundle fiber as shown in FIG. 12A, the incident end face is brought close to the light source unit 10, and the spot diameter S is almost the same as the diameter of the light guide 20 as shown in FIG. Position the size. Thus, by these drive mechanisms 40,
By changing the position of the incident end face of the light guide 20, the size of the spot diameter S can be adjusted.

The light guide 20 may be moved by the hand instead of the driving mechanism 40 for moving the incident end face. For example, in the one shown in FIG. 13, a stopper 45 capable of tightening and fixing the end adapter 23 is provided on the fiber attachment 22. Release the stopper 45 and set the light guide 2
0 can be moved. Moreover, in the lighting fixture in FIG.
The light guide 20 can be fixed to the fiber mounting bracket 22 in a replaceable manner. In this case, end adapters 23 having different lengths are attached according to the number (thickness) of the optical fibers 21 constituting the light guide 20 used as shown in FIG. That is, in the case of a single fiber as shown in FIG. 15A, an end adapter 23 having a short insertion length is used so as to shorten the distance from the light source 11, and as shown in FIG. Four optical fibers 2
In the case of a bundle fiber consisting of seven optical fibers 21, the end adapter 23 having an intermediate insertion length is further connected to a relatively large diameter, for example, seven optical fibers 21, as shown in FIG. Is provided with an end adapter 23 having a relatively long insertion length. In this manner, the fixing position of the light guide incident end face may be adjusted by replacing the light guide 20 or changing the insertion length of the light guide 20.

Next, in the illuminating device 1 of the present invention, not only the distance between the light source 11 and the light guide incident end face but also the incident position on the light guide incident end face may be changed. FIG. 16 is a schematic configuration diagram showing still another driving mechanism 30 of the light source unit 10. This drive mechanism 30
Is a drive base 37 movably mounted in the X-axis direction (the optical axis L direction), a vertical portion 38 in which the drive base 37 is movably mounted in the Z-axis direction, and a vertical portion 38 in the Y-axis direction And a slide portion 39 which is slidably mounted on the slide portion 39. The slide portion 39 includes, for example, a guide portion 39a fixed to the bottom surface of the housing 50, and a guide table 39b fitted to the guide portion 39a and movable along the guide portion 39a. The guide portion 39b has the vertical portion 38
Is provided. The slide portion 39 moves to move the light source 11
Moves in the Y-axis direction. Further, the vertical portion 38 moves and the light source 11 moves in the Z-axis direction. Further, the drive base 37 moves and the light source 11 moves in the X-axis direction. As described above, according to the driving mechanism 40, the light source 11 can move three-dimensionally in the X-axis direction, the Y-axis direction, and the Z-axis direction.

The lighting device 1 uses a light guide 20 made of a bundle fiber. Therefore, FIG.
As shown in FIG. 7A, the spot diameter S can be adjusted to a size substantially equal to the diameter of one optical fiber 21 by moving the light source unit 10 in the X-axis direction and moving the light source 11 away from the light guide 20. Further, the light source unit 10 can be moved in the Y-axis direction and / or the Z-axis direction, and can be focused on one optical fiber 21 as shown in FIG. Also, as shown in FIG. 18A, by moving the light source unit 10 in the X-axis direction and slightly approaching the light guide 20, for example, as shown in FIG.
Light can be collected on the optical fiber 21. In this way, the light source unit 10 can be driven three-dimensionally to converge light on a desired specific optical fiber 21 while increasing the light use efficiency. Further, as shown in FIG. 19, three optical fibers 21
It can also be applied to bundle fibers arranged in the axial direction. In this case, the light can be focused only on the desired optical fiber 21 only by moving the drive mechanism 40 in the Z-axis direction.

As described above, the light source unit 10 can be driven three-dimensionally so that light can be focused only on a desired optical fiber 21.
As a result, light can be controlled to a plurality of irradiation spaces using each optical fiber 21. Especially in such a configuration,
If a light source 11 having a short light emission length, for example, a short arc metal halide lamp or a super-depressurized mercury lamp, is used, the spot diameter S can be made smaller. Light can be easily emitted.

Further, the light source unit 10 can be driven by the driving mechanism 30 to move the light guide incident end face three-dimensionally. In the illumination device 1 shown in FIG. 20 (b), the fiber mounting bracket 22 can be moved in a three-dimensional direction by, for example, a driving mechanism having the configuration shown in FIG. 16, and the position of the light guide entrance end face is changed. Can be In such a lighting device 1 as well, as shown in FIG.
Light can be collected at 1.

Further, in the present invention, both the light source unit 10 and the light guide entrance end face may be movable.
For example, in the lighting device 1 shown in FIG.
A drive mechanism 40 using a gear mechanism as shown in FIG. 3A is provided on the fiber mounting member 22, and can move the light guide incident end face in the X-axis direction. Although not shown, FIG.
The light source unit 10 is provided with a drive mechanism including a vertical part 38 for moving the fixing jig 15 in the Z-axis direction and a slide part 39 slidable in the Y-axis direction, as in the drive mechanism 30 shown in FIG. In this lighting device, the light guide entrance end face can be moved on the optical axis L by the drive mechanism 40 and the light source unit 10 can be moved on the XZ plane. In this way, both the light source unit 10 and the light guide entrance end face can be moved to converge on a single optical fiber 21.

The illumination device 1 shown in FIG. 22 is provided with a swing mechanism for changing the irradiation direction of the light source unit 10. As shown in FIG. 23, the swing mechanism 60 includes a spherical portion 61 provided at a tip of a support portion 17 extending below the fixing jig 15 and a guide portion provided to wrap the spherical portion 61. 62. The spherical portion 61
It is fixed by tightening a tightening screw 63 provided on the guide portion 62. A fixing bar 64 is provided below the guide portion 62 and is fixed to the housing 50 or the like. The swing mechanism 60 can change the emission angle from the light source 11 by loosening the tightening screw 63. In addition, the illumination device 1 includes a drive mechanism 40 that moves the light guide incident end face in the Y-axis direction. As a result, the light guide entrance end face is moved by the driving mechanism 40, the spot diameter S is adjusted to be substantially the same as the diameter of the light guide 20, and the emission direction is adjusted by the oscillating mechanism 60. Light can be focused only on the fiber 21. According to such a swing mechanism 60, it can be configured smaller than a drive mechanism that moves the light source unit 10 or the light guide 20 in the YZ plane. Therefore, the light source unit 10 of the lighting device 1 can be made compact, and the lighting device 1 can be made small. In addition, since it can be configured with a simple mechanism, the manufacturing cost can be reduced.

The swing mechanism 60 can also be mounted on the fiber fitting 22 as in the lighting fixture shown in FIG. In the lighting device 1, the light source unit 10 includes a drive mechanism 40 that can move in the X-axis direction. In the illumination device 1, the light source unit 10 is moved by the driving mechanism 40 to adjust the spot diameter S to substantially the same as the diameter of the light guide 20, and the direction of the light guide entrance end face is changed by the swing mechanism 60. Thus, the light can be focused only on the specific optical fiber 21.

FIG. 25A is a schematic configuration diagram of a lighting device 1 according to still another embodiment of the present invention. In the lighting device 1, a parabolic reflecting mirror 13 is used. The light source unit 10 in the lighting device 1 includes a light source 11, a parabolic reflector 13, and a condenser lens 19 that collects light reflected by the parabolic reflector 13. The condenser lens 19 is provided so as to be movable in the X-axis direction by a driving mechanism 70 having substantially the same configuration as the driving mechanism 30 shown in FIGS. 2 and 3, for example. Therefore, when applied to the light guide 20 made of a single fiber, the condenser lens 19 is brought closer to the light source 11 and almost to the focal position of the condenser lens 19. Then, the spot diameter S is made substantially the same as the diameter of the light guide 20, and the light use efficiency can be maximized.

When the present invention is applied to a light guide 20 made of a bundle fiber, the condenser lens 19 is moved away from the light source 11 as shown in FIG.
Is located closer to the light guide incident position than the focal position. Then, the spot diameter S is made substantially the same as the diameter of the light guide 20, so that the light use efficiency can be maximized. In this case, if the condensing lens 19 is moved closer to the light source 11 and the spot diameter S is reduced, the light can be condensed on one optical fiber 21. Further, it goes without saying that the light guide 11 may be located closer to the light source 11 so that the light guide entrance end face is located farther than the focal length of the light collecting lens 19.

As described above, even when the parabolic reflector 13 is used, the light use efficiency can be improved by changing the distance between the light source 11 and the light guide entrance end face. Needless to say, a drive mechanism 40 for moving the fiber mounting bracket 22 in the XY axis directions may be provided to focus the light on the specific optical fiber 21.

[0041]

According to the present invention, since the irradiation area of the irradiation light irradiated from the light source section toward the light incident end is variably configured, the light is emitted from the light source and is incident on the light incident end. The spot diameter can be easily adjusted. For this reason, it is possible to always guide the light to the light incident end in an optimum state regardless of the type of the light source, the reflecting mirror, the light guide, and the diameter of the guide light.
Therefore, the light emitted from the light source and the light reflected by the reflecting mirror are uniformly collected at the light incident end, and the utilization efficiency is always kept to the maximum irrespective of the type of the light guide. In a light guide composed of a plurality of optical fibers, light is condensed on a specific optical fiber or uniformly condensed. Alternatively, light can be easily adjusted by changing the size of the spot diameter. As described above, according to the present invention, even if the configuration of a single lighting device is diversified, optimization can be easily performed.

For example, the reflecting mirror is an elliptical reflecting mirror, and the light source is arranged near the first focal point of the elliptical reflecting mirror to constitute a light source section. The light incident end and the light source section are arranged along the optical axis. Just move it. In particular, if the light incident end and the light source can be moved within a plane perpendicular to the optical axis, the light flux can be controlled for each optical fiber constituting the light guide. As a result, unnecessary heat load on the unnecessary optical fiber is reduced, which can contribute to a longer life of the lighting device.

Further, the guide light may be exchanged so that the fixed position of the light incident end can be changed, and the configuration can be made very simple. Therefore, it is possible to greatly contribute to downsizing and cost reduction of the lighting device.

Further, a swing mechanism may be provided in the light source section or the fixing section of the light guide so that the incident angle of the irradiation light can be adjusted. According to this, a small driving mechanism can be used, and the size of the lighting device can be further reduced.

Alternatively, the reflecting mirror may be a parabolic reflecting mirror, and a condenser lens may be arranged between the light source and the light incident end to constitute a light source section. The same effect can be obtained even if the light incident end is movable in a plane perpendicular to the optical axis.

As described above, according to the illuminating device of the present invention, it is possible to cope with various kinds of light guides and reflecting mirrors by using one type and one type of configuration, to improve light use efficiency, and to provide various types of illumination. it can.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a lighting device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a driving mechanism of a light source unit in the lighting device of the above.

FIG. 3 is a configuration diagram showing another driving mechanism of a light source unit in the lighting device of the above.

FIGS. 4A and 4B are explanatory diagrams showing a relationship between a position of a light source unit and a spot diameter in the illumination device of the above.

FIGS. 5A and 5B are explanatory diagrams showing a relationship between a position of a light source unit and a spot diameter in the lighting device of the above.

FIGS. 6A and 6B are explanatory diagrams showing a relationship between a position of a light source unit and a spot diameter in the illumination device of the above.

FIGS. 7A and 7B are explanatory diagrams showing a relationship between a position of a light source unit and a spot diameter in the illumination device of the above.

FIGS. 8A and 8B are explanatory diagrams showing the relationship between the position of a light source unit and the spot diameter in the illumination device of the above.

FIG. 9 is a schematic configuration diagram of a lighting device according to another embodiment of the present invention.

FIGS. 10A and 10B are configuration diagrams showing a driving mechanism of a light guide incident end face in the illumination device of the above.

FIGS. 11A and 11B are explanatory views showing the relationship between the position of the light guide entrance end face and the spot diameter in the illumination device of the above.

FIGS. 12A and 12B are explanatory diagrams showing the relationship between the position of the light guide entrance end face and the spot diameter in the lighting device of the above.

FIG. 13 is an explanatory view showing a method of fixing a light guide incident end face in the lighting device of the above.

FIG. 14 is an explanatory diagram showing another method of fixing the light guide entrance end face in the lighting device of the above.

FIGS. 15 (a), (b) and (c) are explanatory views showing a method of adjusting the position of the light guide entrance end face in the illumination device of the above.

FIG. 16 is a configuration diagram showing another driving mechanism of the light source unit in the lighting device of the above.

FIGS. 17A and 17B are configuration diagrams showing a driving mechanism of a light guide incident end face in the illumination device of the above.

FIGS. 18 (a) and (b) are explanatory views showing the relationship between the position of the light guide entrance end face and the spot diameter in the illumination device of the above.

FIGS. 19A and 19B are explanatory diagrams showing a relationship between a position of a light guide entrance end face and a spot diameter in the illumination device of the above.

FIGS. 20 (a) and (b) are explanatory views showing the relationship between the position of the light guide entrance end face and the spot diameter in a lighting device according to still another embodiment of the present invention.

FIG. 21 is a schematic configuration diagram of a lighting device according to still another embodiment of the present invention.

FIGS. 22 (a) and 22 (b) are explanatory views showing the relationship between the position of the light guide entrance end face and the spot diameter in a lighting device according to still another embodiment of the present invention.

23 is a schematic configuration diagram of a swing mechanism in the lighting device shown in FIG. 22.

FIGS. 24 (a) and (b) are explanatory diagrams showing the relationship between the position of the light guide entrance end face and the spot diameter in a lighting device according to still another embodiment of the present invention.

FIGS. 25A and 25B are explanatory diagrams showing the relationship between the position of the light guide entrance end face and the spot diameter in a lighting device according to still another embodiment of the present invention.

FIG. 26 is a schematic configuration diagram of a conventional illumination device.

FIG. 27 is a schematic configuration diagram of another conventional illumination device.

28A and 28B are diagrams showing a bundle fiber composed of a plurality of optical fibers, wherein FIG. 28A is a side view thereof, and FIG. 28B is an end view thereof.

FIGS. 29A and 29B are diagrams showing problems in a conventional single-fiber type illumination device.

FIGS. 30 (a) and (b) are diagrams showing problems in a conventional bundle fiber type lighting device.

FIG. 31 (a) is a schematic configuration diagram of a lighting device as still another conventional example, and FIG. 31 (b) is a front view of a rotating disk in the lighting device.

32 (a) is a schematic configuration diagram of a lighting device as still another conventional example, FIG. 32 (b) is a front view of a rotating disk in the lighting device, and FIG. 32 (c) is another rotating disk. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Illumination device 10 Light source part 11 Light source 12 Elliptical reflection mirror 13 Parabolic reflection mirror 15 Fixing jig 16 Mounting hole 17 Support part 19 Condensing lens 20 Light guide 21 Optical fiber 22 Fiber mounting bracket 23 End adapter 30 Drive mechanism 31 Slide guide 32 Groove 33 Slide plate 35 Guide shaft 40 Light guide drive mechanism 41 Gear 42 Thread 43 Male screw 44 Female screw 45 Stopper 50 Housing 60 Swing mechanism 61 Spherical part 62 Guide part 63 Tightening screw 64 Fixed Rod 70 Driving mechanism of condenser lens

Claims (13)

[Claims] 1. A lighting device comprising: a light source unit including a light source and a reflecting mirror in which the light source is disposed near a focal point; and a light guide having a light incident end facing the light source unit. The illumination device is characterized in that the irradiation area of the irradiation light irradiated toward the light incident end from is variable. 2. The lighting device according to claim 1, wherein a distance between the light source unit and the light incident end is made variable. 3. The lighting device according to claim 1, wherein said light incident end is movable along an optical axis. 4. The lighting device according to claim 3, wherein a driving mechanism that enables the light incident end to move is provided on a fixing portion of the light guide. 5. The illumination device according to claim 1, wherein the guide light is replaceable, and a fixed position of the light incident end is made variable. 6. The elliptical reflecting mirror according to claim 1, wherein the light source is disposed near a first focal point of the elliptical reflecting mirror. The lighting device according to any one of the above. 7. The lighting device according to claim 1, wherein the light source unit is movable along an optical axis. 8. The apparatus according to claim 1, wherein the light source unit and / or the light incident end is movable in a plane perpendicular to an optical axis. The lighting device according to claim 1. 9. The lighting device according to claim 8, wherein the light source unit includes a driving mechanism that can move three-dimensionally. 10. The light source unit or a fixed part of the light guide, wherein a swing mechanism is provided so that an incident angle of the irradiation light can be adjusted.
The lighting device according to any one of 5, 6, 7, 8 and 9. 11. The reflecting mirror is a parabolic reflecting mirror,
The lighting device according to claim 1, wherein the light source unit includes a condenser lens between the light source and the light incident end. 12. The illumination device according to claim 8, wherein the condenser lens is movable along an optical axis. 13. The light incident end is movable in a plane perpendicular to the optical axis.
The lighting device according to any one of claims 3 to 7.