TW202111368A - Lens mount, optical element, and lens module - Google Patents

Abstract

A lens module includes a lens mount, at least one lens, and a positioning ring. The lens mount is cylinder-shaped and has an inner peripheral face. The inner peripheral face encloses a receiving space. The lens mount has a first end and a second end along an axial direction. The inner peripheral face has a positioning section near the first end. The at least one lens is arranged in the receiving space, and the outer peripheral face of the at least one lens contacts the inner peripheral face of the lens mount. The positioning ring is arranged in the receiving space, and the outer peripheral face of the positioning ring corresponds to the positioning section to prevent the at least one lens from falling out. At least one of the positioning section and the outer peripheral face of the positioning ring includes an annular rough section. The rough section includes a plurality of grooves for injecting with an adhesive. The grooves are spacedly arranged around the axial direction. A rib is formed between any two adjacent grooves. An end of each of the grooves closer to the first end is defined as a third end, and an end closer to the second end is defined as a fourth end. A width of each of the grooves is increasing from the fourth end toward the third end so that an angle between two lateral walls of the groove is larger than 0 degree but smaller than 90 degrees.

Description

Lens mounts, optical components and lens modules

The invention relates to a lens holder, an optical element and a lens module.

Generally speaking, a lens module is composed of a lens mount and lenses. The inner ring surface of the lens mount usually has a plurality of grades for positioning the multiple lenses in sequence, so that the distance between the lenses is accurate, and the lens mount The larger inner diameter end of the lens is usually fixed to the inner ring surface of the lens holder with a pressure ring, which not only prevents the lens from falling out, but also further ensures the precise position of each lens and provides a protective effect.

In addition to the tight-fitting or snap-fitting structure for positioning the pressure ring, there are also axially extending grooves formed at the corresponding positions on the inner ring surface of the lens holder, and adhesive is injected into the groove to fix the pressure ring, as described in patent TW I616698 .

However, the above structure faces a dilemma: To maintain a larger contact area between the lens mount and the pressure ring, the grooves should not be too large, or the width of the grooves should not be too wide, while the narrow grooves cause To solve the problem that the adhesive is difficult to inject, and the groove penetrates axially, the adhesive may overflow to the lens, causing lens contamination.

On the other hand, although the spacer ring or pressing ring in the lens module does not directly participate in the imaging, it is an indispensable element for fixing the position of the lens. However, when light hits these optical elements, it will form miscellaneous elements. Astigmatism may affect the image quality.

In order to prevent stray light from affecting imaging, uneven structures are usually used to disperse stray light to avoid concentration of stray light, as shown in patents TW I612354, TW I616697, and TW I639029, usually around the optical part of the lens or between the spacer ring. A fine concavo-convex structure is formed on the inner ring surface and other places.

However, the conventional concave-convex structure is extremely uniform in shape, such as concentric annular grooves, radial radial straight grooves, etc., and the reflection surface formed by the same direction, even has the possibility of concentrating stray light, which is effective in eliminating stray light. It needs to be strengthened.

The main purpose of the present invention is to provide a lens mount, an optical element and a lens module, which have a special concave-convex structure, which is easy to fill with adhesive or can be used to eliminate stray light.

In order to achieve the above objective, the present invention provides a lens holder, which is cylindrical and has an inner ring surface. The inner ring surface encloses an accommodating space for accommodating at least one optical element. One end and a second end, the inner ring surface near the first end includes a ring-shaped concave-convex section, the concave-convex section is provided with a plurality of concave grooves, the concave grooves are arranged at intervals around the axial direction of the lens mount , A convex rib is formed between any two grooves, the end of each groove closer to the first end is defined as a third end, and the end of each groove closer to the second end is defined as a fourth end, The width of each groove in a circumferential direction gradually expands from the fourth end to the third end, so that the two side walls of each groove sandwich a first angle, and the first angle is greater than 0 degrees and less than 90 degrees.

In order to achieve the above-mentioned object, the present invention also provides an optical element, which is ring-shaped and has an inner ring surface, the inner ring surface is formed with a concave-convex section, the concave-convex section is provided with a plurality of concave grooves, the concave grooves around the optical One of the elements is spaced apart in the axial direction, and a convex rib is formed between any two grooves. The two ends of each groove in the axial direction are a fifth end and a sixth end, and the width of each groove is along the circumferential direction. It gradually expands from the sixth end to the fifth end, so that the two side walls of each groove sandwich a third angle, and the third angle is greater than 0 degrees and less than 90 degrees.

To achieve the above objective, the present invention further provides a lens module, which includes a lens mount, at least one lens, and a pressure ring.

The lens mount is cylindrical and has an inner ring surface, the inner ring surface encloses an accommodating space, the axial ends of the lens mount are respectively a first end and a second end, and the inner ring surface is close to the first end. One end includes a stop section; the at least one lens is disposed in the accommodating space and its outer ring surface is in contact with the inner ring surface of the lens mount; the pressure ring is disposed in the accommodating space and its outer ring surface Corresponding to the sealing section of the lens holder to prevent the at least one lens from falling out of the first end of the lens holder; wherein at least one of the sealing section and the outer annular surface of the pressing ring includes a ring-shaped Concave-convex section, the concave-convex section is provided with a plurality of concave grooves for injecting an adhesive, the concave grooves are arranged at intervals around the axial direction of the lens mount, and a convex rib is formed between any two concave grooves, each of the concave grooves is relatively larger The end close to the first end is defined as a third end, the end of each groove closer to the second end is defined as a fourth end, and the width of each groove in the circumferential direction is from the fourth end to the third end Gradually expand, so that the two side walls of each groove sandwich a first angle, and the first angle is greater than 0 degrees and less than 90 degrees.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

1 to 10, the present invention provides a lens holder 10, which is cylindrical and has an inner ring surface. The inner ring surface surrounds an accommodating space for accommodating at least one optical element. The ends are respectively a first end 11 and a second end 12. The inner ring surface near the first end 11 includes a ring-shaped concave-convex section 13 provided with a plurality of concave grooves 131. The concave grooves 131 are arranged at intervals around the axial direction of the lens holder 10, and a convex rib 132 is formed between any two concave grooves 131. Preferably, the surface of each convex rib 132 is parallel to the axial direction; each concave groove 131 The end closer to the first end 11 is defined as a third end 1311, the end of each groove 131 closer to the second end 12 is defined as a fourth end 1312, and the width of each groove 131 in the circumferential direction is from The fourth end 1312 gradually expands toward the third end 1311, so that the two side walls of each recess 131 sandwich a first angle θ1, and the first angle θ1 is greater than 0 degrees and less than 90 degrees.

The present invention also provides an optical element (for example, a pressing ring 20), which is ring-shaped and has an inner ring surface. The inner ring surface is formed with a concave-convex section 21, and the concave-convex section 21 is provided with a plurality of concave grooves 211. The concave grooves 211 are arranged at intervals around an axial direction of the optical element. A convex rib 212 is formed between any two concave grooves 211. The two ends of each concave groove 211 in the axial direction are a fifth end 2111 and a first end respectively. Six ends 2112, the width of each groove 211 in a circumferential direction gradually expands from the sixth end 2112 to the fifth end 2111, so that the two side walls of each groove 211 sandwich a third angle θ3, and the third angle θ3 Greater than 0 degrees and less than 90 degrees.

The present invention further provides a lens module including a lens holder 10, at least one lens 30 and a pressure ring 20.

The lens mount 10 is cylindrical and has an inner ring surface, the inner ring surface encloses an accommodating space, the two ends of the lens mount 10 in the axial direction are respectively a first end 11 and a second end 12, the inner ring The surface near the first end 11 includes a stop section; the at least one lens 30 is disposed in the accommodating space and its outer ring surface is in contact with the inner ring surface of the lens mount 10; the pressure ring 20 is disposed in the accommodating space Is placed in the space and its outer ring faces the sealing section of the lens holder 10 to prevent the at least one lens 30 from falling out of the first end 11 of the lens holder 10; wherein, the sealing section and the pressure ring 20 are outside At least one of the annular surfaces includes a ring-shaped concave-convex section 13 provided with a plurality of concave grooves 131 for injecting an adhesive 40, and the concave grooves 131 are spaced around the axial direction of the lens mount 10 Is arranged, a convex rib 132 is formed between any two concave grooves 131. Preferably, the surface of each convex rib 132 is parallel to the axial direction; the end of each concave groove 131 closer to the first end 11 is defined as a The third end 1311, the end of each groove 131 closer to the second end 12 is defined as a fourth end 1312, and the width of each groove 131 in the circumferential direction gradually increases from the fourth end 1312 to the third end 1311 Expansion, so that the two side walls of each recess 131 sandwich a first angle θ1, the first angle θ1 is greater than 0 degrees and less than 90 degrees.

In this embodiment, the contour of each of the concave grooves 131 and 211 when viewed from the radial direction is an isosceles trapezoid (of course, the contour of each of the ribs 132 when viewed from the radial direction is also an isosceles trapezoid), that is to say If the first angle θ1 (or the third angle θ3) is divided into a first sub-angle θ11 and a second sub-angle θ12 in the axial direction, the first sub-angle θ11 and the second sub-angle θ12 are the same And respectively greater than 0 degrees and less than 45 degrees, preferably, the first angle θ1 (or the third angle θ3) is between 15 and 25 degrees; however, in other possible embodiments of the present invention, each of the concave The outline of the groove when viewed from the radial direction is a non-isosceles trapezoid, in other words, the first sub-angle is not equal to the second sub-angle; in addition, the maximum width of each groove 131, 211 in the circumferential direction 8 to 12 times the minimum width, that is, the width of each of the grooves 131, 211 at the third end 1311 (or the fifth end 2111) is approximately the same as that at the fourth end 1312 (or the sixth end). End 2112) is 8 to 12 times the width.

In addition, the bottom surface 1313 of each groove 131 is inclined with respect to the axial direction and sandwiches a second angle θ2 with the axial direction. The second angle θ2 is greater than 0 degrees and less than 45 degrees. Preferably, the second angle θ2 is between 3 degrees and 10 degrees; more specifically, in this embodiment, the radial depth of each groove 131 gradually increases from the fourth end 1312 toward the third end 1311, that is, Each of the grooves 131 gradually approaches the center axis of the lens holder 10 from the third end 1311 toward the fourth end 1312; on the other hand, the end of each of the convex ribs 132 close to the first end 11 forms an inclined guide surface 1321 The guide surface 1321 faces the first end 11 and the axial direction, which facilitates the insertion of the pressure ring 20.

In this embodiment, only the sealing section is provided with the concave-convex section 13 in the outer ring surface of the sealing section and the pressing ring 20. However, in other possible embodiments, it may be outside the pressing ring The ring surface is provided with the concave-convex section, or the sealing section and the outer ring surface of the pressure ring are respectively provided with the concave-convex section, and even, as shown in FIGS. 11 to 12, the lens mount 10 Next to the original concave-convex section 13 of the inner ring, another concave-convex section 14 is provided for dispersing stray light, and the original concave-convex section 13 is used to connect with the pressure ring 20; in addition, as shown in Figures 13 to 16 As shown, the lens mount 10" can have a concave-convex section 13' of different shapes, the concave groove 131' and the convex rib 132' form a wave-like extension, and the bottom surface 1313' of the concave groove 131' is also inclined with respect to the axial direction. A fourth angle θ4 is sandwiched with the axial direction. The fourth angle θ4 is greater than 0 degrees and less than 45 degrees, so that the radial depth of the groove 131 ′ gradually increases from the fourth end toward the third end.

With the above structure, when the concave-convex section is provided on the inner ring surface of the optical element or the inner ring surface of the lens mount, the sidewalls of the grooves are not parallel to the axial direction, that is, the grooves are not parallel to the axial direction. The distances from the different positions of the side walls to the optical axis are not the same, so it can effectively eliminate the influence of stray light on imaging, and the bottom surface of the groove is not parallel to the axis but is inclined, which can further disperse and reflect the stray light to avoid Affect the imaging; when the concave-convex section is set between the pressure ring and the lens mount, the concave groove can be used to inject the adhesive. Because the open end of the concave groove is wider and deeper, it is quite conducive to the injection of the adhesive. The inner side of the groove is narrow and shallow, which can prevent the adhesive from overflowing to the lens, and can maintain a larger rib surface, that is to say, it can increase the contact area between the pressure ring and the lens mount, and increase the frictional force. Ensure the tight fit and fixing effect of the two.

10, 10’, 10’’: lens mount 11: first end 12: second end 13, 13’: Concave-convex section 131, 131’: concave groove 1311: third end 1312: fourth end 1313, 1313’: bottom surface 132, 132’: convex rib 1321: guide surface 14: Bump section 20: pressure ring 21: Bump section 211: Groove 2111: Fifth end 2112: sixth end 212: Convex Rib 30: lens 40: Adhesive θ1: the first angle θ11: The first minute angle θ12: second minute angle θ2: second angle θ3: third angle θ4: The fourth angle

Fig. 1 is a perspective view of the lens module of the present invention. Figure 2 is a three-dimensional view of the lens mount and pressure ring of the present invention. Fig. 3 is a three-dimensional exploded view of the lens mount and pressure ring of the present invention. Fig. 4 is a front view of the lens module of the present invention. Fig. 5 is a cross-sectional view of the lens module of the present invention. Figure 6 is a cross-sectional view of the lens mount and pressure ring of the present invention. Fig. 7 is a partial side view of the concave-convex structure of the present invention. Fig. 8 is a partial enlarged view of Fig. 6. Fig. 9 is a partial perspective view of the concave-convex structure of the present invention. Figure 10 is a partial perspective view of the lens mount and pressure ring of the present invention. 11 is a perspective exploded view of the lens mount and pressure ring of the second embodiment of the present invention. Fig. 12 is a cross-sectional view of the second embodiment of the present invention. FIG. 13 is a three-dimensional exploded view of the lens mount and pressure ring of the third embodiment of the present invention. Fig. 14 is a cross-sectional view of the third embodiment of the present invention. Fig. 15 is a partial enlarged view of Fig. 14. Fig. 16 is a partial perspective view of the concave-convex structure of the third embodiment of the present invention.

10: Lens mount

13: Bump section

20: pressure ring

21: Bump section

Claims (18)

A lens holder is cylindrical and has an inner ring surface. The inner ring surface defines an accommodating space for accommodating at least one optical element. The two ends of the lens holder in the axial direction are respectively a first end and a second end, The inner ring surface includes a ring-shaped concave-convex section near the first end. The concave-convex section is provided with a plurality of concave grooves. The concave grooves are arranged at intervals around the axial direction of the lens mount. A convex rib is formed, the end of each groove closer to the first end is defined as a third end, the end of each groove closer to the second end is defined as a fourth end, and the width of each groove in the circumferential direction It gradually expands from the fourth end to the third end, so that the two side walls of each groove sandwich a first angle, and the first angle is greater than 0 degrees and less than 90 degrees. The lens holder according to claim 1, wherein the contour of each of the grooves when viewed from a radial direction is an isosceles trapezoid. The lens holder according to claim 1, wherein the contour of each of the grooves when viewed from a radial direction is a non-isosceles trapezoid. The lens holder according to claim 1, wherein the bottom surface of each of the recesses is inclined with respect to the axial direction and forms a second angle with the axial direction, and the second angle is greater than 0 degrees and less than 45 degrees. The lens holder according to claim 4, wherein the radial depth of each groove gradually increases from the fourth end toward the third end. The lens holder according to claim 1, wherein the end of each protruding rib close to the first end forms an inclined guide surface, and the guide surface faces the first end and the axial direction. The lens holder according to claim 5, wherein the contour of each of the recesses when viewed from a radial direction is an isosceles trapezoid, and the contour of each of the convex ribs when viewed from the radial direction is also an isosceles trapezoid; each of the convex ribs An end close to the first end forms an inclined guide surface, the guide surface faces the first end and the axial direction; the first angle is between 15 and 25 degrees, and the second angle is between 3 degrees and 10 The surface of each convex rib is parallel to the axial direction; the maximum width of each groove along the circumferential direction is 8 to 12 times the minimum width. An optical element is ring-shaped and has an inner ring surface. The inner ring surface is formed with a concave-convex section. The concave-convex section is provided with a plurality of concave grooves. The concave grooves are arranged at intervals around an axial direction of the optical element. A convex rib is formed between the two grooves. The two ends of each groove along the axial direction are respectively a fifth end and a sixth end. The width of each groove in the circumferential direction is from the sixth end to the fifth The ends are gradually expanded, so that the two side walls of each groove sandwich a third angle, and the third angle is greater than 0 degrees and less than 90 degrees. The optical element according to claim 8, wherein the contour of each of the grooves when viewed from a radial direction is an isosceles trapezoid. The optical element according to claim 8, wherein the contour of each of the grooves is a non-isosceles trapezoid when viewed from a radial direction. The optical element according to claim 9, wherein the contour of each of the convex ribs is also an isosceles trapezoid when viewed from the radial direction; the third angle is between 15 and 25 degrees; each of the grooves extends along the circumferential direction The maximum width is 8 to 12 times the minimum width. A lens module, including: A lens mount is cylindrical and has an inner ring surface, the inner ring surface encloses an accommodating space, the axial ends of the lens mount are respectively a first end and a second end, and the inner ring surface is close to the inner ring surface. Contains a stop section at the first end; At least one lens is arranged in the accommodating space and its outer ring surface is in contact with the inner ring surface of the lens holder; A pressure ring, which is arranged in the accommodating space and whose outer ring faces the sealing section of the lens holder to prevent the at least one lens from falling out from the first end of the lens holder; Wherein, at least one of the sealing section and the outer ring surface of the pressure ring includes a ring-shaped concave-convex section, the concave-convex section is provided with a plurality of grooves for injecting an adhesive, and the grooves surround the The lens mount is arranged at an axial interval, a convex rib is formed between any two grooves, the end of each groove closer to the first end is defined as a third end, and the end of each groove closer to the second end is defined as a third end. Defined as a fourth end, the width of each groove in a circumferential direction gradually expands from the fourth end to the third end, so that the two side walls of each groove sandwich a first angle, and the first angle is greater than 0 degrees. Less than 90 degrees. The lens module according to claim 12, wherein the contour of each of the grooves when viewed from a radial direction is an isosceles trapezoid. The lens module according to claim 12, wherein the contour of each of the grooves when viewed from a radial direction is a non-isosceles trapezoid. The lens module according to claim 12, wherein the bottom surface of each groove is inclined with respect to the axial direction and forms a second angle with the axial direction, and the second angle is greater than 0 degrees and less than 45 degrees. The lens module according to claim 15, wherein the radial depth of each groove gradually increases from the fourth end toward the third end. The lens module according to claim 12, wherein an end of each of the protruding ribs close to the first end forms an inclined guide surface, and the guide surface faces the first end and the axial direction. The lens module according to claim 16, wherein the contour of each groove when viewed from a radial direction is an isosceles trapezoid, and the contour of each convex rib when viewed from the radial direction is also an isosceles trapezoid; The end of the rib close to the first end forms an inclined guide surface facing the first end and the axial direction; the first angle is between 15 and 25 degrees, and the second angle is between 3 degrees and Between 10 degrees; the surface of each convex rib is parallel to the axial direction; the maximum width of each groove along the circumferential direction is 8 to 12 times the minimum width.

Images