CN212933025U - Shading element and optical imaging lens - Google Patents

Abstract

The utility model provides a shading element and optical imaging lens. The shading element is annular, and the shading element includes to the direction that is close to the optical axis: assembling the bearing part; the stray light improving part is arranged on the inner ring surface of the assembly bearing part, the stray light improving part and the assembly bearing part are integrally formed, and the object side surface of the stray light improving part obliquely extends out from the inner ring surface to the direction close to the image side surface of the stray light improving part; and the light absorption film layer is arranged on the stray light improving part. The utility model provides a shading element among the prior art have the parasitic light to improve the problem of difficulty.

Description

Shading element and optical imaging lens

Technical Field

The utility model relates to an optical imaging equipment technical field particularly, relates to a shading element and optical imaging camera lens.

Background

With the rapid development of science and technology, people have higher and higher requirements on the quality of the camera lens, and the conventional annular optical element is usually manufactured by a black material injection molding method, and the surface of the conventional annular optical element is smooth and bright and has higher reflectivity, so that the stray light intensity of the stray light incident on the reflecting surface cannot be effectively attenuated, the stray light is reflected to the imaging surface, and the imaging quality of the lens is further influenced.

That is, the light shielding member in the related art has a problem that improvement of stray light is difficult.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a shading element and an optical imaging lens, which solve the problem of the shading element in the prior art that the stray light is difficult to improve.

In order to achieve the above object, according to an aspect of the present invention, there is provided a light shielding member, the light shielding member being annular, the light shielding member including to a direction close to an optical axis: assembling the bearing part; the stray light improving part is arranged on the inner ring surface of the assembly bearing part, the stray light improving part and the assembly bearing part are integrally formed, and the object side surface of the stray light improving part obliquely extends out from the inner ring surface to the direction close to the image side surface of the stray light improving part; and the light absorption film layer is arranged on the stray light improving part.

Furthermore, the object side surface of the stray light improving part is transitionally connected with the image side surface of the stray light improving part in the direction close to the optical axis.

Further, the image side surface of the stray light improving portion includes: the straight edge surface is connected with the image side surface of the assembling bearing part and is vertical to the inner ring surface; the straight edge surface is connected with the object side surface of the stray light improving part through the transition surface, and the transition surface extends from the straight edge surface to the direction close to the object side surface of the stray light improving part in an inclined mode.

Furthermore, the object side surface and the transition surface of the stray light improving part are provided with light absorbing film layers.

Furthermore, the roughness of the object side surface and the transition surface of the stray light improving part is more than or equal to 1.0 micron.

Further, the surface roughness of the light absorption film layer is less than or equal to 1.0 micron.

Further, the thickness of the light absorption film layer is more than or equal to 200 nanometers and less than or equal to 1000 nanometers.

Further, the distance A between the outer ring surface and the inner ring surface of the assembly bearing part is more than or equal to 0.2 mm and less than or equal to 3 mm.

Further, the distance B between the object side surface of the assembly receiving part and the image side surface of the assembly receiving part is more than or equal to 0.2 mm and less than or equal to 3 mm.

According to the utility model discloses an on the other hand provides an optical imaging lens, include: a lens barrel; the lens comprises a plurality of lenses which are arranged at intervals along the optical axis direction of the lens barrel; at least one shading element is arranged between two adjacent lenses.

By applying the technical scheme of the utility model, the shading element is annular, the shading element comprises an assembly bearing part, a parasitic light improving part and a light absorption film layer towards the direction close to the optical axis, the parasitic light improving part is arranged on the inner annular surface of the assembly bearing part, the parasitic light improving part and the assembly bearing part are integrally formed, and the object side surface of the parasitic light improving part obliquely extends out from the inner annular surface towards the direction close to the image side surface of the parasitic light improving part; the light absorbing film layer is disposed on the stray light improving part.

Through setting up shading element and circularizing for shading element can carry out the butt to lens and spacer, can avoid shading element to shelter from the imaging light of lens simultaneously, guarantees that lens can clear formation of image. The stray light improving part is arranged on the inner annular surface of the assembly receiving part, so that the stray light improving part can absorb light rays emitted onto the inner annular surface, reflection of the light rays on the inner annular surface is reduced, stray light is improved, and imaging quality can be effectively guaranteed. The stray light improving part and the assembly bearing part are integrally formed, so that the pressure transmitted to the stray light improving part by the lens in the assembling process is directly applied to the assembly bearing part, the stray light improving part is prevented from being deformed due to the pressure of the lens, the structural strength of the stray light improving part is ensured, the stray light improving part and the assembly bearing part are connected by adopting an integrally forming method, the assembly between the shading element and the lens barrel is easier to operate, the assembly between the shading element and the lens barrel is further more stable, and the structural strength between the shading element and the lens barrel is ensured. The stray light improving part and the assembly bearing part are integrally formed, so that the stray light improving part and the assembly bearing part can be tightly connected, the structural strength of the shading element is enhanced, and the possibility of deformation of the shading element is reduced. The light absorption film layer is arranged on the stray light improving part, so that the absorption of light can be increased, and the generation of stray light is reduced.

The object side surface of the stray light improving part obliquely extends out from the inner ring surface to the direction close to the image side surface of the stray light improving part, so that the image side surface of the stray light improving part plays a role in bearing and protecting the lens, and the stability of bearing the lens in the assembling process is ensured. In addition, the object side face of the stray light improving portion is obliquely extended out from the inner ring face to the direction close to the image side face of the stray light improving portion, so that the inner ring face of the stray light improving portion can receive light emitted into the inner ring face at different angles, further more stray light can be absorbed by the inner ring face of the stray light improving portion, the purpose of improving the stray light is achieved, meanwhile, the stray light improving portion can be guaranteed not to shield imaging light, and the stability of imaging is guaranteed.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of an alternative embodiment of an optical imaging lens of the present invention; and

FIG. 2 shows a schematic view of the shading element of FIG. 1;

FIG. 3 shows a schematic view of the shading element of FIG. 1;

FIG. 4 shows a close-up view of the shading element of FIG. 1;

FIG. 5 shows a close-up view of the shading element of FIG. 1;

fig. 6 is a schematic diagram showing the matching relationship between the shading element and the two-color injection mold in fig. 1.

Wherein the figures include the following reference numerals:

10. a light shielding member; 11. assembling the bearing part; 111. an inner ring surface; 12. a stray light improving section; 121. a straight side surface; 122. a transition surface; 123. a light absorbing film layer; 20. a lens; 30. a space ring; 40. a spacer; 50. a lens barrel; 60. an optical axis.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the shading element in the prior art has the veiling glare to improve the difficulty, the utility model provides a shading element.

As shown in fig. 1 to 6, the light shielding element 10 is ring-shaped, the light shielding element 10 includes an assembly receiving portion 11, a stray light improving portion 12 and a light absorbing film layer 123 in a direction close to the optical axis 60, the stray light improving portion 12 is disposed on an inner ring surface 111 of the assembly receiving portion 11, the stray light improving portion 12 is integrally formed with the assembly receiving portion 11, and an object side surface of the stray light improving portion 12 extends from the inner ring surface 111 in an inclined manner in a direction close to an image side surface of the stray light improving portion 12; the light absorbing layer 123 is provided on the stray light improving part 12.

Through setting up shading element 10 annularly for shading element 10 can carry out the butt to lens 20 and spacer 40, can avoid shading element 10 to shelter from the imaging light of lens 20 simultaneously, guarantees that lens 20 can clearly image. The stray light improving part 12 is arranged on the inner annular surface 111 of the assembly receiving part 11, so that the stray light improving part 12 can absorb light rays emitted onto the inner annular surface 111, the reflection of the light rays on the inner annular surface 111 is reduced, the generation of stray light is reduced, the stray light generated by the shading element 10 is improved, and the imaging quality can be effectively ensured. The stray light improving part 12 and the assembly bearing part 11 are integrally formed, so that the pressure transmitted to the stray light improving part 12 by the lens 20 in the assembling process is directly applied to the assembly bearing part 11, the stray light improving part 12 is prevented from being deformed by the pressure of the lens 20, the structural strength of the stray light improving part 12 is ensured, the stray light improving part 12 and the assembly bearing part 11 are connected by adopting an integrally forming method, the assembly between the shading element 10 and the lens barrel 50 is easier to operate, the assembly between the shading element 10 and the lens barrel 50 is further more stable, and the structural strength between the shading element 10 and the lens barrel 50 is ensured. The stray light improving part 12 and the assembly receiving part 11 are integrally formed, so that the stray light improving part 12 and the assembly receiving part 11 can be tightly connected, the structural strength of the shading element 10 is enhanced, and the possibility of deformation of the shading element 10 is reduced. By providing the light-absorbing layer 123 on the stray light improving portion 12, the absorption of light by the stray light improving portion 12 can be increased, so as to reduce the generation of stray light.

The object side surface of the stray light improving part 12 extends from the inner ring surface 111 to the direction close to the image side surface of the stray light improving part 12 in an inclined manner, so that the image side surface of the stray light improving part 12 plays a role in bearing and protecting the lens 20, and the bearing stability of the lens 20 in the assembling process is ensured. In addition, the object side surface of the stray light improving part 12 is obliquely extended from the inner ring surface 111 to the direction close to the image side surface of the stray light improving part 12, so that the inner ring surface of the stray light improving part 12 can receive light emitted into the inner ring surface at different angles, further more stray light can be absorbed by the inner ring surface of the stray light improving part 12, the purpose of improving the stray light is achieved, meanwhile, the stray light improving part 12 can be ensured not to shield imaging light, and the imaging stability is ensured.

The assembly receiving portion 11 is made of a black material having a light absorbing function, and may be made of a material such as polycarbonate or L-1225Y, and the stray light improving portion 12 is made of a resin material having a light transmitting function. The assembly receiving part 11 is set to be black, so that the assembly receiving part 11 can absorb light conveniently, reflection of the light on the assembly receiving part 11 is reduced, and generation of stray light is further reduced.

Specifically, the object-side surface of the stray light improving part 12 and the image-side surface of the stray light improving part 12 are transitionally connected in the direction close to the optical axis 60. The object side of the stray light improving part 12 is transitionally connected with the image side of the stray light improving part 12 in the direction close to the optical axis 60, so that the inner annular surface of the stray light improving part 12 can receive light emitted into the inner annular surface at different angles, and further more stray light can be absorbed by the inner annular surface of the stray light improving part 12, the purpose of improving the stray light is achieved, good imaging quality is guaranteed, meanwhile, the stray light improving part 12 can not shield imaging light, and the imaging stability is guaranteed.

As shown in fig. 3 and 4, the image-side surface of the veiling glare improving part 12 includes a straight-side surface 121 and a transition surface 122, the straight-side surface 121 is connected to the image-side surface of the assembly receiving part 11 and is perpendicular to the inner annular surface 111; the straight edge surface 121 is connected to the object-side surface of the stray light improving part 12 via a transition surface 122, and the transition surface 122 extends from the straight edge surface 121 to a direction close to the object-side surface of the stray light improving part 12. The straight side surface 121 is connected with the image side surface of the assembly receiving part 11 and is perpendicular to the inner ring surface 111, so that the straight side surface 121 and the image side surface of the assembly receiving part 11 simultaneously bear and lean on the lens 20, the working stability of the lens 20 is ensured, the assembling strength of the lens 20 in the lens barrel 50 is increased, the lens 20 is prevented from shaking, and the working stability of the optical imaging lens is ensured. The straight edge surface 121 is connected to the object side surface of the stray light improving part 12 through the transition surface 122, so that the stray light improving part 12 can be prevented from being worn by the lens 20 when being deformed by the pressure of the lens 20, the damage of the stray light improving part 12 to the lens 20 is reduced, and the working stability of the lens 20 is increased. This arrangement also increases the structural strength of the flare reducing portion 12. The transition surface 122 extends obliquely from the straight edge surface 121 to a direction close to the object side surface of the stray light improving portion 12, so that the transition surface 122 can absorb light incident on the inner ring surface 111 at different angles, and further the inner ring surface of the stray light improving portion 12 can absorb more stray light, thereby greatly ensuring the stray light improving effect of the stray light improving portion 12.

As shown in fig. 5, the object-side surface and the transition surface 122 of the stray light improving part 12 are provided with a light absorbing film layer 123. The object side surface and the transition surface 122 of the stray light improving part 12 are provided with the light absorbing film layer 123, so that the light absorbing film layer 123 can absorb most of stray light to improve the stray light.

In the embodiment shown in fig. 5, the black area is the light absorbing layer 123.

The light absorbing layer 123 may be disposed on the object side surface of the stray light improving unit 12 and the transition surface 122 by vapor deposition, and the light absorbing layer 123 may be disposed on the object side surface of the stray light improving unit 12 and the transition surface 122 by coating.

Specifically, the roughness of the object-side surface and the transition surface 122 of the stray light improving part 12 is 1.0 μm or more. If the roughness of the object-side surface and the transition surface 122 of the stray light improving part 12 is less than 1.0 μm, the light absorbing film layer 123 is easily separated from the stray light improving part 12, and the connection stability between the light absorbing film layer 123 and the stray light improving part 12 is affected. The roughness of the object side surface and the transition surface 122 of the stray light improving part 12 is set to be more than 1.0 micron, so that the connection tightness of the stray light improving part 12 and the light absorbing film layer 123 is ensured.

Specifically, the surface roughness of the light absorbing film layer 123 is 1.0 μm or less. If the surface roughness of the light-absorbing layer 123 is greater than 1.0 μm, the aperture accuracy of the inner annular surface of the stray light improving portion 12 is easily affected, and the absorption of stray light by the light-absorbing layer 123 is also affected. The surface roughness of the light absorption film layer 123 is limited within 1.0 micron, the caliber precision of the inner ring surface of the stray light improving part 12 is ensured, and the stray light improving effect of the light absorption film layer 123 is ensured.

In addition, the thickness of the light absorption film layer 123 is 200 nm or more and 1000 nm or less. If the thickness of the light absorption film layer 123 is less than 200 nm, the thickness of the light absorption film layer 123 is too small, so that the light absorption film layer 123 is not easy to manufacture, and the processing difficulty of the light absorption film layer 123 is increased. If the thickness of the light absorption film layer 123 is greater than 1000 nm, the thickness of the light absorption film layer 123 is too large, which easily shields the imaging light, causes incomplete imaging, affects the imaging quality, and is not beneficial to the light and thin of the light absorption film layer 123. The thickness of the light absorption film layer 123 is limited within the range of 200 nm to 1000 nm, so that the light and thin of the light absorption film layer 123 can be guaranteed, imaging light rays cannot be shielded, and imaging quality is guaranteed.

As shown in fig. 4, the distance a between the outer annular surface of the assembly receiving portion 11 and the inner annular surface 111 is 0.2 mm or more and 3 mm or less. If the distance a between the outer annular surface of the assembly receiving portion 11 and the inner annular surface 111 is less than 0.2 mm, the distance between the outer annular surface of the assembly receiving portion 11 and the inner annular surface 111 becomes small, which causes insufficient strength of the assembly receiving portion 11, easily causes deformation of the assembly receiving portion 11, and fails to fix the lens 20 satisfactorily. If the distance a between the outer annular surface and the inner annular surface 111 of the assembly receiving portion 11 is greater than 3 mm, the distance between the outer annular surface and the inner annular surface 111 of the assembly receiving portion 11 is too large, so that the assembly receiving portion 11 is relatively thick and heavy, which is not favorable for the light and thin of the optical imaging lens, and meanwhile, the too large assembly receiving portion 11 is easy to block the lens, which affects the imaging of the lens. The distance a between the outer annular surface and the inner annular surface 111 of the assembly receiving portion 11 is limited to a range of 0.2 mm to 3 mm, and the strength of the assembly receiving portion 11 can be ensured while the weight of the assembly receiving portion 11 can be reduced as much as possible.

Specifically, the distance B between the object-side surface of the assembly receiving portion 11 and the image-side surface of the assembly receiving portion 11 is not less than 0.2 mm and not more than 3 mm. If the distance B between the object-side surface of the assembly receiving portion 11 and the image-side surface of the assembly receiving portion 11 is less than 0.2 mm, the thickness of the assembly receiving portion 11 is reduced, and the assembly receiving portion 11 is easily deformed during operation. If the distance B between the object side surface of the assembly receiving portion 11 and the image side surface of the assembly receiving portion 11 is greater than 3 mm, the assembly receiving portion 11 is too thick, and the light shielding element 10 is too thick, which is not favorable for the light shielding element 10 to be assembled into the optical imaging lens. The distance B between the object side surface of the assembly receiving part 11 and the image side surface of the assembly receiving part 11 is limited within the range of 0.2 mm to 3 mm, so that the structural strength of the assembly receiving part 11 can be ensured, the assembly receiving part 11 is not too thick, and the light shielding element 10 can be smoothly assembled in the optical imaging lens.

As shown in fig. 1, the optical imaging lens includes a lens barrel 50, a plurality of lenses 20 and at least one light shielding element 10, wherein the plurality of lenses 20 are arranged at intervals along an optical axis 60 direction of the lens barrel 50; the light blocking member 10 is disposed between adjacent two lenses 20. By arranging the light shielding element 10 in the optical imaging lens, stray light can be improved, and the imaging quality of the optical imaging lens can be ensured. The optical imaging lens with the shading element has less stray light and clearer imaging.

As shown in fig. 1, the optical imaging lens further includes a spacer 40, and the spacer 40 is disposed between the light shielding element 10 and the lens 20 to support the light shielding element 10, so as to avoid the risk that the light shielding element 10 crushes the lens 20, and increase the stability of the operation of the optical imaging lens. The optical imaging lens further comprises a spacer 30, and the spacer 30 is arranged between the adjacent lenses 20 to bear and support the adjacent lenses 20, so that the assembling stability of the lenses 20 in the lens barrel 50 is ensured. Meanwhile, due to the arrangement of the spacer 40, stray light can be further absorbed, the reflection of light rays on an optical mechanism area of the lens 20 is reduced, the generation of stray light is reduced, and the imaging quality of the optical imaging lens is improved.

When the shading element 10 in the present application is manufactured, a two-color injection mold is used for injection molding, so that two materials of different materials are integrally molded. The assembling bearing part 11 is formed by injection molding of a black material with a light absorption function, the stray light improving part 12 is formed by injection molding of a resin material with a light transmission function, and the two different materials can be injected into an integral structure by a double-color injection mold, so that the structural strength of the shading element 10 is ensured, and the shading element 10 can stably work.

As shown in fig. 6, the two-color injection mold further includes two PL structures, the PL1 structure is located in a region where the image side surface of the light shielding element 10 is connected to the outer annular surface of the light shielding element 10, and the split direction is parallel to the direction of the optical axis 60, and the PL2 structure is located in a region where the object side surface of the light shielding element 10 is connected to the inner annular surface of the light shielding element 10, and the split direction is perpendicular to the direction of the optical axis 60, so as to facilitate the demolding of the stray light improving part 12, the stray light improving part 12 is preferentially molded, and then the assembly receiving part 11 is molded. Of course, the assembly receiving portion 11 may be molded first, and the flare-improving portion 12 may be molded again.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred 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 (10)

1. Shading element, characterized in that it is ring-shaped and comprises, towards the direction close to the optical axis (60):

an assembly receiving part (11);

a stray light improving part (12), wherein the stray light improving part (12) is arranged on an inner ring surface (111) of the assembly receiving part (11), the stray light improving part (12) and the assembly receiving part (11) are integrally formed, and the object side surface of the stray light improving part (12) obliquely extends from the inner ring surface (111) to the direction close to the image side surface of the stray light improving part (12);

a light-absorbing film layer (123), the light-absorbing film layer (123) being disposed on the stray light improving section (12).

2. Shading element according to claim 1, characterized in that the object-side surface of the veiling glare modifier (12) and the image-side surface of the veiling glare modifier (12) are transitionally joined in a direction close to the optical axis (60).

3. A shading element according to claim 1, wherein the image side surface of the veiling glare improving section (12) comprises:

a straight side surface (121), the straight side surface (121) being connected to the image side surface of the assembly receiving part (11) and being perpendicular to the inner ring surface (111);

the straight edge surface (121) is connected with the object side surface of the stray light improving part (12) through the transition surface (122), and the transition surface (122) extends from the straight edge surface (121) to the direction close to the object side surface of the stray light improving part (12) in an inclined mode.

4. A shading element according to claim 3, wherein the object side surface of the veiling glare improving part (12) and the transition surface (122) are provided with the light absorbing film layer (123).

5. Shading element according to claim 4, characterized in that the object side face of the veiling glare modifier (12) and the transition face (122) have a roughness of 1.0 micrometer or more.

6. A shading element according to claim 4, characterized in that the surface roughness of the light absorbing film layer (123) is 1.0 micrometer or less.

7. A shading element according to claim 4, wherein the thickness of the light absorbing film layer (123) is 200 nm or more and 1000 nm or less.

8. Shading element according to any one of claims 1 to 7, characterized in that the distance A between the outer annular surface of the assembly reception (11) and the inner annular surface (111) is greater than or equal to 0.2 mm and less than or equal to 3 mm.

9. Shading element according to any one of claims 1 to 7, characterized in that the distance B between the object side of the assembly receptacle (11) and the image side of the assembly receptacle (11) is greater than or equal to 0.2 mm and less than or equal to 3 mm.

10. An optical imaging lens, comprising:

a lens barrel (50);

a plurality of lenses (20), wherein the plurality of lenses (20) are arranged at intervals along the direction of the optical axis (60) of the lens barrel (50);

at least one shading element (10) according to any one of claims 1 to 9, the shading element (10) being arranged between two adjacent lenses (20).

Images