Buffer lens and optical lens

Abstract

The utility model provides a buffer lens and an optical lens, the buffer lens comprises an optical effective part and an installation part, and the installation part extends from the optical effective part in a surrounding manner; the mounting part comprises a mounting main body, a notch, a through hole and an elastic arm, the notch is formed in the peripheral side of the mounting main body, the through hole is formed in the mounting main body, is communicated with the notch and is close to the peripheral side of the mounting main body, and the notch and the through hole form the elastic arm with one end connected with the mounting main body; and the elastic arm is arranged on the peripheral side of the mounting main body around the optical axis. According to the buffer lens and the optical lens structure provided by the utility model, the elastic arm structure is arranged on the buffer lens, the buffer lens bears the extrusion force in the radial direction and transmits the extrusion force to the elastic arm, and the elastic arm deforms so as to prevent the surface type and curvature radius change caused by the extrusion of the internal buffer lens. The extrusion force is unloaded through the deformation of the elastic arm, thereby avoiding the deformation of the optical effective part of the buffer lens, and improving the imaging quality of the optical lens.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging optical lenses, in particular to a buffer lens and an optical lens. 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 at 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 the locking ring, front ring, spacer and lens barrel. However, under high or low temperature conditions, due to the different axial and radial expansion and contraction of the lens, spacer and lens barrel, 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 optical lens has a radial expansion greater than the radial expansion of the lens barrel, which causes 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 the position of the imaging surface to change, resulting in a decrease in the resolution of the optical 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 buffer lens and an optical lens, which can avoid deformation of the optically effective part of the buffer 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 buffer lens, comprising an optically effective part for imaging the buffer lens and a mounting part for mounting the buffer lens, wherein the mounting part extends around the optically effective part; the mounting part comprises a mounting body, a notch, a through hole and an elastic arm, wherein the notch is arranged on the outer peripheral side of the mounting body, the through hole is arranged on the mounting body and is connected with the notch and close to the outer peripheral side of the mounting body, the notch and the through hole form the elastic arm with one end connected to the mounting body, and the elastic arm is arranged around the optical axis on the outer peripheral side of the mounting body.

[0007] Further preferably, the notch, the through hole and the elastic arm are all multiple, and the elastic arms are evenly distributed on the outer peripheral side of the installation body at intervals.

[0008] Further preferably, the number of the notch, the through hole and the elastic arm are all three, and the elastic arms are evenly distributed on the outer peripheral side of the installation body.

[0009] Further preferably, the elastic arm protrudes out of the mounting body along the radial direction of the buffer lens.

[0010] Further preferably, the through hole is annular and parallel to the outer circumference of the mounting body.

[0011] Further preferably, a supporting portion is provided on a side of the elastic arm away from the optically effective portion.

[0012] Further preferably, the buffer lens further comprises a buffer lens protrusion, the buffer lens protrusion is arranged on the mounting body, and the buffer lens protrusion protrudes from the surface of the mounting body.

[0013] Further preferably, there are a plurality of buffer lens protrusions, which are evenly spaced around the optically effective portion.

[0014] The utility model also provides an optical lens, comprising the above-mentioned buffer lens, a lens barrel and a spacer, wherein the buffer lens is arranged in the lens barrel, and the elastic arm on the buffer lens abuts against the lens barrel.

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

[0016] The buffer lens and optical lens structure provided by the utility model can avoid deformation of the optical effective part of the buffer lens. An elastic arm structure is arranged on the buffer lens. In the radial direction, when the high-temperature expansion of the buffer lens is greater than the expansion of the lens barrel or the low-temperature contraction of the buffer lens is less than the contraction of the lens barrel, there will be extrusion deformation in the radial direction. The buffer lens is subjected to extrusion force in the radial direction and transmits the extrusion force to the elastic arm. The elastic arm will be deformed to prevent the internal buffer lens from being extruded and causing changes in the surface shape and curvature radius. The extrusion force is unloaded by the deformation of the elastic arm, so that the deformation of the optical effective part of the buffer lens is avoided, and the imaging quality of the optical lens is improved. 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 buffer lens provided by the utility model;

[0019] Figure 2 This is a front view of the buffer lens provided by the utility model;

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

[0021] Illustrations: 1-buffer lens, 11-optically effective part, 12-mounting part, 201-mounting body, 202-notch, 203-through hole, 204-elastic arm, 13-supporting part, 14-buffer lens protrusion, 2-spacer, 3-lens barrel.

[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 and Figure 2 As shown, the utility model provides a buffer lens, comprising an optically effective portion 11 for buffer lens imaging and a mounting portion 12 for mounting the buffer lens, wherein the mounting portion 12 extends around the optically effective portion 11. The mounting portion 12 comprises a mounting body 201, a notch 202, a through hole 203 and an elastic arm 204, wherein the notch 202 is arranged on the outer peripheral side of the mounting body 201, and the through hole 203 is arranged on the mounting body 201 and connected to the notch 202 and close to the outer peripheral side of the mounting body 201. The notch 202 and the through hole 203 form an elastic arm 204 whose one end is connected to the mounting body 201, and the elastic arm 204 is arranged on the outer peripheral side of the mounting body 201 around the optical axis. In order to alleviate the squeezing of the buffer lens by the lens barrel 3 in the radial direction, the present application sets a through hole 203, a notch 202 and an elastic arm 204 structure in the region of the mounting portion 12 of the buffer lens; in the radial direction, when the high-temperature expansion of the buffer lens is greater than the expansion of the lens barrel 3 or the low-temperature contraction of the buffer lens is less than the contraction of the lens barrel 3, there will be extrusion deformation in the radial direction. Since the elastic arm 204 is in contact with the inner wall of the lens barrel 3, the extrusion deformation is concentrated in the region of the elastic arm 204, and the elastic arm 204 plays the role of unloading the extrusion force in the radial direction. Moreover, since the notch 202 and the through hole 203 are set at the position corresponding to the elastic arm 204, the notch 202 and the through hole 203 can also play the role of unloading, and will not transfer the squeezed deformation stress to the optically effective part 11 of the buffer lens, so that the surface shape and curvature radius of the optically effective part 11 of the buffer lens will not change. It should be noted that the direction parallel to the optical axis of the optical lens is defined as the axial direction, and the direction extending along the outer diameter of the buffer lens is defined as the radial direction.

[0029] More specifically, the notch 202, the through hole 203 and the elastic arm 204 are all multiple, preferably three, and the elastic arms 204 are evenly distributed at intervals on the outer peripheral side of the mounting body 201. The buffer lens evenly transmits the squeezing force to the elastic arm 204, and the squeezing force in the radial direction on the elastic arm 204 can be evenly distributed.

[0030] More specifically, the elastic arm 204 protrudes out of the mounting body 201 along the radial direction of the buffer lens, so as to ensure that the elastic arm 204 is in better contact with the lens barrel 3 and is easy to deform.

[0031] The through hole 203 is annular and parallel to the outer circumference of the mounting body 201 , so that the thickness of the elastic arm 204 is uniform.

[0032] In order to ensure that the elastic arm 204 is in better contact with the lens barrel 3 and is easier to deform, a supporting portion 13 is provided on the side of the elastic arm 204 away from the optically effective portion 11 .

[0033] The buffer lens also includes a buffer lens protrusion 14, which is disposed on the mounting body 201 and protrudes from the surface of the mounting body 201. The buffer lens protrusion 14 is used to cooperate with the spacer 2 to prevent the optically effective part 11 from directly contacting the spacer 2 and causing changes in the surface shape and curvature radius.

[0034] More specifically, there are a plurality of buffer lens protrusions 14 , which are evenly spaced around the optically effective portion 11 , so that the buffer lens is subjected to uniform force.

[0035] like Figure 3 As shown, the utility model further provides an optical lens, including the above-mentioned buffer lens, as well as a lens barrel 3 and a spacer 2. The buffer lens 1 is arranged in the lens barrel 3, and the elastic arm 204 on the buffer lens abuts against the lens barrel 3.

[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 buffer lens, characterized in that: The invention comprises an optically effective part (11) and a mounting part (12), wherein the mounting part (12) extends circumferentially from the optically effective part (11); the mounting part (12) comprises a mounting body (201), a notch (202), a through hole (203) and an elastic arm (204), wherein the notch (202) is arranged on the outer peripheral side of the mounting body (201), the through hole (203) is arranged on the mounting body (201) and is connected to the notch (202) and close to the outer peripheral side of the mounting body (201), the notch (202) and the through hole (203) form the elastic arm (204) having one end connected to the mounting body (201), and the elastic arm (204) is arranged on the outer peripheral side of the mounting body (201) around the optical axis.

2. A buffer lens according to claim 1, characterized in that: The notch (202), the through hole (203) and the elastic arm (204) are all multiple, and the elastic arms (204) are evenly distributed at intervals on the outer peripheral side of the installation body (201).

3. A buffer lens according to claim 1, characterized in that: The number of the notch (202), the through hole (203) and the elastic arm (204) is three, and the elastic arms (204) are evenly distributed at intervals on the outer peripheral side of the installation body (201).

4. The buffer lens according to claim 1, characterized in that: The elastic arm (204) protrudes from the mounting body (201) along the radial direction of the buffer lens.

5. The buffer lens according to claim 1, characterized in that: The through hole (203) is annular and parallel to the outer peripheral side of the installation body (201).

6. The buffer lens according to claim 1, characterized in that: A supporting portion (13) is provided on the side of the elastic arm (204) in a direction away from the optically effective portion (11).

7. The buffer lens according to claim 1, characterized in that: The buffer lens further comprises a buffer lens protrusion (14), wherein the buffer lens protrusion (14) is arranged on the mounting body (201), and the buffer lens protrusion (14) protrudes from the surface of the mounting body (201).

8. The buffer lens according to claim 7, characterized in that: The buffer lens protrusions (14) are multiple and are evenly spaced around the optically effective portion (11).

9. An optical lens, characterized in that: It comprises a buffer lens as claimed in any one of claims 1 to 8, a lens barrel (3) and a spacer (2), wherein the buffer lens is arranged in the lens barrel (3), and the elastic arm (204) on the buffer lens abuts against the lens barrel (3).

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