Lens barrel and lens with temperature drift compensation structure

Abstract

The utility model provides a lens barrel and lens with a temperature drift compensation structure, including a lens barrel body and a lens bearing part for bearing a lens, the lens barrel body including an outer side wall and an inner side wall, the inner side wall surrounds the optical axis to form a lens accommodating space; the lens bearing part includes a plurality of lens bearing parts that are spaced apart and arranged on the inner side wall of the lens barrel body, and the lens bearing part extends toward the optical axis. The lens barrel and lens structure provided by the utility model can avoid deformation of the optical effective part of the lens, by arranging the lens bearing part on the lens barrel, when there is a difference in expansion between the lens barrel and the lens at low or high temperatures, the lens is squeezed in the axial direction and the squeezing force is transmitted to the lens bearing part of the lens barrel, the lens bearing part will produce a micro-deformation to prevent the internal lens from being squeezed and causing the image plane to shift. The squeezing force is unloaded by the deformation of the lens bearing part, so that the optical effective part of the lens is avoided from being deformed, and the imaging quality of the lens is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging lenses, in particular to a lens barrel and a lens with a temperature drift compensation structure. Background Art

[0002] Optical lenses have the function of light transmission and are widely used in various imaging fields such as automotive, security, and intelligent manufacturing. As a precision optical component, optical lenses have strict requirements on manufacturing and installation accuracy, and their imaging performance is sensitive to different temperatures. Optical lenses are usually installed in the lens barrel in a superimposed or interlocked manner. During assembly, they are circumferentially fixed by the inner wall of the lens barrel and axially fixed by locking rings, front rings, spacers, and lens barrels. However, under high or low temperature conditions, due to the different axial and radial expansion and contraction of the lenses, spacers, and lens barrels, extrusion occurs between the components, causing deformation of the optical effective diameter and thus affecting the optical performance; that is, at high temperatures, the traditional lens has a radial expansion greater than the radial expansion of the lens barrel, causing the effective diameter of the lens to be squeezed and deformed, resulting in changes in the surface shape and lens curvature radius (the optical effective area is squeezed and affects the imaging), which in turn causes changes in the position of the imaging surface and leads to a decrease in the resolution of the lens.

[0003] Therefore, it is necessary to provide an optical lens that does not affect the optical effective area under high and low temperature conditions to solve the above problems. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a lens barrel and a lens with a temperature drift compensation structure, which can avoid deformation of the optically effective part of the lens and have the advantage of excellent imaging quality.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a lens barrel with a temperature drift compensation structure, comprising a lens barrel body and a lens bearing part for bearing a lens, wherein the lens barrel body comprises an outer wall and an inner wall, wherein the inner wall surrounds an optical axis to form a lens accommodating space; the lens bearing part comprises a plurality of lens bearing parts which are arranged at intervals on the inner wall of the lens barrel body, and the lens bearing parts extend toward the optical axis.

[0007] Further preferably, the lens bearing parts are evenly distributed on the inner side wall of the lens barrel body.

[0008] Further preferably, the lens bearing portion comprises a lens bearing surface, and the lens bearing surface is perpendicular to the optical axis.

[0009] Further preferably, the number of the lens bearing parts is three, and the three lens bearing parts are evenly distributed on the inner wall of the lens barrel.

[0010] Further preferably, the lens bearing portion has a thickness less than 2 mm.

[0011] Further preferably, the length of the lens carrying portion extending in the direction of the optical axis is greater than the width extending around the direction of the optical axis.

[0012] Further preferably, the lens barrel further comprises a buffer groove, and the buffer groove is arranged at the connection between the lens bearing portion and the inner side wall of the lens barrel body.

[0013] Further preferably, the buffer groove is arranged at the object side end of the lens carrying portion.

[0014] The utility model also provides a lens, comprising the lens barrel and a lens, wherein the lens is mounted on the lens bearing portion.

[0015] The beneficial effects of the utility model are:

[0016] The lens barrel and lens structure provided by the utility model can prevent the optical effective part of the lens from being deformed. By arranging the lens bearing part on the lens barrel, when the lens barrel and the lens expand differently at low or high temperatures, the lens is subjected to an axial extrusion force and the extrusion force is transmitted to the lens bearing part of the lens barrel. The lens bearing part will produce a micro-deformation to prevent the internal lens from being squeezed and causing the image plane to shift. The extrusion force is unloaded by the deformation of the lens bearing part, thereby preventing the optical effective part of the lens from being deformed and improving the imaging quality of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the structure of the lens barrel provided by the utility model;

[0019] Figure 2 for Figure 1 Middle AA section;

[0020] Figure 3 A schematic diagram of the structure of the lens provided by the utility model;

[0021] Illustration: 1-lens barrel body, 2-lens bearing part, 3-lens accommodating space, 4-buffer groove, 5-optical axis.

[0022] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0023] In order to better understand the utility model, a more detailed description of various aspects of the utility model will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of embodiments of the utility model, and do not limit the scope of the utility model in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0025] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present invention, "may" is used to mean "one or more embodiments of the present invention". And, the term "exemplary" is intended to refer to an example or illustration.

[0026] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which the utility model belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] like Figure 1 to Figure 2As shown, the utility model provides a lens barrel with a temperature drift compensation structure, including a lens barrel body 1 and a lens bearing part 2 for bearing a lens, the lens barrel body 1 includes an outer wall and an inner wall, the inner wall surrounds the optical axis 5 to form a lens accommodating space 3, and the lens is arranged in the lens accommodating space 3. The lens bearing part 2 includes a plurality of lens bearing parts that are arranged on the inner wall of the lens barrel body 1 at intervals, and the lens bearing part 2 extends toward the optical axis 5. In order to alleviate the extrusion of the lens by the lens barrel in the axial direction, the present application can avoid the deformation of the optical effective part of the lens by designing the lens bearing part 2 on the lens barrel. In the axial direction, due to the inconsistency of the mean values ​​of the internal lens coefficients of the lens barrel expansion coefficient, when there is a difference in expansion at low or high temperatures, there will be an extrusion in the axial direction. For this reason, when the internal lens is squeezed, the lens is subjected to the extrusion force in the axial direction and the extrusion force is transmitted to the lens bearing part 2 of the lens barrel, and the lens bearing part 2 will produce a micro-deformation to prevent the internal lens from being squeezed and causing the image plane to shift. The extrusion force is unloaded by the deformation of the lens bearing part 2, so that the optical effective part of the lens is prevented from being deformed, and the imaging quality of the lens is improved. It should be noted that the direction parallel to the lens optical axis 5 is defined as the axial direction, and the direction extending along the outer diameter of the lens is defined as the radial direction.

[0029] More specifically, there are three lens bearing parts 2, and the three lens bearing parts 2 are evenly distributed on the inner wall of the lens barrel body 1. The lens evenly transmits the squeezing force to the lens bearing part 2, and the squeezing force in the axial direction on the lens bearing part 2 can be evenly distributed.

[0030] The lens bearing part 2 includes a lens bearing surface, and the lens bearing surface is perpendicular to the optical axis 5, so that the installed lens will not tilt, ensuring the accuracy of the multi-stage lens bearing part 2 and meeting the high-precision requirements.

[0031] In order to make the lens carrying part 2 deform better and relieve the internal stress, the thickness of the lens carrying part 2 is less than 2 mm.

[0032] In order to better deform the lens carrying part 2 under force, the length of the lens carrying part 2 extending toward the optical axis 5 is greater than the width extending around the optical axis 5. It can be understood that the lens carrying part 2 is in the shape of an elongated strip.

[0033] The lens barrel also includes a buffer groove 4, which is arranged at the connection between the lens bearing part 2 and the inner wall of the lens barrel body 1, so as to facilitate the deformation of the lens bearing part 2 and relieve the stress on the optically effective part of the lens; it can be understood that the provision of the buffer groove 4 can lengthen the force arm acting when the lens is squeezed, so that the lens bearing part 2 can be deformed better.

[0034] More specifically, the buffer groove 4 is arranged at the object side end of the lens carrying portion 2. It can be understood that the object side end refers to the end of the lens barrel close to the object side.

[0035] like Figure 3 As shown, the utility model also provides a lens, including the above-mentioned lens barrel and a lens, and the lens is mounted on the lens bearing part 2.

[0036] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A lens barrel with a temperature drift compensation structure, characterized in that: The invention comprises a lens barrel body (1) and a lens bearing part (2) for bearing a lens, wherein the lens barrel body (1) comprises an outer wall and an inner wall, wherein the inner wall surrounds an optical axis (5) to form a lens accommodating space (3); the lens bearing part (2) comprises a plurality of lens bearing parts which are arranged on the inner wall of the lens barrel body (1) at intervals, and the lens bearing part (2) extends in the direction of the optical axis (5); the lens bearing part (2) is in the shape of an elongated strip, and the length of the lens bearing part (2) extending in the direction of the optical axis (5) is greater than the width of the lens bearing part (2) extending in the direction of the optical axis (5); the lens bearing part (2) comprises a lens bearing surface, and the lens bearing surface is perpendicular to the optical axis (5).

2. The lens barrel with a temperature drift compensation structure according to claim 1, characterized in that: The lens bearing parts (2) are evenly distributed on the inner side wall of the lens barrel body (1).

3. The lens barrel with a temperature drift compensation structure according to claim 1, characterized in that: The number of the lens bearing parts (2) is three, and the three lens bearing parts (2) are evenly distributed on the inner wall of the lens barrel.

4. The lens barrel with a temperature drift compensation structure according to claim 1, characterized in that: The lens bearing portion (2) has a thickness of less than 2 mm.

5. The lens barrel with a temperature drift compensation structure according to claim 1, characterized in that: The lens barrel further comprises a buffer groove (4), wherein the buffer groove (4) is arranged at the connection between the lens bearing portion (2) and the inner side wall of the lens barrel body (1).

6. The lens barrel with a temperature drift compensation structure according to claim 5, characterized in that: The buffer groove (4) is arranged at the object side end of the lens bearing portion (2).

7. A lens, characterized in that: It comprises a lens barrel as claimed in any one of claims 1 to 6 and a lens, wherein the lens is mounted on the lens bearing portion (2).

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