Laser attenuation adjustment module

Abstract

The utility model discloses a laser attenuation adjustment module, including a base, a gradual adjustment mechanism and a switching adjustment mechanism, wherein a cavity is arranged in the base, a light inlet and a light outlet are arranged on the base, and a light path is formed between the light inlet and the light outlet; the gradual adjustment mechanism includes a wedge-shaped attenuation mirror body, the wedge-shaped attenuation mirror body is movably arranged in the cavity and located on the light path, and the moving direction of the wedge-shaped attenuation mirror body is the same as the thickness change direction thereof; the switching adjustment mechanism includes an attenuation flat lens, the attenuation flat lens is movably arranged in the cavity, so that the attenuation flat lens is located on the light path or outside the light path. By moving the wedge-shaped attenuation mirror body, the thickness of the laser beam passing through the wedge-shaped attenuation mirror body changes, thereby realizing the gradual adjustment of the attenuation rate.

Description

Technical Field

[0001] The utility model relates to the technical field of optical test devices, in particular to a laser attenuation adjustment module. Background Art

[0002] In some optical test systems, it is sometimes necessary to attenuate the laser beam to below the loss threshold of an optical component (such as a digital camera sensor) to avoid damage. Currently, most approaches place one or more attenuating lenses in the laser beam's optical path. The attenuation factors of the multiple attenuating lenses are multiplied together to form the final attenuation rate. When the attenuation rate needs to be changed, the attenuation rate is adjusted by switching or replacing the attenuating lenses. However, current adjustments to the attenuation rate involve abrupt changes from one value to another, resulting in large fluctuations. This makes gradual adjustments difficult and unsuitable for practical applications. Utility Model Content

[0003] In view of this, the present invention proposes a laser attenuation adjustment module, which can achieve gradual attenuation adjustment of the laser beam.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A laser attenuation adjustment module, comprising:

[0006] A base body, wherein a cavity is provided in the base body, a light inlet and a light outlet are provided on the base body, and a light path is formed between the light inlet and the light outlet;

[0007] a gradual adjustment mechanism, the gradual adjustment mechanism comprising a wedge-shaped attenuation mirror body, the wedge-shaped attenuation mirror body being movably disposed in the cavity and located on the light path, the movement direction of the wedge-shaped attenuation mirror body being the same as the direction in which its thickness changes;

[0008] A switchable adjustment mechanism includes an attenuation flat lens, which is movably arranged in the cavity so that the attenuation flat lens is located on the light path or outside the light path.

[0009] As a further optional solution of the laser attenuation adjustment module, the gradual adjustment mechanism includes a gradual coarse adjustment mechanism and a gradual fine adjustment mechanism;

[0010] The gradual coarse adjustment mechanism includes a first bracket and a first wedge-shaped attenuation mirror body provided on the first bracket. The base body is provided with a first limiting groove, and the first bracket is slidably provided in the first limiting groove. The base body is provided with a first strip-shaped guide hole, and the first bracket is provided with a first shift block, which is inserted into the first guide hole.

[0011] The gradual fine-tuning mechanism includes a second bracket, a second wedge-shaped attenuation mirror body and a support. The second wedge-shaped attenuation mirror body is arranged on the second bracket, and the second bracket is slidably arranged on the support. The support is arranged in the cavity and a rotatable screw is provided on the support. The screw is threadedly connected to the second bracket.

[0012] As a further optional solution for the laser attenuation adjustment module, the switchable adjustment mechanism includes a third bracket, the attenuation flat lens is arranged on the third bracket, a second limiting groove is provided in the base, the third bracket is slidably arranged in the second limiting groove, a second strip-shaped guide hole is provided on the base, and a second shift block is provided on the third bracket, and the second shift block is passed through the second guide hole.

[0013] As a further optional solution of the laser attenuation adjustment module, a strip-shaped limiting hole is provided on the base, and a limiting block is provided on the second bracket, and the limiting block is slidably arranged on the limiting hole.

[0014] As a further optional solution of the laser attenuation adjustment module, one end of the screw rod passes through the outside of the base body, and a screwing portion is provided on the portion of the screw rod outside the base body.

[0015] As a further optional solution of the laser attenuation adjustment module, the light inlet and / or the light outlet are both provided with internal threads.

[0016] The beneficial effects of the present invention include: integrating the gradual adjustment mechanism and the switchable adjustment mechanism into one module, wherein the thickness of the laser beam passing through the wedge-shaped attenuation mirror body changes by moving the wedge-shaped attenuation mirror body, thereby achieving gradual adjustment of the attenuation rate; in addition, the attenuation flat lens on the switchable adjustment mechanism can switch between two states of being located on the light path or being located outside the light path, thereby achieving a large change in the attenuation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural diagram of a laser attenuation adjustment module of the present utility model;

[0019] Figure 2 It is an explosion of a laser attenuation adjustment module of the utility model;

[0020] Figure 3 It is a schematic diagram of the structures of the gradual coarse adjustment mechanism, the gradual fine adjustment mechanism and the switching adjustment mechanism;

[0021] Figure 4 is an exploded schematic diagram of the gradual fine-tuning mechanism;

[0022] Figure 5 This is a sectional top view of a laser attenuation adjustment module of the present invention.

[0023] In the figure: 1. base; 11. light inlet; 12. light outlet; 13. first limiting groove; 14. second limiting groove; 15. first guide hole; 16. second guide hole; 17. limiting hole; 2. gradual coarse adjustment mechanism; 21. first wedge-shaped attenuation mirror body; 22. first bracket; 221. first shift block; 3. gradual fine adjustment mechanism; 31. second wedge-shaped attenuation mirror body; 32. second bracket; 321. limiting block; 33. support; 34. screw; 341. screwing part; 4. switchable adjustment mechanism; 41. attenuation flat lens; 42. third bracket; 421. second shift block. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] refer to Figure 1-5 , shows a laser attenuation adjustment module, including a base 1, a gradual adjustment mechanism and a switching adjustment mechanism 4; the base 1 is provided with a cavity, and the base 1 is provided with a light inlet 11 and a light outlet 12, and a light path is formed between the light inlet 11 and the light outlet 12; the gradual adjustment mechanism includes a wedge-shaped attenuation mirror body, which is movably arranged in the cavity and located on the light path, and the moving direction of the wedge-shaped attenuation mirror body is the same as the direction of change of its thickness; the switching adjustment mechanism 4 includes an attenuation flat lens 41, which is movably arranged in the cavity so that the attenuation flat lens 41 is located on the light path or outside the light path.

[0029] Among them, the wedge-shaped attenuation mirror is a wedge-shaped mirror with attenuation function. By moving the wedge-shaped attenuation mirror, the thickness of the laser beam passing through the wedge-shaped attenuation mirror changes, thereby realizing gradual adjustment of the attenuation rate; in addition, the attenuation flat mirror 41 on the switchable adjustment mechanism 4 can switch between two states of being located on the light path or being located outside the light path, which can realize a large change in the attenuation rate.

[0030] Among them, the gradual adjustment mechanism can be set to multiple, that is, multiple wedge-shaped attenuation mirrors are distributed on the light path; the arrangement order of the gradual adjustment mechanism and the switching adjustment mechanism 4 on the light path is not limited.

[0031] In some specific embodiments, reference Figure 2-5The gradual adjustment mechanism includes a gradual coarse adjustment mechanism 2 and a gradual fine adjustment mechanism 3; the gradual coarse adjustment mechanism 2 includes a first bracket 22 and a first wedge-shaped attenuation mirror body 21 arranged on the first bracket 22, a first limiting groove 13 is provided in the base 1, and the first bracket 22 is slidably arranged in the first limiting groove 13, a first strip-shaped guide hole 15 is provided on the base 1, and a first shift block 221 is provided on the first bracket 22, and the first shift block 221 is passed through the first guide hole 15; the gradual fine adjustment mechanism 3 includes a second bracket 32, a second wedge-shaped attenuation mirror body 31 and a support 33, the second wedge-shaped attenuation mirror body 31 is arranged on the second bracket 32, and the second bracket 32 ​​is slidably arranged on the support 33, the support 33 is arranged in the cavity and a rotatable screw 34 is provided on the support 33, and the screw 34 is threadedly connected to the second bracket 32.

[0032] Specifically, the first shift block 221 can be shifted to move the first shift block 221 in the first guide hole 15, driving the first bracket 22 to move in the first limiting groove 13, thereby achieving coarse adjustment of the attenuation rate; and the second bracket 32 ​​can be moved on the support 33 along the axial direction of the screw 34 by rotating the screw 34, thereby achieving fine adjustment of the attenuation rate; in this way, by performing coarse adjustment through the gradual coarse adjustment mechanism 2, the adjustment efficiency of the attenuation rate can be improved, and by performing fine adjustment through the gradual fine adjustment mechanism 3, the adjustment accuracy of the attenuation rate can be improved.

[0033] Preferably, Figure 1 and Figure 3 As shown, the base 1 is provided with a strip-shaped limiting hole 17, and the second bracket 32 ​​is provided with a limiting block 321, which is slidably mounted on the limiting hole 17. In this manner, the limiting hole 17 limits the limiting block 321, further improving the stability of the second bracket 32 ​​during movement. Furthermore, the user can easily determine the position of the second wedge-shaped attenuation mirror 31 by observing the position of the limiting block 321 within the limiting hole 17.

[0034] Preferably, Figure 2-5 As shown, one end of the screw rod 34 passes through the base 1, and the portion of the screw rod 34 outside the base 1 is provided with a screwing portion 341. The screwing portion 341 allows the user to manually rotate the screw rod 34 directly without using tools, thereby facilitating operation.

[0035] In some specific embodiments, reference Figure 1 、 Figure 3 and Figure 5The switchable adjustment mechanism 4 includes a third bracket 42, the attenuated flat lens 41 is arranged on the third bracket 42, a second limiting groove 14 is provided in the base 1, and the third bracket 42 is slidably set in the second limiting groove 14, a second strip-shaped guide hole 16 is provided on the base 1, and a second shift block 421 is provided on the third bracket 42, and the second shift block 421 is passed through the second guide hole 16.

[0036] Specifically, the second shifting block 421 can be shifted to move the third bracket 42 along the second limiting groove 14 , so that the attenuation flat lens 41 enters the light path or leaves the light path.

[0037] In some specific embodiments, reference Figure 1 and Figure 5 The light inlet 11 and / or the light outlet 12 are both provided with internal threads. Thus, an attenuation lens can be installed at the light inlet 11 and / or the light outlet 12 to increase the attenuation rate in order to meet higher attenuation requirements.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser attenuation adjustment module, characterized in that: include: A substrate, wherein a cavity is provided in the substrate, a light inlet and a light outlet are provided on the substrate, and a light path is formed between the light inlet and the light outlet; A gradual adjustment mechanism, the gradual adjustment mechanism comprising a wedge-shaped attenuation mirror body, the wedge-shaped attenuation mirror body is movably arranged in the cavity and located on the light path, and the moving direction of the wedge-shaped attenuation mirror body is the same as the thickness change direction thereof; A switchable adjustment mechanism comprises an attenuation flat lens, and the attenuation flat lens is movably arranged in the cavity so that the attenuation flat lens is located on the light path or outside the light path.

2. The laser attenuation adjustment module according to claim 1, characterized in that: The gradual adjustment mechanism includes a gradual coarse adjustment mechanism and a gradual fine adjustment mechanism; The gradual coarse adjustment mechanism comprises a first bracket and a first wedge-shaped attenuation mirror body arranged on the first bracket, a first limiting groove is arranged in the base body, the first bracket is slidably arranged in the first limiting groove, a first strip-shaped guide hole is arranged on the base body, a first shifting block is arranged on the first bracket, and the first shifting block is passed through the first guide hole; The gradual fine-tuning mechanism includes a second bracket, a second wedge-shaped attenuation mirror body and a support, the second wedge-shaped attenuation mirror body is arranged on the second bracket, the second bracket is slidably arranged on the support, the support is arranged in the cavity and a rotatable screw is provided on the support, and the screw is threadedly connected to the second bracket.

3. The laser attenuation adjustment module according to claim 2, characterized in that: The switchable adjustment mechanism includes a third bracket, the attenuation flat lens is arranged on the third bracket, a second limiting groove is arranged in the base body, the third bracket is slidably arranged in the second limiting groove, a second strip-shaped guide hole is arranged on the base body, and a second shift block is arranged on the third bracket, and the second shift block is passed through the second guide hole.

4. The laser attenuation adjustment module according to claim 2, characterized in that: The base is provided with a strip-shaped limiting hole, the second bracket is provided with a limiting block, and the limiting block is slidably arranged on the limiting hole.

5. The laser attenuation adjustment module according to claim 2, characterized in that: One end of the screw rod passes through the base, and a screwing portion is provided on the portion of the screw rod outside the base.

6. The laser attenuation adjustment module according to any one of claims 1 to 5, characterized in that: The light inlet and / or the light outlet are both provided with internal threads.

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