CN213240573U

CN213240573U - Dioptric element and camera lens group thereof

Info

Publication number: CN213240573U
Application number: CN202021766868.XU
Authority: CN
Inventors: 张芳; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-05-18
Anticipated expiration: 2030-08-21

Abstract

The utility model relates to a refraction component and camera lens group thereof, wherein, refraction component, include: the light source comprises a main body (11), an incidence surface (111), a reflection surface (112), an emergence surface (113) and end surfaces (114) which are sequentially connected along the circumferential direction of the main body (11), wherein the end surfaces are respectively arranged at two ends of the main body (11); an extinction region (115) is provided on at least one of the incident surface (111) and the exit surface (113); along the circumference of the main body (11), the extinction areas (115) are respectively arranged at the edge positions of the surface on which the extinction areas are arranged on the same surface. The extinction area is arranged on the incident surface and/or the emergent surface, so that stray light can be effectively reduced under the condition that imaging light normally passes through, and imaging quality is improved.

Description

Dioptric element and camera lens group thereof

Technical Field

The utility model relates to the field of optical technology, especially, relate to a refraction component and camera lens group thereof.

Background

With the advancement of science and technology and the development of economy, people have higher requirements on the camera function of portable electronic equipment, such as tablet computers, video cameras, smart phones and the like. Meanwhile, the demand of the market for the camera module of the electronic equipment is increasing day by day, the competition of the camera module of the electronic equipment is becoming fierce, and particularly the design demand for the periscopic lens is also becoming higher and higher. The refractive element, i.e. the prism, as one of the common and important components in the periscopic lens for changing the proceeding direction of the light beam, usually brings a series of problems, especially the increase of stray light, which seriously affects the imaging quality of the camera module.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a refraction component and camera lens group thereof solves the stray light and influences the problem of formation of image.

To achieve the above object, the present invention provides a refraction element, including: the reflecting mirror comprises a main body, an incident surface, a reflecting surface, an emergent surface and end surfaces, wherein the incident surface, the reflecting surface and the emergent surface are sequentially connected along the circumferential direction of the main body;

an extinction area is arranged on at least one of the incident surface and the emergent surface;

along the circumference of the main body, the edge positions of the extinction areas on the same surface are respectively arranged.

According to an aspect of the utility model, follow the circumference of main part, the regional one side of extinction coincides with the edge of place face, and the another side is the wavy limit that broken line or curve constitute.

According to one aspect of the present invention, the matte region is a matte layer coated on the surface; or the extinction area is a rough structure arranged on the surface; alternatively, the matt area is a combination of a matt layer and a rough structure.

According to an aspect of the present invention, the extinction area has a convex plate protruding from a surface thereof, and the convex plate is coated with an extinction layer or provided with a rough structure or a combination of the extinction layer and the rough structure on the surface.

According to the utility model discloses an aspect, the regional maximum thickness H of extinction satisfies: h is more than or equal to 0.003mm and less than or equal to 0.05 mm.

According to an aspect of the utility model, the maximum distance C1 between the regional relative both sides of extinction satisfies: c1 is more than or equal to 0.05 mm.

According to one aspect of the present invention, the wavy edge has protruding portions and recessed portions which are staggered with each other; wherein, the maximum depth of depressed part is d, and the width between the adjacent depressed part is W, then satisfy: d/W is more than or equal to 0.25 and less than or equal to 0.6.

According to the utility model discloses an aspect, the wavy limit adopts the broken line to constitute, and the opening angle theta of its depressed part satisfies: theta is more than or equal to 20 degrees and less than or equal to 160 degrees.

According to the utility model discloses an aspect, the quantity of depressed part is N, then satisfies: n is more than or equal to 5 and less than or equal to 60.

According to one aspect of the present invention, the surface provided with the extinction area is a rectangular surface, and the short side of the rectangular surface coincides with the edge of the end surface and the long side coincides with one side of the extinction area;

the short side dimension is A, and the long side dimension is B, then satisfy: b is more than or equal to A and A/B is more than or equal to 0.3 and less than or equal to 1.

According to the utility model discloses an aspect, the biggest distance C1 between the regional relative both sides of extinction satisfies with the minor face size A of its place face: C1/A is more than or equal to 0.01 and less than or equal to 0.3.

In order to achieve the above object, the present invention provides a camera lens assembly of the above mentioned refraction element, including: a refractive element and at least one optic;

the emergent surface of the refraction element is opposite to the lens.

According to the utility model discloses a scheme is provided with the extinction region on incident surface and/or emergent surface, can effectively reduce stray light under the circumstances of guaranteeing that imaging light normally passes through, promotes the formation of image quality.

According to the utility model discloses a scheme is regional through setting up the extinction on plane of reflection and/or emergent face, can be in like this the utility model discloses a refraction element can effectively destroy the stray light reflection path on the transmission light path through the extinction region in the in-process of light transmission in the light path, has reduced stray light reflection area and reflection intensity.

According to the utility model discloses a scheme, the coincidence setting that flushes mutually with the edge of face on one side of extinction region, can make the extinction region reach complete the covering to border position like this, and is favorable to avoiding the incident of unnecessary light.

Through the arrangement, one side of the edge of the extinction area, which is far away from the surface, is set to be a wavy side, so that a protruding and sunken staggered micro structure is formed at the edge of the extinction area, the micro structure is favorable for further effectively damaging the reflection path of the stray light, and the effect of reducing the reflection intensity of the stray light is better.

Drawings

FIG. 1 is a perspective view schematically illustrating a refractive element according to one embodiment of the present invention;

FIG. 2 is a side view schematically illustrating a refractive element according to one embodiment of the present invention;

FIG. 3 is a top view schematically illustrating the surface of a matte region according to an embodiment of the present invention;

FIG. 4 is a partial enlarged view schematically illustrating a matte region according to an embodiment of the present invention;

fig. 5 is a partial enlarged view schematically illustrating a light extinction area according to another embodiment of the present invention;

fig. 6 is a structural view schematically showing a photographing lens group according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

Referring to fig. 1 and 2, according to an embodiment of the present invention, the present invention provides a refraction element, comprising: the light source device includes a main body 11, an incident surface 111, a reflecting surface 112 and an emitting surface 113 connected in sequence along a circumferential direction of the main body 11, and end surfaces 114 provided at both ends of the main body 11, respectively. In the present embodiment, the body 11 is a prism as a whole. In the present embodiment, the body 11 is formed as a triangular prism as a whole, and end faces 114 at opposite ends thereof are flat surfaces having uniform shapes and sizes. In the present embodiment, the cross section 114 is an isosceles right triangle. The incident surface 111, the reflecting surface 112 and the exit surface 113 are connected in sequence and are respectively connected with the edge of the end surface 114. In the present embodiment, a light extinction region 115 is provided on at least one of the incident surface 111 and the emission surface 113; that is, the light extinction region 115 may be provided on the incident surface 111 or the emission surface 113, or may be provided on both the incident surface 111 and the emission surface 113. In the present embodiment, the light extinction regions 115 are provided at the edge positions of the surface on the same plane in the circumferential direction of the body 11.

According to the utility model discloses, through set up the regional 115 of extinction on plane of reflection 112 and/or emitting surface 113, can be in like this the utility model discloses a refraction element can effectively destroy the stray light reflection path on the transmission light path through the regional 115 of extinction in the in-process of transmission light in the light path, has reduced stray light reflection area and reflection intensity.

Referring to fig. 1, 2 and 3, according to an embodiment of the present invention, along the circumferential direction of the main body 11, one side of the extinction region 115 coincides with the edge of the surface where the extinction region is located, and the other side is a wavy side formed by a broken line or a curved line. In the present embodiment, the wavy edge has protruding portions 115a and recessed portions 115b arranged to be staggered with each other. In the present embodiment, the protruding portion 115a and the recessed portion 115b may be respectively in a regular form (e.g., a triangle, a rectangle, a trapezoid, an arc, etc.) in which the shape and size are kept consistent, or in an irregular form in which the shape and size may be randomly changed.

Through the arrangement, one side of the extinction area 115 is overlapped and arranged in a flush mode with the edge of the surface where the extinction area is located, so that the extinction area 115 can completely cover the edge position, and the extinction area is beneficial to avoiding incidence of redundant light rays.

Through the arrangement, one side of the edge of the extinction area 115, which is far away from the surface, is set as a wavy side, so that a protruding and sunken staggered micro structure is formed at the edge of the extinction area 115, and the micro structure is favorable for further effectively damaging the reflection path of the stray light, and further has a better effect of reducing the reflection intensity of the stray light.

Referring to fig. 1, 2 and 3, according to an embodiment of the present invention, the light extinction region 115 is implemented on the main body 11 through a post-treatment process. In the present embodiment, the matte region 115 is a matte layer coated on the surface thereof; in this embodiment, the light extinction region 115 may be a black light extinction layer formed by coating a black light extinction material on the surface. According to another embodiment of the present invention, the light extinction area 115 is a rough structure disposed on the surface; in this embodiment mode, the roughness structure can be formed by directly performing treatment on the surface by etching or etching. The suppression of the reflection path and the reflection intensity of the light is also realized by the arranged rough structure. According to another embodiment of the present invention, the matte region 115 is a combination of a matte layer and a rough structure, for example, the rough structure may be formed on the surface, and the matte layer formed by a matte material may be attached to the rough structure. It is of course also possible to provide the matt layers and the roughness structures alternately in one direction (for example the width or length direction of the matt areas) on the surface.

Through the aforesaid setting, can directly form this extinction region that has certain thickness on the plane of reflection of main part 11 and/or incident, its simple structure and setting form are various, make the utility model discloses a refraction element can carry out selective setting according to specific needs, makes the utility model discloses a refraction element's performance is more excellent, and imaging quality is higher.

According to an embodiment of the present invention, the light extinction region 115 is implemented on the main body 11 through a post-treatment process. In the present embodiment, the extinction region 115 has a projection protruding from the surface thereof, and the surface of the projection is coated with an extinction layer or provided with a rough structure or a combination of an extinction layer and a rough structure. In this embodiment, the boss may be formed of the same material as the body 11, or may be formed of other materials so as to form a matte layer or a rough structure. In addition, the formation of the extinction layer and the roughness structure is the same as the above-mentioned manner, and the details are not repeated herein.

Through the aforesaid setting, can directly form this extinction region that has certain thickness on the plane of reflection of main part 11 and/or incident, its simple structure and setting form are various, make the utility model discloses a refraction element can carry out selective setting according to specific needs, makes the utility model discloses a refraction element's performance is more excellent, and imaging quality is higher. In addition, in this scheme, can effectively reduce the shaping thickness and the dimensional accuracy (like the thickness precision) of extinction layer and/or coarse structure through setting up the boss, be favorable to improving like this the utility model discloses a finished product yield.

With reference to fig. 1 and 2, according to an embodiment of the present invention, the maximum thickness H of the extinction area 115 satisfies: h is more than or equal to 0.003mm and less than or equal to 0.05 mm.

Through the arrangement, the technological stability of the extinction area 115 in the forming process and the effectiveness of stray light inhibition are guaranteed.

As shown in fig. 1 and 3, according to an embodiment of the present invention, the maximum distance C1 between two opposite sides of the extinction area 115 satisfies: c1 is more than or equal to 0.05 mm.

Through the arrangement, the technological stability of the extinction area 115 in the forming process and the effectiveness of stray light inhibition are guaranteed. In addition, the biggest luminous flux of incident surface and/or emergent surface has still been guaranteed effectively, to guaranteeing the utility model discloses a use validity is favorable to and it is favorable to improving its imaging quality.

Referring to fig. 1 and 4, according to an embodiment of the present invention, the wavy edge has protruding portions 115a and recessed portions 115b alternately disposed. In the present embodiment, when the maximum depth of the recessed portions 115b is d and the width between adjacent recessed portions 115b is W, the following is satisfied: d/W is more than or equal to 0.25 and less than or equal to 0.6.

Through the arrangement, the stray light reflection path can be better changed in the extinction area, and the reduction of the reflection intensity of the reflected light and the influence on the imaging quality are facilitated.

Referring to fig. 1, 3 and 4, according to an embodiment of the present invention, the wavy edge is formed by a broken line, and the opening angle θ of the concave portion 115b satisfies: theta is more than or equal to 20 degrees and less than or equal to 160 degrees.

Referring to fig. 1 and 3, according to an embodiment of the present invention, the number of the concave portions 115b is N, and satisfies: n is more than or equal to 5 and less than or equal to 60.

Through the arrangement, under the same inner ring surface caliber, the depth and the width of the corresponding micro-structures are good for the effect of simulating the stray light when the number of the micro-structures is within the range of 5-60.

As shown in fig. 1, 3, and 4, according to one embodiment of the present invention, the surface (e.g., the incident surface and the emitting surface) on which the extinction area 115 is disposed is a rectangular surface, and the short side of the rectangular surface coincides with the edge of the end surface 114 and the long side coincides with one side of the extinction area 115. In the present embodiment, the short side dimension is a and the long side dimension is B, which satisfy: b is more than or equal to A and A/B is more than or equal to 0.3 and less than or equal to 1.

With reference to fig. 1, 3 and 4, according to an embodiment of the present invention, the maximum distance C1 between two opposite sides of the extinction area 115 and the short side dimension a of the surface on which it is located satisfy: C1/A is more than or equal to 0.01 and less than or equal to 0.3.

According to an embodiment of the present invention, the material of the refraction element is transparent, which may be glass or plastic.

With reference to fig. 1 and 6, according to an embodiment of the present invention, the present invention provides a camera lens assembly using the above-mentioned refraction element, including: a refractive element 1 and at least one optic 2. In the present embodiment, the exit surface 113 of the dioptric element 1 is disposed opposite to the lens 2. In the present embodiment, the lens 2 may be implemented in a housing.

For further detailed description of the present invention, the present invention is exemplified by the accompanying drawings.

The utility model discloses a refraction element, include: the light source device includes a main body 11, an incident surface 111, a reflecting surface 112 and an emitting surface 113 connected in sequence along a circumferential direction of the main body 11, and end surfaces 114 provided at both ends of the main body 11, respectively. In the present embodiment, the body 11 has a triangular prism shape as a whole. The entrance surface 111 and the exit surface 113 of the extinction area 115 are rectangular, and the long side dimension B is 6.5mm, and the short side dimension a is 4.5mm, so that the following requirements are met: b is more than or equal to A, and A/B is 0.69. In the present embodiment, the end surface 114 is an isosceles right triangle.

In the present embodiment, the extinction regions 115 are symmetrically disposed on the surface, and one side of the extinction regions close to the surface coincides with the edge of the surface, and the other side is a wavy side. In the present embodiment, the wavy side is formed by a folding line, and has a protruding portion 115a and a recessed portion 115b, the recessed portion 115b is an isosceles triangle, wherein the maximum depth of the recessed portion 115b is d, and the width of two adjacent recessed portions 115b is W, which satisfies: d/W is 0.5; the opening angle θ of the recess 115b is 60 °, and the reflection path of stray light can be changed more favorably.

In the present embodiment, the maximum distance between the wavy side and the overlapping side (i.e., the side overlapping the surface) of the extinction region 115 is C1 equal to 0.3mm, and satisfies C1/a equal to 0.067,

in the present embodiment, the maximum thickness of the extinction region 115 is H, and satisfies: h is 0.01 mm. Through the arrangement, the process stability and the veiling glare effectiveness are facilitated.

In the present embodiment, the refractive element material is glass or plastic, and is transparent.

The foregoing is merely exemplary of embodiments of the present invention and reference should be made to the apparatus and structures herein not described in detail as it is known in the art to practice the same in general equipment and general methods.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A refractive element, comprising: the light source comprises a main body (11), an incidence surface (111), a reflection surface (112), an emergence surface (113) and end surfaces (114) which are sequentially connected along the circumferential direction of the main body (11), wherein the end surfaces are respectively arranged at two ends of the main body (11);

an extinction region (115) is provided on at least one of the incident surface (111) and the exit surface (113);

along the circumference of the main body (11), the extinction areas (115) are respectively arranged at the edge positions of the surface on which the extinction areas are arranged on the same surface.

2. The refractive element of claim 1, wherein, in the circumferential direction of the body (11), one side of the light-extinction region (115) coincides with the edge of the surface on which it is disposed, and the other side is a wavy side formed by a broken line or a curved line.

3. The refractive element of claim 2, wherein the matt area (115) is an matt layer coated on the face; or the extinction area (115) is a rough structure arranged on the surface; alternatively, the matt area (115) is a combination of a matt layer and a rough structure.

4. The refractive element according to claim 2, characterized in that the light-extinction area (115) has a projection which projects out of the surface on which it is situated, and on the surface of which projection a light-extinction layer is coated or provided with a roughness structure or a combination of a light-extinction layer and a roughness structure.

5. The refractive element according to any one of claims 1 to 4, characterized in that the maximum thickness H of the extinction area (115) satisfies: h is more than or equal to 0.003mm and less than or equal to 0.05 mm.

6. The refractive element of claim 5, wherein the maximum distance C1 between the opposite sides of the extinction area (115) is such that: c1 is more than or equal to 0.05 mm.

7. The refractive element of any of claims 2 to 4, wherein the wavy edge has protrusions (115a) and recesses (115b) arranged alternately with one another; wherein, the maximum depth of the concave parts (115b) is d, and the width between the adjacent concave parts (115b) is W, then the following conditions are satisfied: d/W is more than or equal to 0.25 and less than or equal to 0.6.

8. The refractive element of claim 7, wherein the wavy edge is formed by a fold line, and the opening angle θ of the concave portion (115b) satisfies: theta is more than or equal to 20 degrees and less than or equal to 160 degrees.

9. The refractive element of claim 7, wherein the number of recesses (115b) is N such that: n is more than or equal to 5 and less than or equal to 60.

10. The refractive element of claim 6, wherein the face provided with the extinction area (115) is a rectangular face, and the short side of the rectangular face coincides with the edge of the end face (114) and the long side coincides with one side of the extinction area (115);

11. The refractive element of claim 10, wherein the maximum distance C1 between the two opposite sides of the extinction area (115) and the dimension a of the short side of the surface on which it is disposed satisfy: C1/A is more than or equal to 0.01 and less than or equal to 0.3.

12. An image pickup lens group using the refractive element according to any one of claims 1 to 11, comprising: a refractive element (1) and at least one lens (2);

the exit surface (113) of the refraction element (1) is arranged opposite to the lens (2).