CN210323530U

CN210323530U - Optical element with stray light eliminating structure

Info

Publication number: CN210323530U
Application number: CN201921217048.2U
Authority: CN
Inventors: 梁永福
Original assignee: Newmax Technology Co Ltd
Current assignee: Newmax Technology Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-04-14
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses an optical element with structure is eliminated to miscellaneous light, which comprises a body, this body is cyclic annular and defines an axial, this body has an interior anchor ring and an outer anchor ring, this body supplies to locate a lens mount inside and links with the inner wall of this lens mount with its outer anchor ring, this body is defined as a first end and a second end respectively along this ascending relative both ends of axial, this body is equipped with plural miscellaneous light in this interior anchor ring and eliminates the structure, these some miscellaneous light are eliminated the structure and are wound this axial interval arrangement, the surface that each miscellaneous light was eliminated the structure is not with the interior anchor ring coplanar of this body, each miscellaneous light is eliminated the structure and has a third end that is closer to this first end and a fourth end that is closer to this second end, each extension route that should miscellaneous light eliminate the structure does not coincide completely with the line of this third end and this fourth end. Based on the above structure of the utility model stray light can effectively be eliminated to the influence of formation of image.

Description

Optical element with stray light eliminating structure

Technical Field

The present invention relates to an optical device, and more particularly, to an optical device with a parasitic light eliminating structure.

Background

Generally, an optical device such as a lens is composed of optical elements such as a lens, and has a spacer ring or a press ring to fix the position of the lens, but since the whole lens is not used for effective imaging and other elements also cause light reflection, when the light is emitted to the position of the non-optical portion, stray light is formed, which may affect the imaging quality, so it should be avoided as much as possible.

In order to avoid stray light from affecting the image formation, stray light is generally dispersed by an uneven structure to avoid concentration of stray light, and as shown in taiwan patent nos. TW I612354, TW I616697, and TW I639029, a fine uneven structure is generally formed around the optical portion of the lens or at the inner ring surface of the spacer ring.

However, the conventional concave-convex structure has a uniform shape, such as concentric circular grooves, radial straight grooves, etc., and the direction of the formed reflection surface is uniform, and even there is a possibility of concentrating the stray light, and the effect of eliminating the stray light needs to be enhanced.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide an optical element with stray light eliminating structure, which can effectively eliminate the influence of stray light on imaging.

To achieve the above object, the present invention provides an optical device with stray light eliminating structure, which comprises a body, the body is annular and defines an axial direction, the body has an inner annular surface and an outer annular surface, the body is disposed inside a lens holder and is connected to the inner wall of the lens holder by the outer annular surface, the body is defined as a first end and a second end along the axial direction, the body is provided with a plurality of stray light eliminating structures on the inner annular surface, the stray light eliminating structures are arranged around the axial direction at intervals, the surface of each stray light eliminating structure is not coplanar with the inner annular surface of the body, each stray light eliminating structure has a third end closer to the first end and a fourth end closer to the second end, and the extending path of each stray light eliminating structure does not completely coincide with the connecting line between the third end and the fourth end.

To achieve the above object, the present invention further provides an optical element with parasitic light eliminating structure, which includes a body defining an axial direction, the body has an optical portion at a center thereof, and a light eliminating portion surrounding the optical portion is disposed at an outer side of the optical portion in a radial direction, the body is provided with a plurality of parasitic light eliminating structures at the light eliminating portion, the parasitic light eliminating structures are arranged at intervals around the axial direction, a surface of each parasitic light eliminating structure is not coplanar with the light eliminating portion of the body, each parasitic light eliminating structure has a third end closer to the optical portion and a fourth end farther from the optical portion, and an extending path of each parasitic light eliminating structure is not completely overlapped with a connecting line between the third end and the fourth end.

The utility model has the advantages that:

the utility model provides an optical element with structure is eliminated to miscellaneous light can effectively eliminate stray light to the influence of formation of image.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded perspective view of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

Fig. 4 is a schematic diagram of the stray light path according to the present invention.

Fig. 5 is a partial perspective view of the present invention.

Fig. 6 is a partial perspective view of a second embodiment of the present invention.

Fig. 7 is a partial perspective view of a third embodiment of the present invention.

Fig. 8 is a partial perspective view of a fourth embodiment of the present invention.

Fig. 9 is a partial perspective view of a fifth embodiment of the present invention.

Fig. 10 is a partial perspective view of a sixth embodiment of the present invention.

Fig. 11 is a partial perspective view of a seventh embodiment of the present invention.

Fig. 12 is a partial perspective view of an eighth embodiment of the present invention.

Fig. 13 is a partial perspective view of a ninth embodiment of the present invention.

Fig. 14 is a front view of a tenth embodiment of the present invention.

Fig. 15 is a partial perspective view of a tenth embodiment of the present invention.

Detailed Description

The following description is given by way of example only, and not by way of limitation, of the scope of the invention.

Referring to fig. 1 to 13, the present invention provides an optical element with stray light eliminating structure, including a

body

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h (such as a pressing ring, a spacing ring 30, etc.), the

body

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h being annular to define an axial direction, the

body

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h having an inner annular surface 11 and an outer annular surface 12, the

body

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h being provided inside a lens holder 20 and being connected to an inner wall of the lens holder 20 by the outer annular surface 12, the

body

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h being defined as a first end 102 along an opposite end of the axial direction, the

main body

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h is provided with a plurality of stray

light eliminating structures

13, 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h on the inner annular surface 11, the stray

light eliminating structures

13, 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h are arranged around the axial direction at intervals, the surfaces of the stray

light eliminating structures

13, 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h are not coplanar with the inner annular surface 11 of the main body, the stray

light eliminating structures

13, 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h have a third end closer to the first end 101 and a fourth end closer to the second end 102, and the stray

light eliminating structures

13, 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h have a fourth end closer to the second end 102, and the stray

light eliminating structures

13, 13a, 13b, 13c, 13d, 13e, 13, 13h does not completely coincide with the line connecting the third end and the fourth end.

In the main embodiment of the present invention, each of the parasitic

light elimination structures

13, 13a, 13b is substantially S-shaped and is a groove, as shown in fig. 5 to 7; however, in other embodiments of the present invention, each of the parasitic

light elimination structures

13f, 13g, and 13h may be a v-shaped groove, as shown in fig. 11 to 13, preferably, each of the parasitic

light elimination structures

13c, 13d, and 13e includes two segments connected to each other, the two segments form an angle, and the angle is not equal to 180 degrees; each of the parasitic

light removal structures

13c, 13d, and 13e may be a zigzag groove, as shown in fig. 8 to 10, preferably, each of the parasitic

light removal structures

13f, 13g, and 13h includes at least three segments connected to each other in a staggered manner, and any two adjacent segments form an angle, and the angle is not equal to 180 degrees.

As for the shape of the groove, in the main embodiment of the present invention, the radial cross section of the groove (the veiling

glare elimination structure

13, 13c, 13f) is a trapezoid with a narrow bottom and a wide opening, as shown in fig. 5, 8, 11 (a rib is formed between any two grooves, and the radial cross section of the rib is also a trapezoid with a narrow top surface); in other possible embodiments of the present invention, the radial cross-section of the groove (the parasitic

light eliminating structure

13a, 13d, 13g) is an inverted triangle, as shown in fig. 6, 9, 12 (a rib is formed between any two grooves, and the radial cross-section of the rib is a triangle); the radial cross section of the bottom of the groove (the parasitic

light eliminating structure

13b, 13e, 13h) may also be concave arc, as shown in fig. 7, 10, 13 (a convex rib is formed between any two grooves, and the radial cross section of the convex rib is convex arc).

As shown in fig. 14 and 15, the present invention further provides an optical device with a parasitic light elimination structure, which includes a disc-shaped body 10' (such as a lens), the body 10 'defines an axial direction, the body 10' having an optic 14 (actually for light to pass through for shaping) in its center, and has a light-extinction portion 15 surrounding the optical portion 14 on the radially outer side of the optical portion 14, the body 10 'is provided with a plurality of stray light eliminating structures 13 on the extinction part 15, the stray light eliminating structures 13 are arranged at intervals around the axial direction, the surface of each stray light eliminating structure 13 is not coplanar with the extinction part 15 of the body 10', each stray light eliminating structure 13 is provided with a third end closer to the optical part 14 and a fourth end farther from the optical part 14, and the extending path of each stray light eliminating structure 13 is not completely overlapped with the connecting line of the third end and the fourth end.

In the present embodiment, each stray light eliminating structure 13 is substantially S-shaped and is a groove, and the radial cross section of the groove (stray light eliminating structure 13) is a trapezoid with a narrow bottom and a wide opening, however, as mentioned above, in other possible embodiments, each stray light eliminating structure may be any non-linear shape such as a doglegged shape or a doglegged shape, and the radial cross section of the groove may be other shapes such as an arc shape or an inverted triangle.

In practical use, as shown in fig. 4, when the optical element is installed in the lens mount and actually performs imaging, the stray light eliminating structures 13 provide many surfaces that are not parallel to the inner annular surface of the body to reflect stray light, and the stray light eliminating structures 13 are not straight lines, that is, the inner side surfaces of the stray light eliminating structures 13 are also not flat surfaces, and at least have two planes with different directions, so that the directions of the reflecting surfaces are more diversified, and stray light can be scattered more evenly, thereby avoiding affecting imaging.

To sum up, the utility model provides an optical element has nonlinear parasitic light and eliminates the structure, can provide the stray light reflecting surface of various directions, makes stray light by the reflection of more dispersion, avoids gathering stray light and influence the formation of image, and the effect is outstanding, has the effect of progress.

The above description is the preferred embodiment of the present invention and the technical principle applied by the preferred embodiment, and for those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes based on the equivalent transformation, simple replacement, etc. of the technical solution of the present invention all belong to the protection scope of the present invention.

Claims

1. An optical element with stray light eliminating structure is prepared as setting body in lens holder and connecting said body to internal wall of lens holder by external ring surface, defining two opposite ends of said body along axial direction as the first end and the second end separately, setting multiple stray light eliminating structures on internal ring surface of said body, arranging said stray light eliminating structures around said axial direction at intervals, setting surface of each stray light eliminating structure not to be in same plane with internal ring surface of said body and setting each stray light eliminating structure to have the third end near to the first end and the fourth end near to the second end and setting extension path of each stray light eliminating structure not to be completely coincident with connection line of the third end and the fourth end.

2. The optical device according to claim 1, wherein each of the parasitic light elimination structures has a substantially doglegged shape.

3. An optical device as claimed in claim 1, wherein each parasitic light elimination structure is substantially S-shaped.

4. An optical device as claimed in claim 1, wherein each parasitic light elimination structure is substantially in the shape of a broken line.

5. The optical device as claimed in claim 2, wherein each parasitic light elimination structure comprises two segments connected to each other, the two segments form an angle, and the angle is not equal to 180 °.

6. The optical device as claimed in claim 4, wherein each of the parasitic light elimination structures comprises at least three segments interlaced with each other, any two adjacent segments form an angle, and the angle is not equal to 180 °.

7. An optical device as claimed in any one of claims 1 to 6, wherein each parasitic light elimination structure is a groove, and the radial cross section of the bottom of the groove is substantially concave-arc-shaped.

8. An optical device as claimed in any one of claims 1 to 6, wherein each parasitic light removal structure is a groove having an inverted triangular radial cross-section.

9. An optical device as claimed in any one of claims 1 to 6, wherein each of the parasitic light eliminating structures is a groove, and the radial cross section of the groove is trapezoidal with a narrower bottom and a wider opening.

10. An optical element with stray light eliminating structure is featured as setting multiple stray light eliminating structures on extinction unit, arranging multiple stray light eliminating structures around axial direction at intervals, setting surface of each stray light eliminating structure not to be in same plane as that of extinction unit on body, setting a third end closer to optical unit and a fourth end farther from optical unit for each stray light eliminating structure and enabling extension path of each stray light eliminating structure not to be completely coincident with connection line of third end and fourth end.

11. The optical device according to claim 10, wherein each of the parasitic light elimination structures has a substantially doglegged shape.

12. The optical device as claimed in claim 10, wherein each of the parasitic light elimination structures is substantially S-shaped.

13. The optical device as claimed in claim 10, wherein each of the parasitic light elimination structures is substantially in the shape of a broken line.

14. The optical device as claimed in claim 11, wherein each of the parasitic light elimination structures comprises two segments connected to each other, the two segments having an angle, the angle is not equal to 180 °.

15. The optical device as claimed in claim 13, wherein each of the parasitic light elimination structures comprises at least three segments interlaced with each other, any two adjacent segments form an angle, and the angle is not equal to 180 °.

16. An optical device as claimed in any one of claims 10 to 15, wherein each parasitic light elimination structure is a groove, and the radial cross section of the bottom of the groove is substantially concave-arc-shaped.

17. An optical device as claimed in any one of claims 10 to 15, wherein each parasitic light removal structure is a groove having an inverted triangular radial cross-section.

18. An optical device as claimed in any one of claims 10 to 15, wherein each of the parasitic light eliminating structures is a groove, and the radial cross section of the groove is trapezoidal with a narrower bottom and a wider opening.