CN210803840U

CN210803840U - Lens assembly and optical lens with same

Info

Publication number: CN210803840U
Application number: CN201920805152.7U
Authority: CN
Inventors: 徐海峰; 左长勇; 沈伊君
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-06-19
Anticipated expiration: 2029-05-30

Abstract

The utility model provides a lens subassembly and have optical lens of lens subassembly. The optical lens includes: the lens assembly comprises at least one lens and a mounting structure arranged on the circumferential outer side of the at least one lens; the lens barrel is provided with a mounting cavity, and the mounting structure is matched with the lens barrel so that the lens assembly is accommodated in the mounting cavity. The technical scheme of the utility model solved under different temperatures, especially under adverse circumstances such as high and low temperature, how to guarantee that the fit-up gap between lens and the lens cone keeps being close unanimous problem.

Description

Lens assembly and optical lens with same

Technical Field

The utility model relates to an optical lens technical field particularly, relates to a lens subassembly and have optical lens of lens subassembly.

Background

With the progress of science and technology, the requirements on optical systems in various fields are more and more strict, and with the continuous improvement of the requirements on technical indexes such as resolution, field of view, aperture, distortion and the like, the corresponding optical lens structure is more and more complex, and the difficulty of optical adjustment is more and more increased. For example, under the relatively harsh conditions of high and low temperature environments, the fit clearance between the optical lens and the lens barrel may change, and if the fit clearance increases, the optical axis consistency error may increase; if the lens barrel holds the lens tightly, interference fit is caused, the lens is deformed due to stress, aberration is increased, and in short, any slight change affects the imaging quality of the optical system.

Therefore, how to ensure that the assembly gap between the lens and the lens barrel is kept close to be consistent under different temperatures, especially under severe environments such as high and low temperatures, is a technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a lens assembly and an optical lens having the same, which solves the problem of how to ensure the assembling clearance between the lens and the lens barrel to be kept close to the same at different temperatures.

The utility model discloses an advantage lies in: the lens external diameter increases mounting structure, and mounting structure sets up at the lens periphery, and mounting structure and lens adopt integral type compression molding, and mounting structure and lens realize not having not hard up cooperation through unsmooth cooperation simultaneously.

The utility model discloses a another advantage lies in: the lens and the mounting structure are integrally matched at high temperature, and after the lens and the mounting structure are cooled to normal temperature and molded, the expansion coefficient difference between the mounting structure and the lens (the expansion coefficient of the lens material is 10 multiplied by 10)^-6The expansion coefficient of mounting structure material such as brass, stainless steel, etc. is 15 × 10 ℃^-6Above/° c), the lens shrinkage is less than the collar shrinkage, which results in a tighter fit between the collar and the lens.

The utility model discloses a another advantage lies in: the variable quantity of the lens assembly at high and low temperatures is completely guided by the lantern ring, the expansion coefficient of the mounting structure is larger than that of the lens, the mounting structure which is the same as or similar to that of the lens barrel is used for assembling and matching, the material can be metal or plastic, so that the matching clearance can be kept close to the same value at different temperatures, and looseness or extrusion is not generated.

The utility model discloses a another advantage lies in: under the same process condition, when a single lens is molded by compression, the mounting structure exists or not, the difference of the surface type is very small, the difference is visually the same, namely the deformation generated when the mounting structure is contracted is not enough to influence the surface type of the lens.

In order to achieve the above object, according to an aspect of the present invention, there is provided an optical lens including: the lens assembly comprises at least one lens and a mounting structure arranged on the circumferential outer side of the at least one lens; the lens barrel is provided with a mounting cavity, and the mounting structure is matched with the lens barrel so that the lens assembly is accommodated in the mounting cavity.

Further, the lens barrel and the mounting structure have the same expansion coefficient.

Further, the mounting structure and the lens barrel are made of the same material.

Further, the lens barrel is made of a first material, the mounting structure is made of a second material, and an absolute value of a difference between an expansion coefficient of the first material and an expansion coefficient of the second material is 5 × 10 or less^-6/℃。

Further, at least one lens and the installation structure are integrally formed or the installation structure is sleeved on the periphery of the at least one lens.

Further, the mounting structure has a coefficient of expansion that is greater than the coefficient of expansion of the lens.

Further, the expansion coefficient of the lens is 10 x 10 or less^-6V. DEG C, or the expansion coefficient of the mounting structure is 15 x 10 or more^-6/° c, or the coefficient of expansion of the lens is 10 × 10 or less^-6A coefficient of expansion of the mounting structure of 15 x 10 or more at/DEG C^-6/℃。

Furthermore, at least one mounting structure groove is arranged on the inner wall surface of the mounting structure, and the lens is matched with the mounting structure groove.

Further, the optical lens further comprises a first anti-slip layer arranged in the groove of the mounting structure.

Further, the longitudinal section of the mounting structure groove is one or more of a triangle, an arc, a trapezoid and a rectangle.

Further, the outer surface of the lens matched with the groove of the mounting structure is provided with a second anti-slip layer.

Furthermore, the peripheral surface of lens is equipped with at least one lens recess, and mounting structure and lens recess cooperation set up.

Further, the optical lens also comprises a first anti-slip layer arranged in the lens groove.

Further, the longitudinal section of the lens groove is one or more of a triangle, an arc, a trapezoid and a rectangle.

Further, the outer surface of the mounting structure matched with the lens groove is provided with a second anti-slip layer.

Further, the mounting structure is a collar disposed circumferentially outward of the at least one lens.

According to the utility model discloses an on the other hand provides a lens subassembly, and the lens subassembly includes: at least one lens; and the mounting structure is arranged on the circumferential outer side of at least one lens.

Further, the expansion coefficient of the lens is 10 x 10 or less^-6V. DEG C, or the expansion coefficient of the collar is more than or equal to 15 x 10^-6/° c, or the coefficient of expansion of the lens is 10 × 10 or less^-6A coefficient of expansion of 15 x 10 or more at/DEG C^-6/℃。

Further, the lens and the mounting structure are integrally formed or the mounting structure is sleeved on the periphery of the lens.

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 cross-sectional view of an embodiment of an optical lens according to the present invention;

fig. 2a is a schematic cross-sectional view of a first embodiment of a lens and a collar of a lens assembly of an optical lens according to the present invention;

FIG. 2b shows a partial enlarged view of FIG. 2 a;

FIG. 2c shows another enlarged partial view of FIG. 2a (in which only the lens is shown);

fig. 3a is a schematic cross-sectional view of a second embodiment of a lens and a collar of a lens assembly of an optical lens according to the present invention;

FIG. 3b shows a partial enlarged view of FIG. 3 a;

FIG. 3c shows another enlarged partial view of FIG. 3a (in which only the lens is shown);

fig. 4a is a schematic cross-sectional view of a third embodiment of the lens and collar mating of the lens assembly of the optical lens according to the present invention;

FIG. 4b shows a partial enlarged view of FIG. 4 a;

FIG. 4c shows another enlarged partial view of FIG. 4a (in which only the lens is shown);

fig. 5a is a schematic cross-sectional view of a fourth embodiment of the lens and collar cooperation of the lens assembly of the optical lens according to the present invention;

FIG. 5b shows a partial enlarged view of FIG. 5 a;

fig. 6a is a schematic cross-sectional view of a fifth embodiment of a lens and collar mating of a lens assembly of an optical lens according to the present invention;

FIG. 6b shows a partial enlarged view of FIG. 6 a;

FIG. 6c shows another enlarged partial view of FIG. 6a (in which only the collar is shown);

fig. 7a is a schematic cross-sectional view of a sixth embodiment of a lens and collar mating of a lens assembly of an optical lens according to the present invention;

FIG. 7b shows a partial enlarged view of FIG. 7 a; and

fig. 7c shows another enlarged detail of fig. 7a (in which only the collar is shown).

Wherein the figures include the following reference numerals:

10. a lens; 11. a first bump structure; 14. mounting a structure groove; 12. a lens groove; 13. a second bump structure; 15. a recessed structure; 20. a collar; 30. a lens barrel.

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.

The present invention relates to an embodiment of the present invention, the interval setting includes that the gap between two components is greater than or equal to zero, for example, as shown in fig. 5b, two adjacent first protruding structures 11 may be directly connected, and also as shown in fig. 4b, a certain distance is provided between two first protruding structures 11.

The inventor of the application finds that the assembly gap between the lens and the lens barrel changes due to different thermal expansion coefficients along with the change of the environmental temperature in the long-term working process, and therefore, based on the technical idea, in order to solve the problem of how to ensure that the assembly gap between the lens and the lens barrel can be kept close to be consistent under different temperatures, the following technical scheme is provided:

as shown in fig. 1 to 7c, the present invention provides an optical lens. The optical lens of this embodiment includes a lens assembly and a lens barrel 30. The lens assembly comprises at least one lens 10 and a mounting structure arranged on the circumferential outer side of the at least one lens 10; the lens barrel 30 has a mounting cavity, and the mounting structure is engaged with the lens barrel 30 to accommodate the lens assembly in the mounting cavity.

In the technical solution of the present application, it should be noted that the fitting of the mounting structure and the lens barrel 30 means that at different temperatures, it can be ensured that the assembly gap between the lens assembly and the lens barrel 30 maintains a close and consistent fitting manner. The means for realizing the above-mentioned matching manner is not limited to the embodiments of the present application, and any manner that can ensure that the assembly gap between the lens assembly and the lens barrel 30 is kept close to be consistent is within the protection scope of the present application.

The lens 10 is mounted inside the lens barrel 30 through the mounting structure, so that the lens 10 can be conveniently mounted, the lens 10 is ensured not to be scratched, and the imaging quality is ensured. Further, after the installation structure is arranged, the installation structure is used for conveniently controlling the assembly gap between the lens 10 and the lens barrel 30, so that the problem of how to ensure that the assembly gap between the lens 10 and the lens barrel 30 is kept close to be consistent under different temperatures, particularly severe environments such as high and low temperatures and the like is solved.

Specifically, the mounting structure may be mounted in the lens barrel 30 by a stopper member such as a pressing ring, thereby preventing the mounting structure from coming out of the lens barrel 30.

Preferably, the shape of the outer peripheral surface of the mounting structure is adapted to the shape of the inner wall surface of the lens barrel 30. Thus, the mounting structure is easily fitted into the inside of the lens barrel 30.

Preferably, the lens barrel 30 has the same or similar coefficient of expansion as the mounting structure. In the above arrangement, since the expansion coefficients of the lens barrel 30 and the mounting structure are the same or similar, when the temperature changes, the expansion amount of the lens barrel 30 is the same or similar to the expansion amount of the mounting structure, and the contraction amount of the lens barrel 30 is the same or similar to the contraction amount of the mounting structure, so that the fit clearance between the lens barrel 30 and the mounting structure can be effectively ensured, the thermal stability of the lens is improved, and the imaging quality is further improved. Further, by mounting the lens 10 inside the lens barrel 30 by the mounting structure, it is possible to ensure that the lens 10 is not scratched, thereby ensuring the imaging quality.

Specifically, the technical solution of the present application includes both the case where the coefficient of expansion of the lens barrel 30 is the same as that of the mounting structure and the case where the coefficient of expansion of the lens barrel 30 is close to that of the mounting structure. The fact that the expansion coefficients of the lens barrel 30 and the mounting structure are similar means that the expansion coefficient of the material of the lens barrel 30 and the expansion coefficient of the material of the collar 20 are similar, for example, the absolute value of the difference between the expansion coefficient of the lens barrel 30 and the expansion coefficient of the mounting structure is less than or equal to 5 × 10^-6/℃。

Therefore, when the environmental temperature changes, the matching between the lantern ring 20 and the lens barrel 30 cannot be loosened or extruded, so that the matching gaps are kept close and consistent, and the imaging quality is improved.

In an actual production process, the lens barrel 30 and the mounting structure can be manufactured by using the same material (metal or plastic) so that the expansion coefficients of both are the same.

The utility model discloses an in the embodiment of the utility model, lens 10 and mounting structure adopt the integration shaping. Preferably, the lens 10 and the collar 20 as the mounting structure are provided as a unitary structure using a high temperature compression molding process. Like this, lens 10 and lantern ring 20 accomplish the integration cooperation under high temperature, and after cooling to the normal atmospheric temperature shaping, because the expansion coefficient of lantern ring 20 is greater than the expansion coefficient of lens 10, consequently, the shrinkage of lantern ring 20 is greater than the shrinkage of lens 10, and lantern ring 20 can hug closely lens 10 for the cooperation between lantern ring 20 and the lens 10 is inseparable, and lens 10 is difficult for separating with lantern ring 20.

Of course, in other embodiments, the collar 20 can be sleeved on the periphery of the lens 10, and such an assembly manner is simple and easy to operate.

The utility model discloses an in the alternative embodiment that the drawing of the embodiment of the utility model does not show, can also set up mounting structure like this, mounting structure includes a plurality of discontinuous (independent combination promptly) segmental arcs, and a plurality of segmental arcs all are located the circumference outside of lens 10, and wherein, a plurality of segmental arcs independent combination enclose into the similar chamber that holds that can hold lens 10, can establish above-mentioned a plurality of segmental arcs and lens 10 into a body structure through integrated into one piece mode.

In the embodiments of the present invention, it should be noted that the expansion coefficient of the lens 10 is less than or equal to 10 × 10^-6The coefficient of expansion of the collar 20 is equal to or greater than 15 x 10 at/DEG C^-6V. C. Alternatively, the collar 20 may be made of brass or stainless steel or a plastic material.

Like this, the coefficient of expansion of the lantern ring 20 is greater than the coefficient of expansion of lens 10, accomplishes the integration cooperation with lantern ring 20 under high temperature when lens 10, and after cooling to normal atmospheric temperature shaping, the shrinkage of the lantern ring 20 is greater than the shrinkage of lens 10, and the lantern ring 20 can hold lens 10 tightly for the cooperation between lantern ring 20 and the lens 10 is inseparabler. The integral structure formed by the collar 20 and the lens 10 can be used as a module, and the module is integrally assembled into the lens barrel 30, so that the assembly efficiency is improved.

In other embodiments, the expansion coefficient of the lens 10 may be limited to 10 × 10 or less only^-6/deg.C, or an expansion coefficient of 15 x 10 or more for the collar 20^-6/° c, it is within the scope of the present disclosure to ensure that the coefficient of expansion of the collar 20 is greater than the coefficient of expansion of the lens 10.

Of course, in other embodiments of the present invention, other embodiments can be adopted to mate the collar 20 and the lens 10, for example, at least one mounting structure groove 14 is provided on the inner wall surface of the collar 20, the lens 10 is disposed in cooperation with the mounting structure groove 14, or at least one lens groove 12 is provided on the outer peripheral surface of the lens 10, and the collar 20 is disposed in cooperation with the lens groove 12. The specific formation of the mounting structure groove 14 and the lens groove 12 is various and is not limited to the embodiments of the present application.

In an alternative embodiment, as shown in fig. 2a to 2c, it is also possible to provide that the first raised formation 11 is provided on the outer wall surface of the lens 10 and the mounting formation recess 14 is provided on the inner wall surface of the collar 20. Therefore, the lens 10 can be clamped into the lantern ring 20 through the mutual matching of the first protruding structures 11 and the mounting structure grooves 14, a non-loose fit is realized, and the lens 10 is ensured not to be easily separated from the lantern ring 20.

In an alternative embodiment not shown in the drawings, based on the structure shown in fig. 2a to 2c, in order to further ensure that the lens 10 is clamped into the collar 20 to ensure that the lens 10 is not released from the collar 20, it may be provided that a second convex structure 13 is arranged on the inner wall surface of the collar 20 at a distance from the mounting structure groove 14, a concave structure 15 is arranged on the outer wall surface of the lens 10 at a distance from the first convex structure 11, and the second convex structure 13 is arranged in cooperation with the concave structure 15.

Of course, in another embodiment, as shown in fig. 3a to 3c, the first protrusion 11 may be disposed on the inner wall surface of the collar 20, and the lens groove 12 may be disposed on the outer wall surface of the lens 10.

In another embodiment, as shown in fig. 4a to 4c, the inner wall surface of the collar 20 is further provided with a concave structure 15 spaced from the first convex structure 11, the outer wall surface of the lens 10 is provided with a second convex structure 13 spaced from the lens groove 12, and the second convex structure 13 is disposed in cooperation with the concave structure 15. In this way, the lens 10 can be better confined within the collar 20, ensuring that the lens 10 is not easily dislodged from the collar 20.

Alternatively, as shown in fig. 5b and 4b, the first projection structure 11 is plural. The plurality of first convex structures 11 are arranged at intervals along the optical axis direction of the lens 10. The outer wall surface of the lens 10 is provided with a plurality of lens grooves 12 which are arranged in one-to-one correspondence with the first protruding structures 11, so that a plurality of concave-convex matched structures can be formed between the lens 10 and the lantern ring 20, and the lens 10 is not easy to be separated from the lantern ring 20.

Of course, in an alternative embodiment not shown in the drawings, it is also possible to arrange one lens groove 12 for a plurality (e.g. two or three, etc.) of first raised structures 11. The present invention is not limited to the above setting manner, and any structure that can realize the cooperation between the lens 10 and the collar 20 is within the protection scope of the present invention.

As shown in fig. 6a to 6c, in another embodiment of the present invention, the inner wall surface of the collar 20 is provided with a mounting structure groove 14, and the outer surface of the lens 10 is provided with an anti-slip layer. Wherein the slip-resistant layer is formed of an uneven body integrally molded with the lens 10. The purpose is to enhance the friction between the first raised structure 11 of the lens 10 and the mating mounting structure groove 14 to prevent the lens 10 from falling out of the collar 20.

Of course, it is also possible to provide the anti-slip layer only on the inner wall surface of the mounting structure groove 14. Or both the outer surface of the lens 10 and the inner wall surface of the mounting structure groove 14.

In addition to the above embodiments, the present invention also provides a lens assembly. The lens assembly includes at least one lens 10 and a mounting structure disposed circumferentially outward of the at least one lens 10.

When the lens assembly of the above-mentioned setting is applied to optical lens, utilize the lens cone cooperation of mounting structure and optical lens to install whole lens assembly in the lens cone, install at least one lens 10 to lens cone 30 inside through mounting structure, can be easy to assemble lens 10, ensure that lens 10 can not by the fish tail to ensure imaging quality. Further, after the installation structure is arranged, the installation structure is used for conveniently controlling the assembly gap between the lens 10 and the lens barrel 30, so that the problem of how to ensure that the assembly gap between the lens 10 and the lens barrel 30 is kept close to be consistent under different temperatures, particularly severe environments such as high and low temperatures and the like is solved.

Of course, the lens assembly of the present application can be applied to other fields, and is not limited to an optical lens.

In a preferred embodiment, the mounting structure has a coefficient of expansion that is greater than the coefficient of expansion of the lens 10.

Like this, accomplish integration assembly under high temperature when lens 10 and mounting structure to after cooling to normal atmospheric temperature shaping, lens 10 shrinkage is less than mounting structure's shrinkage, and mounting structure can hold lens 10 tightly and make mounting structure and lens 10 cooperation inseparabler.

Alternatively, there may be one or more lenses. That is, the attachment structure may be provided on the circumferential outer side of one lens 10, or may be provided on the circumferential outer sides of a plurality of lenses 10.

Preferably, the mounting structure is a collar 20 disposed circumferentially outward of the lens 10.

The expansion coefficient of the lens 10 is 10 × 10 or less^-6/° c (i.e., coefficient of expansion at 10 x 10)^-6Below/° c). The expansion coefficient of the collar 20 is 15 x 10 or more^-6V. C. The two materials described above cooperate to ensure a tighter fit between the lens 10 and the collar 20. The material of the collar 20 may be brass, stainless steel, plastic, etc. The lens 10 and the collar 20 are made into an integral structure by a high temperature compression molding process.

According to another aspect of the present invention, there is provided a method for manufacturing an optical lens, the method for manufacturing the optical lens includes the following steps:

step S10: assembling the mounting structure about the periphery of the at least one lens 10 to form a lens assembly;

step S20: the lens assembly is assembled inside the lens barrel 30.

Preferably, the mounting structure is a collar, and before the step S20, the manufacturing method further includes the step S15: mounting structure grooves 14 are provided on the inner wall surface of the collar 20 to mate the lenses 10 with the mounting structure grooves 14.

Alternatively, in another alternative embodiment, before step S20, the manufacturing method further includes step S16: a lens groove 12 is provided on the outer peripheral surface of the lens 10 so that the collar 20 fits into the lens groove 12.

It is to be noted that step S15 or step S16 may be performed before step S10. So long as the fit between the collar 20 and the lens 10 is ensured.

Prior to step S20, the manufacturing method further includes the step of providing the collar 20 and the at least one lens 10 as one piece by a high temperature compression molding integration process.

When lens 10 and mounting structure accomplish integration assembly under high temperature to cool off to the normal atmospheric temperature shaping after, lens 10 shrinkage is less than the shrinkage of lantern ring 20, lantern ring 20 can hold lens 10 tightly and make lantern ring 20 and lens 10 cooperate inseparabler.

Before step S20, the manufacturing method further includes a step of manufacturing the collar 20 using a material having the same or similar expansion coefficient as that of the lens barrel 30.

In addition, it should be noted that, in addition to the above-mentioned high-temperature press-integrated molding process, the manufacturing method further includes a step of fitting the collar 20 onto the circumferential outer side of the lens 10 before step S20. This method of fitting the collar 20 around the lens 10 is convenient to operate. The technical solution of the present application includes a case where the expansion coefficients of the lens barrel 30 and the collar 20 are the same, and also includes a case where the expansion coefficients of the lens barrel 30 and the mounting structure are close to each other. The fact that the expansion coefficients of the lens barrel 30 and the collar 20 are the same means that the two can be made of the same material or different materials. The close expansion coefficient between the lens barrel 30 and the collar 20 means the expansion coefficient of the material of which the lens barrel 30 is madeThe number of the expansion coefficients is close to that of the material of the collar 20, for example, the absolute value of the difference between the expansion coefficient of the lens barrel 30 and the expansion coefficient of the collar 20 is 5 × 10 or less^-6/℃。

In the following, different embodiments of the present invention are described with reference to the following specific drawings:

the first embodiment is as follows:

fig. 2a to 2c are schematic cross-sectional views of a first embodiment of a lens assembly of the present invention, wherein the lens assembly includes a lens 10 and a collar 20 disposed at the circumferential outer side of the lens 10; the lens barrel 30 has a mounting cavity, and the collar 20 is matched with the lens barrel 30 so as to accommodate the lens assembly in the mounting cavity, wherein the expansion coefficients of the lens barrel 30 and the collar 20 are consistent.

In the above arrangement, since the expansion coefficients of the lens barrel 30 and the collar 20 are consistent, when the temperature changes, the expansion amount of the lens barrel 30 is consistent with the expansion amount of the collar 20, so that the fit clearance between the lens barrel 30 and the collar 20 can be effectively ensured, the thermal stability of the lens is improved, and the imaging quality is further improved. Further, by mounting the lens 10 inside the lens barrel 30 through the collar 20, it is possible to ensure that the lens 10 is not scratched, thereby ensuring the imaging quality.

The case where the expansion coefficients of the lens barrel 30 and the collar 20 are matched includes the case where the expansion coefficients of the lens barrel 30 and the collar 20 are the same, and also includes the case where the expansion coefficients of the lens barrel 30 and the collar 20 are close to each other. The expansion coefficients of the lens barrel 30 and the collar 20 being similar means that the expansion coefficient of the material of the lens barrel 30 and the expansion coefficient of the material of the collar 20 are similar, for example, the absolute value of the difference between the expansion coefficient of the lens barrel 30 and the expansion coefficient of the collar 20 is less than or equal to 5 × 10^-6/℃。

In an actual production process, the lens barrel 30 and the collar 20 may be manufactured by using the same material (metal or plastic) so that the expansion coefficients of both are the same.

In the first embodiment, the lens 10 and the collar 20 are formed as an integral structure by a high temperature compression molding process. Like this, lens 10 and lantern ring 20 accomplish the integration cooperation under high temperature, and after cooling to the normal atmospheric temperature shaping, because the expansion coefficient of lantern ring 20 is greater than the expansion coefficient of lens 10, consequently, the shrinkage of lantern ring 20 is greater than the shrinkage of lens 10, and lantern ring 20 can hug closely lens 10 for the cooperation between lantern ring 20 and the lens 10 is inseparable, and lens 10 is difficult for separating with lantern ring 20.

The expansion coefficient of the material of the lens 10 is 10 × 10^-6Below/° c. The material of the collar 20 has a coefficient of expansion of 15 x 10^-6Above/° c.

The lens 10 may be circular, rectangular, or other irregular shape. Taking a circular lens 10 as an example, the collar 20 has a mounting structure groove into which the circumferential outer edge of the lens 10 fits.

In the first embodiment, as shown in fig. 2a to 2c, the first convex structure 11 is disposed on the outer wall surface of the first lens 10, and the mounting structure groove 14 matched with the first convex structure 11 is disposed on the inner wall surface of the collar 20. Through the concave-convex matching of the first convex structures 11 and the mounting structure grooves 14, the lens 10 can be clamped inside the lantern ring 20, and the lens 10 is prevented from being pulled out from the lantern ring 20.

Specifically, the number of the first convex structures 11 is one, and the first convex structures 11 are linear protrusions protruding toward the outer circumferential side of the lens 10, that is, the cross-sectional shape of the arc-shaped protrusions is a trapezoidal structure shown in fig. 2 c. Of course, to ensure a tight fit, the mounting structure recess 14 provided on the inner wall of the collar 20 is a linear recess adapted to the outer shape of the first raised structure 11. The linear groove extends from the inner hole wall of the collar 20 in a direction close to the outer peripheral surface of the collar 20.

The method can be specifically implemented as follows: the collar 20 has a diameter of 20mm with a tolerance of-0.1 mm to-0.13 mm. The diameter of the position with the largest inner aperture of the lantern ring 20 is 16.8mm, and the tolerance is +/-0.03 mm; the diameter of the collar 20 at the location of minimum internal bore diameter is 16.4mm with a tolerance of + -0.03 mm.

For convenience of processing, the first protrusion structure 11 and the lens 10 are integrally formed. Of course, in an alternative embodiment not shown in the drawings, the first protrusion 11 may be provided separately from the lens 10, or the lens 10 may be directly clamped in the mounting groove 14 of the collar 20 without providing the first protrusion.

It should be noted that in other alternative embodiments, an anti-slip layer may be disposed in the mounting structure groove or on the outer peripheral surface of the lens 10 that is engaged with the mounting structure groove 14 according to actual needs.

Example two:

fig. 3a to 3c are schematic cross-sectional views illustrating a second embodiment of a lens assembly of the present invention, the second embodiment is different from the first embodiment in that:

(1) the matching structures of the lens 10 and the lantern ring 20 are different, the specific arrangement of the first protruding structure 11 is different from that in the first embodiment, in the second embodiment, the first protruding structure 11 is arranged on the inner side of the lantern ring 20, and the outer wall surface of the lens 10 is provided with a lens groove 12;

(2) the number of the first protruding structures 11 is different, in the second embodiment, the number of the first protruding structures 11 is two, and a certain distance is formed between the two first protruding structures 11;

(3) the specific structure of the first convex structure 11 is different from that in the first embodiment, and in the second embodiment, the cross section of the first convex structure 11 includes a diagonal line segment and a curve connected to the diagonal line segment. That is, the first projection structure 11 is a projection including an arc surface and a plane.

(4) The lens grooves 12 are provided on the outer peripheral surface of the lens 10, and the number thereof is two.

In the second embodiment, the other definitions of the lens 10 and the collar 20 are the same as those in the first embodiment, and are not repeated herein.

Example three:

fig. 4a to 4c are schematic cross-sectional views illustrating a third embodiment of a lens assembly of the present invention, the third embodiment is different from the second embodiment in that:

on the basis of the first convex structure 11, a concave structure 15 is added, and the concave structure 15 is connected with the first convex structure 11. Similarly, a second convex structure 13 is added on the basis of the lens groove 12, and the second convex structure 13 is matched with the concave structure 15;

it should be noted that the first protrusion structure 11 in the third embodiment may be the same as the first protrusion structure 11 in the second embodiment, and other types of protrusion structures may also be used.

In the third embodiment, the other definitions of the lens 10 and the collar 20 are the same as those in the second embodiment, and are not repeated herein.

Example four:

fig. 5a and 5b are schematic cross-sectional views illustrating a fourth embodiment of a lens assembly of the present invention, the fourth embodiment is different from the second embodiment in that:

(1) the number of the first protruding structures 11 is three or more in the fourth embodiment.

(2) The arrangement of the plurality of first projection structures 11, in the fourth embodiment, the plurality of first projection structures 11 are arranged in a zigzag structure on the inner wall surface of the collar 20.

(3) The specific structure of the lens groove 12, in the fourth embodiment, the lens groove 12 is a structure matching with the above-mentioned saw-toothed structure.

(4) The shape of the first protruding structure 11, in the fourth embodiment, the cross-sectional shape of the first protruding structure 11 is a triangle or an approximate triangle.

Of course, the fourth embodiment is not limited to the above-mentioned specific structure, and in the embodiment not shown in the drawings, a plurality of first protrusion structures 11 may be arranged in a manner of combining a sawtooth-shaped structure and an arc-shaped protrusion, or a manner of combining a triangular protrusion and a rectangular protrusion, or a manner of combining a rectangular protrusion and a trapezoidal protrusion, and the like. In any case, any combination of the above-mentioned protrusions of different shapes is within the scope of the present application as long as the male and female fit between the collar 20 and the lens 10 can be achieved.

Similarly, the longitudinal cross section of the lens groove 12 can be triangular or arc-shaped or trapezoid or rectangular or any combination of different shapes, such as a combination of triangular and rectangular shapes, a combination of arc-shaped and trapezoid shapes, etc. In short, the concave unit and the convex unit are matched in shape, and concave-convex matching can be achieved.

In the fourth embodiment, the other definitions of the lens 10 and the collar 20 are the same as those of the second embodiment, and are not repeated herein.

Example five:

fig. 6a to 6c are schematic cross-sectional views illustrating a fifth embodiment of a lens assembly of the present invention, the fifth embodiment is different from the first embodiment in that:

(1) the first convex structures 11 are different in shape, and in the fifth embodiment, the cross section of the first convex structure 11 is arc-shaped. That is, the first protrusion 11 is an arc-shaped protrusion protruding toward the outer side of the lens 10 in the circumferential direction. Similarly, the shape of the mounting structure groove 14 matched with the first protrusion structure 11 is also different from the first embodiment, in which the mounting structure groove 14 is an arc-shaped groove.

(2) An anti-slip layer is arranged on the arc-shaped surface of the first protruding structure 11 and/or the inner wall surface of the mounting structure groove 14, and the anti-slip layer is a plurality of convex-concave convex points, or when the arc-shaped surface is a rough surface, the rough surface forms an anti-slip layer, wherein the rough surface can be a frosted surface.

In the fifth embodiment, the other definitions of the lens 10 and the collar 20 are the same as those of the first embodiment, and are not repeated herein.

Example six:

fig. 7a to 7c are schematic structural views illustrating a sixth embodiment of a lens assembly of the present invention, the sixth embodiment is different from the first embodiment in that:

the number of the first bump structures 11 is different, and in the fifth embodiment, there are two first bump structures 11. Correspondingly, the lens assembly further comprises a mounting structure groove 14 which is matched with the two first protruding structures 11 in a one-to-one correspondence manner, and the mounting structure groove 14 is a trapezoidal groove.

In the sixth embodiment, the other definitions of the lens 10 and the collar 20 are the same as those in the first embodiment, and are not described herein again.

Example eight:

the eighth embodiment is different from the first embodiment in that: the number of the lenses 10 is different, and in the eighth embodiment, the lens assembly includes two or more lenses 10, and the collar 20 is disposed on the circumferential outer side of the two or more lenses 10. Each lens 10 is assembled with the collar 20 by the above-mentioned male and female fitting structure.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: because the expansion coefficients of the lens barrel and the lantern ring are the same or similar, when the temperature changes, the expansion amount of the lens barrel is the same or similar to that of the lantern ring, and the contraction amount of the lens barrel is the same or similar to that of the lantern ring, so that the fit clearance between the lens barrel and the lantern ring can be effectively ensured, the thermal stability of the lens is improved, and the imaging quality is further improved. The lens and the lantern ring are integrated into a whole by adopting a high-temperature compression molding process. Like this, lens and lantern ring accomplish the integration cooperation under high temperature, cool off to the normal atmospheric temperature shaping after, because the coefficient of expansion of the lantern ring is greater than the coefficient of expansion of lens, consequently, the shrinkage of the lantern ring is greater than the shrinkage of lens, and the lens can be held tightly to the lantern ring for the cooperation between lantern ring and the lens is inseparabler, and the lens is difficult for separating with the lantern ring. The outer wall surface of the lens is provided with a lens groove, the inner wall surface of the lantern ring is provided with a first bulge structure matched with the lens groove, and the lens can be clamped in the lantern ring through the concave-convex matching of the first bulge structure and the lens groove so as to prevent the lens from falling off from the interior of the lantern ring; or the inner wall surface of the lantern ring is provided with the mounting structure groove, the outer peripheral surface of the lens is provided with the first protruding structure matched with the mounting structure groove, the lens can be mounted inside the lantern ring through the matching of the first protruding structure and the mounting structure groove, and the lens is prevented from being separated from the interior of the lantern ring.

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

1. An optical lens, characterized in that the optical lens comprises:

the lens assembly comprises at least one lens and a mounting structure arranged on the circumferential outer side of the at least one lens;

the lens barrel is provided with a mounting cavity, and the mounting structure is matched with the lens barrel so that the lens assembly is accommodated in the mounting cavity;

the mounting structure has a coefficient of expansion greater than a coefficient of expansion of the lens.

2. An optical lens according to claim 1, characterized in that the coefficient of expansion of the lens barrel is the same as that of the mounting structure.

3. An optical lens according to claim 2, wherein the mounting structure and the barrel are made of the same material.

4. An optical lens barrel according to claim 1, wherein the lens barrel is made of a first material, the mounting structure is made of a second material, and an absolute value of a difference between an expansion coefficient of the first material and an expansion coefficient of the second material is 5 x 10 or less^-6/℃。

5. An optical lens according to any one of claims 1 to 4, wherein the at least one lens and the mounting structure are integrally molded or the mounting structure is fitted around the periphery of the at least one lens.

6. An optical lens according to claim 1, characterized in that the coefficient of expansion of the lens is 10 or less×10^-6/° c, or the coefficient of expansion of the mounting structure is 15 × 10 or more^-6/° c, or the coefficient of expansion of the lens is 10 × 10 or less^-6A coefficient of expansion of the mounting structure of 15 x 10 or more at/DEG C^-6/℃。

7. An optical lens according to any one of claims 1 to 4, characterized in that the inner wall surface of the mounting structure is provided with at least one mounting structure groove, and the lens is arranged in cooperation with the mounting structure groove.

8. An optical lens as recited in claim 7, further comprising a first anti-slip layer disposed in the mounting structure groove.

9. An optical lens according to claim 7, wherein the mounting structure groove has a longitudinal cross-section of one or more of triangular, arcuate, trapezoidal and rectangular.

10. An optical lens according to claim 7, characterized in that the outer surface of the lens arranged in cooperation with the mounting structure groove is provided with a second non-slip layer.

11. An optical lens barrel according to any one of claims 1 to 4, wherein the outer peripheral surface of the lens is provided with at least one lens groove, and the mounting structure is disposed in cooperation with the lens groove.

12. An optical lens according to claim 11, characterized in that the optical lens further comprises a first non-slip layer arranged in the lens groove.

13. An optical lens according to claim 11, characterized in that the longitudinal cross-section of the lens groove is one or more of triangular, arc-shaped, trapezoidal and rectangular.

14. An optical lens according to claim 11, characterized in that the outer surface of the mounting structure that is arranged to cooperate with the lens groove is provided with a second non-slip layer.

15. An optical lens according to any of claims 1 to 4, characterized in that the mounting structure is a collar provided circumferentially outside the at least one lens.

16. A lens assembly, the lens assembly comprising:

at least one lens;

a mounting structure disposed circumferentially outward of the at least one lens;

17. The lens assembly of claim 16, wherein the lens has a coefficient of expansion of 10 x 10 or less^-6/° c, or the coefficient of expansion of the mounting structure is 15 × 10 or more^-6/° c, or the coefficient of expansion of the lens is 10 × 10 or less^-6A coefficient of expansion of the mounting structure of 15 x 10 or more at/DEG C^-6/℃。

18. The lens assembly of claim 16 or 17, wherein the lens and the mounting structure are integrally formed or the mounting structure is fitted around the periphery of the lens.

19. The lens assembly of claim 16 or 17, wherein the mounting structure is a collar disposed circumferentially outward of the at least one lens.