Lens supporting structure and lens

Abstract

The present invention relates to the field of optical devices, and specifically to a lens supporting structure and a lens. The structure comprises an abutting lens and a lens barrel, wherein the abutting lens is arranged on the inner wall of the lens barrel, and an abutting platform is also arranged on the abutting lens, and the abutting platform is arranged around the outer side of the abutting lens, and the abutting lens abuts against the inner wall of the lens barrel through the abutting platform; along the axial direction of the lens barrel, a preset distance is provided between the center plane of the abutting platform and the center plane of the abutting lens. By setting the offset abutting platform, the force position of the abutting lens is changed, thereby reducing the magnitude of the force on the curved surfaces on both sides, thereby reducing the axial deformation of the lens, facilitating the imaging of the lens, and improving the imaging quality of the lens.

Description

Technical Field

[0001] The invention relates to the field of optical devices, in particular to a lens supporting structure and a lens. Background Art

[0002] At present, the plastic abutment lenses in the wave-plastic hybrid lenses designed and produced on the market have the problem of temperature drift under high temperatures. The main manifestation is that the plastic abutment lenses undergo large deformations or even irreversible deformations under high temperatures, causing the entire lens system to be unable to form images normally, thus leading to production failure.

[0003] The main reason for this problem is due to Figure 1 As shown, the abutting lens is directly assembled into the lens barrel, and is usually subjected to axial force and radial force along the optical axis. The former mainly comes from the locking force of the pressure ring and the pressure of expansion or contraction in the front-to-back direction, and the latter mainly comes from the pressure between the outer diameter of the abutting lens and the lens barrel after the temperature changes. In addition, the abutting lens is asymmetric both radially and axially, which results in a large deformation of the abutting lens, making it difficult for the lens to form an image, thereby reducing the imaging quality of the lens. Summary of the invention

[0004] The present invention will solve the existing technical problems and provide a lens supporting structure and a lens. By setting an offset abutment platform, the force position of the abutment lens is changed, thereby reducing the magnitude of the force acting on the curved surfaces on both sides, thereby reducing the axial deformation of the lens, facilitating lens imaging, and improving the imaging quality of the lens.

[0005] The technical solution provided by the present invention is as follows:

[0006] A lens supporting structure comprises an abutting lens and a lens barrel, wherein the abutting lens is arranged on the inner wall of the lens barrel, and an abutting platform is also arranged on the abutting lens, and the abutting platform is arranged around the outer side of the abutting lens, and the abutting lens abuts against the inner wall of the lens barrel through the abutting platform;

[0007] Along the axial direction of the lens barrel, a preset distance is provided between the central plane of the abutting platform and the central plane of the abutting lens.

[0008] In the present technical solution, since the thickness of the abutting lens varies greatly in the radial direction, the thickness difference of the curved surfaces on the left and right sides of the abutting lens is relatively large, the inner wall of the lens barrel exerts a relatively large force on the curved surface of the abutting lens, and the axial deformation of the abutting lens is relatively large. Therefore, by setting an offset abutting platform, the force position of the abutting lens is changed, thereby reducing the magnitude of the force exerted on the curved surfaces on both sides, thereby reducing the axial deformation of the lens, facilitating lens imaging, and improving the imaging quality of the lens.

[0009] Preferably, the abutment lens includes a non-sensitive surface and a sensitive surface, the distance between the non-sensitive surface and the center plane of the abutment lens is greater than the distance between the sensitive surface and the center plane of the abutment lens, and the center plane of the abutment platform is arranged on the side of the center plane of the abutment lens close to the non-sensitive surface.

[0010] In the present technical solution, by setting the abutment platform at one end of the non-sensitive surface, the pressure on the non-sensitive surface is increased and the pressure on the sensitive surface is reduced. Therefore, the maximum stress on the abutment lens is reduced, and then the axial deformation of the abutment lens is reduced, which facilitates lens imaging and improves the imaging quality of the lens.

[0011] Preferably, along the axial direction of the lens barrel, the length of the abutment platform is smaller than the length of the abutment lens.

[0012] In the present technical solution, by reducing the length of the abutment platform, the length of the abutment platform close to the sensitive surface is reduced, which further reduces the pressure received by the sensitive surface, further reduces the deformation of the sensitive surface, reduces the maximum stress received by the abutment lens, and then reduces the axial deformation of the abutment lens, thereby facilitating lens imaging and improving the imaging quality of the lens.

[0013] Preferably, the abutment platform is connected to the abutment lens via a first chamfer.

[0014] In this technical solution, by setting the first chamfer, the center plane position of the abutment platform is not shifted and the cross-sectional area of ​​the abutment platform along the radial direction of the abutment lens does not need to be increased, thereby reducing the pressure of the abutment platform and the possibility of damage to the abutment platform.

[0015] Preferably, a first supporting platform is provided on one side of the abutting lens, and a second supporting platform is provided on the other side of the abutting lens;

[0016] The first supporting platform abuts against the first supporting surface of the abutting lens, and the second supporting platform abuts against the second supporting surface of the abutting lens;

[0017] The lens supporting structure satisfies the following conditional formula:

[0018] 0.95<R1 / R2<1.05;

[0019] Wherein, R1 is the radius of the center position of the first bearing surface, and R2 is the radius of the center position of the second bearing surface.

[0020] In the present technical solution, when the abutting lens undergoes axial deformation, since the abutting lens abuts the first abutting platform and the second abutting platform on the first supporting surface and the second supporting surface respectively, the first abutting platform and the second abutting platform will further cause deformation to the abutting lens. By limiting the radius of the center position of the first supporting surface and the second supporting surface, the possibility of the abutting lens receiving radial pressure from the first supporting surface and the second supporting surface is further reduced, thereby reducing the possibility of radial deformation of the abutting lens.

[0021] Preferably, the lens supporting structure satisfies the following conditional formula:

[0022] R1=R2.

[0023] In the present technical solution, when the processing accuracy of the abutting lens and the lens barrel is high, and the assembly accuracy of the abutting lens and the lens barrel is high, the limitation of the above conditions further reduces the possibility of the abutting lens receiving radial pressure from the first supporting surface and the second supporting surface, thereby reducing the possibility of radial deformation of the abutting lens.

[0024] Preferably, an adjustment groove is provided on the abutting lens, and the adjustment groove is opened on the abutting lens along a direction perpendicular to the axis of the lens barrel.

[0025] In the present technical solution, by setting the adjustment groove, it is convenient to adjust the width of the first supporting surface and the second supporting surface, and then it is convenient to adjust the difference in width between the first supporting surface and the second supporting surface, further reducing the possibility of the abutting lens receiving radial pressure from the first supporting surface and the second supporting surface, and then reducing the possibility of radial deformation of the abutting lens.

[0026] Preferably, the edge of the adjustment groove is connected to the abutting lens via a second chamfer.

[0027] In the technical solution, by setting the second chamfer, the possibility of damage to the edge of the adjustment groove is reduced, and the possibility of excessive stress at the edge of the adjustment groove is also reduced.

[0028] Another object of the present invention is to provide a lens, including a lens supporting structure.

[0029] Compared with the prior art, the lens supporting structure and lens provided by the present invention have the following beneficial effects:

[0030] 1. Since the thickness of the abutting lens varies greatly in the radial direction, the thickness difference of the curved surfaces on the left and right sides of the abutting lens is relatively large, the inner wall of the lens barrel exerts a relatively large force on the curved surface of the abutting lens, and the axial deformation of the abutting lens is relatively large. Therefore, by setting an offset abutting platform, the force position of the abutting lens is changed, thereby reducing the magnitude of the force exerted on the curved surfaces on both sides, thereby reducing the axial deformation of the lens, facilitating lens imaging, and improving the imaging quality of the lens.

[0031] 2. By setting the abutment platform at one end of the non-sensitive surface, the pressure on the non-sensitive surface is increased and the pressure on the sensitive surface is reduced. Therefore, the maximum stress on the abutment lens is reduced, and then the axial deformation of the abutment lens is reduced, which facilitates lens imaging and improves the imaging quality of the lens.

[0032] 3. By reducing the length of the abutment platform, the length of the abutment platform close to the sensitive surface is reduced, which further reduces the pressure received by the sensitive surface, further reduces the deformation of the sensitive surface, reduces the maximum stress received by the abutment lens, and then reduces the axial deformation of the abutment lens, which facilitates lens imaging and improves the imaging quality of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The preferred implementation scheme will be described below in a clear and understandable manner in conjunction with the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of a lens supporting structure and a lens.

[0034] Figure 1 This is a schematic diagram of the structure of a lens supporting structure before improvement of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of an improved lens supporting structure of the present invention;

[0036] Figure 3 yes Figure 2 Enlarged view of point A.

[0037] Explanation of the accompanying drawings: 1. abutting lens; 11. first supporting surface; 12. second supporting surface; 2. lens barrel; 3. abutting platform; 31. first chamfer; 4. adjusting groove; 41. second chamfer; 5. first supporting platform; 6. second supporting platform. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0040] Example 1

[0041] A lens supporting structure comprises an abutting lens 1 and a lens barrel 2, wherein the abutting lens 1 is arranged on the inner wall of the lens barrel 2. In this embodiment, abutting lenses 1 can be arranged in plurality, and any lens in the lens barrel 2 can serve as the abutting lens 1 in this embodiment.

[0042] The abutting lens 1 is further provided with an abutting platform 3 , which is arranged around the outer side of the abutting lens 1 . The abutting lens 1 abuts against the inner wall of the lens barrel 2 through the abutting platform 3 .

[0043] Along the axial direction of the lens barrel 2 , a preset distance is provided between the central plane of the abutting platform 3 and the central plane of the abutting lens 1 , that is, in this embodiment, the middle of the abutting platform 3 does not overlap with the middle of the abutting lens 1 .

[0044] In this embodiment, since the thickness of the abutting lens 1 in the radial direction varies greatly, the thickness difference of the curved surfaces on the left and right sides of the abutting lens 1 is relatively large, the inner wall of the lens barrel 2 exerts a relatively large force on the curved surface of the abutting lens 1, and the axial deformation of the abutting lens 1 is relatively large. Therefore, by setting the offset abutting platform 3, the force position of the abutting lens 1 is changed, thereby reducing the magnitude of the force exerted on the curved surfaces on both sides, thereby reducing the axial deformation of the lens, facilitating lens imaging, and improving the imaging quality of the lens.

[0045] The abutting lens 1 includes a non-sensitive surface and a sensitive surface, the distance between the non-sensitive surface and the center plane of the abutting lens 1 is greater than the distance between the sensitive surface and the center plane of the abutting lens 1, and the center plane of the abutting platform 3 is arranged on the side of the center plane of the abutting lens 1 close to the non-sensitive surface.

[0046] By setting the abutment platform 3 at one end of the non-sensitive surface, the pressure on the non-sensitive surface is increased and the pressure on the sensitive surface is reduced. Therefore, the maximum stress on the abutment lens 1 is reduced, and then the axial deformation of the abutment lens 1 is reduced, which facilitates lens imaging and improves the imaging quality of the lens.

[0047] Along the axial direction of the lens barrel 2 , the length of the abutting platform 3 is smaller than the length of the abutting lens 1 .

[0048] By reducing the length of the abutment platform 3, the length of the abutment platform 3 close to the sensitive surface is reduced, which further reduces the pressure received by the sensitive surface, further reduces the deformation of the sensitive surface, reduces the maximum stress received by the abutment lens 1, and then reduces the axial deformation of the abutment lens 1, which facilitates lens imaging and improves the imaging quality of the lens.

[0049] The abutting platform 3 is connected to the abutting lens 1 via a first chamfer 31 .

[0050] By setting the first chamfer 31 , the center plane position of the abutting platform 3 is not shifted and the radial cross-sectional area of ​​the abutting platform 3 along the abutting lens 1 does not need to be increased, thereby reducing the pressure of the abutting platform 3 and the possibility of damage to the abutting platform 3.

[0051] A first supporting platform 5 is provided on one side of the abutting lens 1, and a second supporting platform 6 is provided on the other side of the abutting lens 1. Specifically, in this embodiment, the lenses and the lens barrel 2 on the left and right sides of the abutting lens 1 can all serve as the first supporting platform 5 and the second supporting platform 6 described in this embodiment, and the first supporting platform 5 and the second supporting platform 6 only need to abut against the abutting lens 1.

[0052] The first supporting platform 5 is in contact with the first supporting surface 11 of the abutting lens 1, and the second supporting platform 6 is in contact with the second supporting surface 12 of the abutting lens 1;

[0053] The lens supporting structure satisfies the following conditional formula:

[0054] 0.95<R1 / R2<1.05;

[0055] Wherein, R1 is the radius of the center position of the first bearing surface 11 , and R2 is the radius of the center position of the second bearing surface 12 .

[0056] When the abutting lens 1 undergoes axial deformation, since the abutting lens 1 abuts against the first abutting platform 3 and the second abutting platform 3 on the first supporting surface 11 and the second supporting surface 12 respectively, the first abutting platform 3 and the second abutting platform 3 will further cause deformation to the abutting lens 1. By limiting the radius of the center position of the first supporting surface 11 and the second supporting surface 12, the possibility of the abutting lens 1 receiving radial pressure from the first supporting surface 11 and the second supporting surface 12 is further reduced, thereby reducing the possibility of radial deformation of the abutting lens 1.

[0057] The lens supporting structure satisfies the following conditional formula:

[0058] R1=R2.

[0059] When the processing accuracy of the abutting lens 1 and the lens barrel 2 is high, and the assembly accuracy of the abutting lens 1 and the lens barrel 2 is high, the above conditions are limited, which further reduces the possibility that the abutting lens 1 receives radial pressure from the first supporting surface 11 and the second supporting surface 12, thereby reducing the possibility of radial deformation of the abutting lens 1.

[0060] The contact lens 1 is provided with an adjustment groove 4 , and the adjustment groove 4 is opened on the contact lens 1 along a direction perpendicular to the axis of the lens barrel 2 .

[0061] In this embodiment, by setting the adjustment groove 4, it is convenient to adjust the width of the first supporting surface 11 and the second supporting surface 12, and then it is convenient to adjust the difference in width between the first supporting surface 11 and the second supporting surface 12, thereby further reducing the possibility that the abutting lens 1 receives radial pressure from the first supporting surface 11 and the second supporting surface 12, and then reducing the possibility of radial deformation of the abutting lens 1.

[0062] The edge of the adjustment groove 4 is connected to the abutting lens 1 via a second chamfer 41 .

[0063] The second chamfer 41 is provided to reduce the possibility of damage to the edge of the adjusting groove 4 and also reduce the possibility of excessive stress on the edge of the adjusting groove 4 .

[0064] Example 2

[0065] A lens such as Figure 2 and Figure 3 As shown, it includes the lens supporting structure described in the above embodiment.

[0066] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A lens supporting structure, characterized in that: The invention comprises an abutting lens and a lens barrel, wherein the abutting lens is arranged on the inner wall of the lens barrel, and an abutting platform is also arranged on the abutting lens, and the abutting platform is arranged around the outer side of the abutting lens, and the abutting lens abuts against the inner wall of the lens barrel through the abutting platform; Along the axis direction of the lens barrel, a preset distance is provided between the central plane of the abutting platform and the central plane of the abutting lens; The abutting lens comprises a non-sensitive surface and a sensitive surface, the distance between the non-sensitive surface and the central surface of the abutting lens is greater than the distance between the sensitive surface and the central surface of the abutting lens, and the central surface of the abutting platform is arranged on a side of the central surface of the abutting lens close to the non-sensitive surface; Along the axial direction of the lens barrel, the length of the abutment platform is smaller than the length of the abutment lens; The abutment platform is connected to the abutment lens via a first chamfer; A first supporting platform is provided on one side of the abutting lens, and a second supporting platform is provided on the other side of the abutting lens; The first supporting platform abuts against the first supporting surface of the abutting lens, and the second supporting platform abuts against the second supporting surface of the abutting lens; The lens supporting structure satisfies the following conditional formula: 0.95<R1 / R2<1.05; Wherein, R1 is the radius of the center position of the first bearing surface, and R2 is the radius of the center position of the second bearing surface.

2. A lens supporting structure according to claim 1, characterized in that: The lens supporting structure satisfies the following conditional formula: R1=R2.

3. A lens supporting structure according to claim 1, characterized in that: The abutting lens is provided with an adjustment groove, and the adjustment groove is opened on the abutting lens along a direction perpendicular to the axis of the lens barrel.

4. A lens supporting structure according to claim 3, characterized in that: The edge of the adjustment groove is connected to the abutting lens through a second chamfer.

5. A lens, comprising the lens supporting structure according to any one of claims 1 to 4.

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