Optical-mechanical system

Abstract

The utility model discloses an optical-mechanical system, and belongs to the technical field of light propagation, the optical-mechanical system comprises a light uniformizing unit, a light spot adjusting unit and a spatial light modulator which are sequentially and coaxially arranged along a light beam propagation direction, the light uniformizing unit is used for uniformizing a passing light beam to form a light spot with a predetermined shape, and the light spot adjusting unit is used for adjusting the light spot; the light spot adjusting unit is used for performing displacement adjustment on the light beams emitted by the light homogenizing unit; the light spot adjusting unit comprises a lens, a first auxiliary part, a second auxiliary part, a first adjusting part and a second adjusting part, the lens is fixedly arranged on the second auxiliary part, and the second auxiliary part is movably connected with the first auxiliary part; the first adjusting part is movably connected with the first auxiliary part and used for driving the first auxiliary part to move in the first direction relative to the light uniformizing unit so as to drive the lens to move in the first direction, and the second adjusting part is movably connected with the second auxiliary part and used for driving the second auxiliary part to move in the second direction relative to the first auxiliary part. The adjusting assembly adjusts the position of the lens, so that the accuracy of adjusting the light spot position of the spatial light modulator is improved.

Description

Technical Field

[0001] This application relates to the field of light propagation technology, and more particularly, to an optical engine system. Background Art

[0002] In an optical engine projection system, a Digital Micromirror Device (DMD) is a key component, also known as a spatial light modulator. It is usually composed of a series of tiny mirrors and is used to control the reflection and projection of light. The effective area on the DMD refers to the area that can be used to control light. Currently, adjusting the spot position of the effective area on the DMD by adjusting the mirror module is difficult and costly. Summary of the Utility Model

[0003] This application proposes an optical engine system to improve the above defects.

[0004] In a first aspect, this application provides an optical engine system, including: a light homogenizing unit, a spot adjusting unit, and a spatial light modulator that are sequentially coaxially arranged along the light beam propagation direction. The light homogenizing unit is used to homogenize the passing light beam to form a light spot with a predetermined shape. The spot adjusting unit is used to adjust the displacement of the light beam emitted by the light homogenizing unit so that the light beam irradiates a preset position on the spatial light modulator. The spot adjusting unit includes a lens, a first auxiliary member, a second auxiliary member, a first adjusting member, and a second adjusting member. Among them, the lens is fixedly arranged on the second auxiliary member, and the second auxiliary member is movably connected to the first auxiliary member. The first adjusting member is movably connected to the first auxiliary member and is used to drive the first auxiliary member to move relative to the light homogenizing unit along a first direction, thereby driving the lens fixedly arranged on the second auxiliary member to move relative to the light homogenizing unit along the first direction. The second adjusting member is movably connected to the second auxiliary member and is used to drive the second auxiliary member to move relative to the first auxiliary member along a second direction. Through the above adjustments of the first adjusting member and the second adjusting member, the spot adjusting unit can adjust the displacement of the light beam emitted by the light homogenizing unit so that the light beam irradiates the preset position on the spatial light modulator.

[0005] Optionally, for a possible implementation manner, the light homogenizing unit includes a fixing member and a square rod fixed on the fixing member. The spot adjusting unit is connected to the fixing member through the first auxiliary member, and the light beam passes through the square rod and the lens and is transmitted to the spatial light modulator.

[0006] Optionally, for a possible implementation, it further includes: a first positioning member disposed on the fixing member; the first adjusting member is a first screw; the fixing member has a first limiting hole, and the first auxiliary member has a first threaded hole corresponding to the first limiting hole. The first screw passes through the first limiting hole and is connected to the first threaded hole. The axis of the first screw is parallel to the first direction. The first positioning member is used to limit the movement of the first screw in the first direction. When the first screw is twisted, the first auxiliary member is adjusted to move along the first direction.

[0007] Optionally, for a possible implementation, it further includes: a second positioning member disposed on the second auxiliary member; the second adjusting member is a second screw; the second auxiliary member has a second limiting hole, and the first auxiliary member has a second threaded hole corresponding to the second limiting hole. The second screw passes through the second limiting hole and is connected to the second threaded hole. The axis of the second screw is parallel to the second direction. The second positioning member is used to limit the movement of the second screw in the second direction. When the second screw is twisted, the second auxiliary member is adjusted to move along the second direction.

[0008] Optionally, for a possible implementation, it further includes: a stepped screw; the second auxiliary member has at least one third limiting hole, and the fixing member has a positioning post corresponding to the third limiting hole. Each end face of the positioning post is provided with a third threaded hole. The stepped screw passes through the third limiting hole and is fixedly connected to the third threaded hole; the stepped screw clamps the lens between the nut and the second auxiliary member to limit the movement of the lens in the third direction. The outer diameter of the step of the stepped screw is smaller than the inner diameter of the third limiting hole. The third direction is perpendicular to the first direction and perpendicular to the second direction.

[0009] Optionally, for a possible implementation, the first screw is sleeved with a first spring, and the first spring is clamped between the nut of the first screw and the fixing member; the second screw is sleeved with a second spring, and the second spring is clamped between the nut of the second screw and the second auxiliary member; the stepped screw is sleeved with a third spring, and the third spring is clamped between the nut of the stepped screw and the second auxiliary member.

[0010] Optionally, for a possible implementation, a first limiting member is provided on one side of the fixing member facing the first auxiliary member, and a second limiting member is provided on one side of the first auxiliary member facing the fixing member. The first limiting member and the second limiting member are used in cooperation to limit the movement of the first auxiliary member along a direction other than the first direction.

[0011] Optionally, for a possible implementation, a third limiting member is provided on a side of the first auxiliary member facing the second auxiliary member, and a fourth limiting member is provided on a side of the second auxiliary member facing the first auxiliary member. The third limiting member and the fourth limiting member are used in cooperation to limit the second auxiliary member from moving along a direction other than the second direction.

[0012] Optionally, for a possible implementation, the central axis of the lens is not parallel to the first direction and is not parallel to the second direction, and the first direction is perpendicular to the second direction.

[0013] Optionally, for a possible implementation, it further includes: a diaphragm, which is fixed on the fixing member and is correspondingly arranged with the square rod. The light beam emitted by the light source passes through the diaphragm to adjust the incident light amount, and then passes through the square rod and the lens to be transmitted to the spatial light modulator.

[0014] The solution provided by the present application includes: a light homogenizing unit, a spot adjusting unit, and a spatial light modulator, which are coaxially arranged in sequence along the light beam propagation direction. The light homogenizing unit is used to homogenize the passing light beam to form a light spot with a predetermined shape. The spot adjusting unit is used to adjust the displacement of the light beam emitted by the light homogenizing unit so that the light beam irradiates a preset position of the spatial light modulator. The spot adjusting unit includes a lens, a first auxiliary member, a second auxiliary member, a first adjusting member, and a second adjusting member. Among them, the lens is fixedly arranged on the second auxiliary member, and the second auxiliary member is movably connected to the first auxiliary member. The first adjusting member is movably connected to the first auxiliary member and is used to drive the first auxiliary member to move relative to the light homogenizing unit along the first direction, and further drive the lens fixedly arranged on the second auxiliary member to move relative to the light homogenizing unit along the first direction. The second adjusting member is movably connected to the second auxiliary member and is used to drive the second auxiliary member to move relative to the first auxiliary member along the second direction. Through the above adjustments of the first adjusting member and the second adjusting member, the spot adjusting unit can adjust the displacement of the light beam emitted by the light homogenizing unit so that the light beam irradiates the preset position of the spatial light modulator.

[0015] In the existing method for adjusting the mirror module, adjusting the mirror module will cause the light spot to rotate, increasing the difficulty of adjusting the light spot. The method of the present application for adjusting the position of the lens through the adjusting component to adjust the position of the light spot in the effective area of the spatial light modulator has a relatively high accuracy and a relatively low adjustment difficulty.

[0016] Other features and advantages of the present application will be described in the subsequent description, and part of them will become obvious from the description, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the written description, claims, and drawings. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Shows an exploded view of the optical engine system provided by an embodiment of the present application;

[0019] Figure 2 Shows a partial structural schematic diagram of the optical engine system provided by another embodiment of the present application;

[0020] Figure 3 Shows a partial structural schematic diagram of the optical engine system provided by yet another embodiment of the present application;

[0021] Figure 4 Shows a partial structural schematic diagram of the optical engine system provided by still another embodiment of the present application;

[0022] Figure 5 Shows a partial cross-sectional structural schematic diagram of the optical engine system provided by still another embodiment of the present application;

[0023] Figure 6 Shows a partial cross-sectional structural schematic diagram of the optical engine system provided by still another embodiment of the present application;

[0024] Figure 7 Shows a partial cross-sectional structural schematic diagram of the optical engine system provided by still another embodiment of the present application;

[0025] Figure 8 Shows a partial cross-sectional structural schematic diagram of the optical engine system provided by still another embodiment of the present application;

[0026] Figure 9 Shows a partial cross-sectional structural schematic diagram of the optical engine system provided by still another embodiment of the present application;

[0027] Figure 10 Shows a partial cross-sectional structural schematic diagram of the optical engine system provided by still another embodiment of the present application.

[0028] Description of the Reference Numerals:

[0029] 1. Uniform light unit; 11. Fixing part; 12. Square rod; 111. Positioning column; 112. Third limiting hole; 2. Light spot adjusting unit; 21. First auxiliary part; 22. Second auxiliary part; 23. First adjusting part; 24. Second adjusting part; 25. Lens; 3. Spatial light modulator; 4. Step screw; 5. Light source; 51. First spring; 52. Second spring; 53. Third spring; 54. First limiting part; 55. Second limiting part; 56. Third limiting part; 57. Fourth limiting part; 6. Diaphragm. Detailed implementation manners

[0030] In order to enable those skilled in the art of this technology to better understand the solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Usually, the components of the embodiments of this application described and illustrated here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is required to be protected, but only represents the selected embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0031] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] In an optical machine projection system, a spatial light modulator is a key component, which is usually composed of a series of tiny mirrors and is used to control the reflection and projection of light. The effective area on the DMD refers to the area that can be used to control light. Currently, adjusting the light spot position of the effective area on the DMD by adjusting the mirror module is difficult and costly.

[0033] Therefore, in the embodiments of this application, an optical machine system is provided to solve or partially solve the above problems.

[0034] Please refer to Figure 1, which shows a schematic structural diagram of an optical engine system provided by an embodiment of the present application. The system includes: a light homogenizing unit 1, a spot adjusting unit 2, and a spatial light modulator 3, which are coaxially arranged in sequence along the beam propagation direction. The light homogenizing unit 1 is used to homogenize the passing beam to form a spot with a predetermined shape. The spot adjusting unit 2 is used to adjust the displacement of the beam emitted by the light homogenizing unit 1 so that the beam irradiates a preset position of the spatial light modulator 3.

[0035] The spot adjusting unit 2 includes a lens 25, a first auxiliary member 21, a second auxiliary member 22, a first adjusting member 23, and a second adjusting member 24. Among them, the lens 25 is fixedly arranged on the second auxiliary member 22, and the second auxiliary member 22 is movably connected to the first auxiliary member 21.

[0036] The first adjusting member 23 is movably connected to the first auxiliary member 21 and is used to drive the first auxiliary member 21 to move relative to the light homogenizing unit 1 along a first direction, thereby driving the lens 25 fixedly arranged on the second auxiliary member 22 to move relative to the light homogenizing unit 1 along the first direction. The second adjusting member 24 is movably connected to the second auxiliary member 22 and is used to drive the second auxiliary member 22 to move relative to the first auxiliary member 21 along a second direction. Through the above adjustments of the first adjusting member 23 and the second adjusting member 24, the spot adjusting unit 2 can adjust the displacement of the beam emitted by the light homogenizing unit 1 so that the beam irradiates the preset position of the spatial light modulator 3.

[0037] The beam emitted by the light source 5 passes through the light homogenizing unit 1, passes through the lens 25, and is transmitted to the spatial light modulator 3, and a spot is formed in the effective area of the spatial light modulator 3. Due to the influence of manufacturing tolerances and fitting accuracies of parts, there is a situation of spot offset in the effective area of the spatial light modulator 3, which does not meet the actual requirements of the spot. Therefore, the position of the spot in the effective area of the spatial light modulator 3 can be adjusted by adjusting the position of the lens 25 so that the beam emitted by the light source irradiates the preset position of the spatial light modulator 3.

[0038] Further, the light homogenizing unit 1 includes a fixing member 11 and a square rod 12 fixed on the fixing member 11. The spot adjusting unit 2 is connected to the fixing member 11 through the first auxiliary member 21. The beam passes through the square rod 12, passes through the lens 25, and is transmitted to the spatial light modulator 3.

[0039] It should be noted that the optical-mechanical system includes a housing. The light homogenizing unit, the spot adjusting unit, and the spatial light modulator are all disposed inside the housing. The fixing member is fixedly connected to the inner wall of the housing, and the fixing member is connected to the first auxiliary member. The fixing member is used to support the first auxiliary member inside the housing. The supporting member is fixedly connected to the inner wall of the housing, and the supporting member is connected to the square rod. The supporting member is used to fix the square rod inside the housing. The housing and the installation of the fixing member on the inner wall of the housing are conventional designs for those skilled in the art and will not be elaborated here.

[0040] Specifically, adjusting the first adjusting member 23 causes the first auxiliary member 21 to move relative to the light homogenizing unit 1 in the first direction. Since the second auxiliary member 22 is movably connected to the first auxiliary member 21 and the lens 25 is disposed on the second auxiliary member 22, therefore, adjusting the first auxiliary member 21 to move in the first direction can achieve adjusting the lens 25 to move in the first direction.

[0041] Specifically, adjusting the second adjusting member 24 causes the second auxiliary member 22 to move relative to the first auxiliary member 21 in the second direction. Since the lens 25 is disposed on the second auxiliary member 22, therefore, adjusting the second auxiliary member 22 to move in the second direction can achieve adjusting the lens 25 to move in the second direction.

[0042] An example is provided. Please refer to Figure 1 , the first direction can be the X-axis direction, the second direction can be the Y-axis direction, and the optical path direction of the light emitted by the light source 5 to the spatial light modulator 3 can be the H direction.

[0043] It should be noted that during the adjustment process, only the first adjusting member can be adjusted, or only the second adjusting member can be adjusted, or the first adjusting member and the second adjusting member can be adjusted synchronously. The specific adjustment method depends on the actual situation. The purpose is to make the light beam irradiate on the preset position of the spatial light modulator. That is, the present application can adjust the position of the lens in two different directions so that the light beam irradiates on the preset position of the spatial light modulator.

[0044] In the existing method for adjusting the mirror module, adjusting the mirror module will cause the spot to rotate, increasing the difficulty of spot adjustment. The present application adjusts the position of the lens through the spot adjusting unit, and the accuracy of adjusting the spot position in the effective area of the spatial light modulator is relatively high, and the adjustment difficulty is relatively low.

[0045] Furthermore, please refer to Figure 1 - Figure 2 , and it further includes: a first positioning member disposed on the fixing member 11.

[0046] The first adjusting member 23 is a first screw.

[0047] The fixing member 11 has a first limiting hole, the first auxiliary member 21 has a first threaded hole corresponding to the first limiting hole, the first screw passes through the first limiting hole and is connected to the first threaded hole, the axis of the first screw is parallel to the first direction, the first positioning member is used to limit the movement of the first screw in the first direction, and when the first screw is twisted, the first auxiliary member 21 is adjusted to move along the first direction.

[0048] It should be noted that the axis of the first screw is parallel to the first direction, the first positioning member is arranged on the fixing member, and the first positioning member limits the movement of the first screw in the first direction, that is, the first screw cannot move in the first direction. The first screw passes through the first limiting hole and is connected to the first threaded hole, and the fixing member is movably connected to the first auxiliary member through the first screw. When the first screw is twisted, due to the interaction between the first screw and the first threaded hole, the first auxiliary member can move in the first direction, that is, the movement of the first auxiliary member in the first direction can be adjusted by twisting the first screw, so as to adjust the movement of the lens in the first direction, and further change the position of the light spot in the effective area of the DMD, so that the light beam irradiates to the preset position of the spatial light modulator.

[0049] Exemplarily, the pitch of the first screw is 0.25 mm, and when the screw is rotated 90 degrees, the displacement in the first direction is 0.003 mm.

[0050] Further, please refer to Figure 1 And Figure 3 , further comprising: a second positioning member arranged on the second auxiliary member 22.

[0051] The second adjusting member 24 is a second screw.

[0052] The second auxiliary member has a second limiting hole, the first auxiliary member 21 has a second threaded hole corresponding to the second limiting hole, the second screw passes through the second limiting hole and is connected to the second threaded hole, the axis of the second screw is parallel to the second direction, the second positioning member is used to limit the movement of the second screw in the second direction, and when the second screw is twisted, the second auxiliary member 22 is adjusted to move along the second direction.

[0053] It should be noted that the axis of the second screw is parallel to the second direction. The second positioning member is provided on the first auxiliary member. The second positioning member restricts the movement of the second screw in the second direction, that is, the second screw cannot move in the second direction. The second screw passes through the second limiting hole and is connected to the second threaded hole. The first limiting member is movably connected to the second auxiliary member through the second screw. When the second screw is twisted, due to the interaction between the second screw and the second threaded hole, the second auxiliary member can move in the second direction, that is, the movement of the second auxiliary member in the second direction can be adjusted by twisting the second screw, thereby adjusting the movement of the lens in the second direction, and further changing the position of the light spot in the effective area of the DMD, so that the light beam irradiates to the preset position of the spatial light modulator.

[0054] Exemplarily, the pitch of the second screw is 0.25 mm. When the screw is rotated 90 degrees, the displacement in the second direction is 0.03 mm.

[0055] In the prior art, the lens is adjusted by an externally added driving structure, which method occupies a large space and has a high adjustment cost. In this application, the position of the lens is adjusted by the first screw and the second screw, and the light spot adjustment unit is arranged on the basis of the original structure, which not only does not increase the space occupation of the optical machine system, but also has a simple adjustment structure and simple adjustment steps.

[0056] Preferably, it further includes: a second positioning member provided on the first auxiliary member; the second adjusting member is a second screw; the first auxiliary member has a second limiting hole, and the second auxiliary member has a second threaded hole corresponding to the second limiting hole. The second screw passes through the second limiting hole and is connected to the second threaded hole. The axis of the second screw is parallel to the second direction. The second positioning member is used to restrict the movement of the second screw in the second direction. When the second screw is twisted, the second auxiliary member is adjusted to move along the second direction.

[0057] Further, please refer to Figure 1 、 Figure 3 And Figure 4 , it further includes: a stepped screw 4.

[0058] The second auxiliary member 22 has at least one third limiting hole 112. The fixing member 11 has a positioning post 111 corresponding to the third limiting hole 112. A third threaded hole is provided on the end face of each positioning post 111. The stepped screw 4 passes through the third limiting hole 112 and is fixedly connected to the third threaded hole.

[0059] The stepped screw 4 clamps the lens 25 between the nut and the second auxiliary member 22 to limit the movement of the lens 25 in the third direction. The outer diameter of the step of the stepped screw 4 is smaller than the inner diameter of the third limiting hole 112. The third direction is perpendicular to the first direction and perpendicular to the second direction.

[0060] It should be noted that the stepped screw 4 passes through the third limiting hole 112 and is fixedly connected to the third threaded hole. The stepped screw 4 clamps the lens 25 between the nut and the second auxiliary member 22 to limit the movement of the lens 25 in the third direction, that is, the lens 25 cannot move in the third direction. However, since the outer diameter of the step of the stepped screw 4 is smaller than the inner diameter of the third limiting hole 112, the lens 25 can move on the plane perpendicular to the third direction. The lens 25 is disposed on the second auxiliary member 22, and the position of the lens 25 can be changed by the first adjusting member 23 and the second adjusting member 24, so that the lens 25 can move in the first direction, or the lens 25 can move in the second direction, or the lens 25 can move in both the first direction and the second direction at the same time.

[0061] An example is given. Please refer to Figure 1 - Figure 4 , the first direction can be the X-axis direction, the second direction can be the Y-axis direction, the third direction can be the Z-axis direction, and the optical path direction of the light emitted by the light source to the spatial light modulator can be the H direction.

[0062] Furthermore, the central axis of the lens is not parallel to the first direction and not parallel to the second direction, and the first direction is perpendicular to the second direction. That is to say, the lens can be adjusted to move on the adjustment plane, and the adjustment plane is parallel to the first direction and parallel to the second direction.

[0063] The displacement of the lens moving in the first direction is determined by the inner diameter of the third limiting hole and the outer diameter of the step of the stepped screw.

[0064] An example is given. The outer diameter of the step of the stepped screw is 2.5 mm, and the inner diameter of the third limiting hole is 5.6 mm. Therefore, the movable range of the lens in the first direction is 3.1 mm, and the unilateral movable range is 1.55 mm. Similarly, the movable range of the lens in the second direction is 3.1 mm, and the unilateral movable range is 1.55 mm.

[0065] Exemplarily, please refer to Figure 5 - Figure 10 , which is a partial sectional structure diagram of the optical-mechanical system. Among them, Figure 6 and Figure 7 show the limit positions of the first auxiliary member 21 moving in the first direction, Figure 9 and Figure 10 show the limit positions of the second auxiliary member 22 moving in the second direction.

[0066] Further, please refer to Figure 1 - Figure 4 A first spring 51 is sleeved on the first screw, and the first spring 51 is clamped between the nut of the first screw and the fixing member 11.

[0067] A second spring 52 is sleeved on the second screw, and the second spring 52 is clamped between the nut of the second screw and the second auxiliary member 22.

[0068] A third spring 53 is sleeved on the stepped screw 4, and the third spring 53 is clamped between the nut of the stepped screw 4 and the second auxiliary member 22.

[0069] It should be noted that during the use of the optical engine system, thermal expansion and contraction and vibration may cause the threaded connection to become loose. When the threaded connection becomes loose, the positions of the first auxiliary member and the second auxiliary member will change, thereby changing the position of the lens, causing the light spot in the effective area of the DMD to move and reducing the projection effect.

[0070] Therefore, in this application, the first spring is clamped between the nut of the first screw and the fixing member, the second spring is clamped between the nut of the second screw and the second auxiliary member, and the third spring is clamped between the nut of the stepped screw and the second auxiliary member. On the one hand, the spring can absorb a part of the vibration amount, reducing the influence of vibration on the threaded connection. On the other hand, the spring can absorb part of the deformation caused by the temperature difference, maintaining a relatively stable tightening force of the threaded connection and avoiding loosening of the thread.

[0071] Further, please refer to Figure 2 and Figure 8 A first limiting member 54 is provided on the side of the fixing member 11 facing the first auxiliary member 21, and a second limiting member 55 is provided on the side of the first auxiliary member 21 facing the fixing member 11. The first limiting member 54 and the second limiting member 55 are used in cooperation to limit the first auxiliary member 21 from moving in a direction other than the first direction.

[0072] It should be noted that the light spot adjustment unit itself has a certain weight, and the center of gravity of the light spot adjustment unit is not necessarily in the first direction. When adjusting the first auxiliary member, the first auxiliary member may rotate around the first screw or move in other directions.

[0073] Therefore, by using the first limiting member and the second limiting member in cooperation, the movement of the first auxiliary member in a direction other than the first direction can be restricted, that is, the first auxiliary member can only move in the first direction.

[0074] Further, please refer to Figure 2 and Figure 6, on one side of the first auxiliary member 21 facing the second auxiliary member 22, a third limiting member 56 is provided, and on one side of the second auxiliary member 22 facing the first auxiliary member 21, a fourth limiting member 57 is provided. The third limiting member 56 and the fourth limiting member 57 are used in cooperation to limit the second auxiliary member 22 from moving along a direction other than the second direction.

[0075] It should be noted that the spot adjustment unit itself has a certain weight, and the center of gravity of the spot adjustment unit is not necessarily in the second direction. When adjusting the second auxiliary member, the second auxiliary member may rotate around the second screw or move in other directions.

[0076] Therefore, the third limiting member and the fourth limiting member can be used in cooperation to limit the second auxiliary member from moving along a direction other than the second direction, that is, the second auxiliary member can be made to move only in the second direction.

[0077] Further, please refer to Figure 1 , further comprising: a diaphragm 6, the diaphragm 6 is fixed on the fixing member 11, and is arranged corresponding to the square rod 12. The light beam emitted by the light source 5 passes through the diaphragm 6 to adjust the light input amount, and then passes through the square rod 12 and passes through the lens 25 to be transmitted to the spatial light modulator 3.

[0078] Further, a light source 5 is further included. The light source 5 is arranged inside the housing and is arranged opposite to the diaphragm 6. The housing is used to encapsulate the diaphragm 6, the light homogenizing unit 1, the spot adjustment unit 2, and the spatial light modulator 3. The light beam emitted by the light source 5 passes through the diaphragm 6 to adjust the light input amount, and then passes through the square rod 12 and passes through the lens 25 to be transmitted to the spatial light modulator 3.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical-mechanical system, characterized in that: include: A light homogenization unit, a light spot adjustment unit and a spatial light modulator are coaxially arranged in sequence along the propagation direction of the light beam, wherein the light homogenization unit is used to homogenize the light beam passing through to form a light spot of a predetermined shape, and the light spot adjustment unit is used to adjust the displacement of the light beam emitted by the light homogenization unit so that the light beam is irradiated to a preset position of the spatial light modulator; The light spot adjustment unit comprises a lens, a first auxiliary member, a second auxiliary member, a first adjustment member and a second adjustment member, wherein the lens is fixed to the second auxiliary member, and the second auxiliary member is movably connected to the first auxiliary member; The first adjusting member is movably connected to the first auxiliary member, and is used to drive the first auxiliary member to move relative to the light homogenizing unit along a first direction, thereby driving the lens fixed on the second auxiliary member to move relative to the light homogenizing unit along the first direction. The second adjusting member is movably connected to the second auxiliary member, and is used to drive the second auxiliary member to move relative to the first auxiliary member along a second direction. Through the above-mentioned adjustment of the first adjusting member and the second adjusting member, the light spot adjustment unit can achieve the effect of displacement adjustment of the light beam emitted by the light homogenizing unit, so that the light beam is irradiated to a preset position of the spatial light modulator.

2. The optical-mechanical system according to claim 1, characterized in that: The light homogenizing unit includes a fixing part and a square rod fixed on the fixing part, the light spot adjustment unit is connected to the fixing part through the first auxiliary part, and the light beam passes through the square rod and the lens and is transmitted to the spatial light modulator.

3. The optical-mechanical system according to claim 2, characterized in that: Also includes: A first positioning member, disposed on the fixing member; The first adjusting member is a first screw; The fixing member has a first limiting hole, the first auxiliary member has a first threaded hole corresponding to the first limiting hole, the first screw passes through the first limiting hole and is connected to the first threaded hole, the axis of the first screw is parallel to the first direction, and the first positioning member is used to limit the movement of the first screw in the first direction. When the first screw is twisted, the first auxiliary member is adjusted to move along the first direction.

4. The optical-mechanical system according to claim 3, characterized in that: Also includes: A second positioning member, provided on the second auxiliary member; The second adjusting member is a second screw; The second auxiliary has a second limiting hole, the first auxiliary has a second threaded hole corresponding to the second limiting hole, the second screw passes through the second limiting hole and is connected to the second threaded hole, the axis of the second screw is parallel to the second direction, and the second positioning member is used to limit the movement of the second screw in the second direction. When the second screw is twisted, the second auxiliary is adjusted to move along the second direction.

5. The optical-mechanical system according to claim 4, characterized in that: Also includes: Step screws; The second auxiliary member has at least one third limiting hole, the fixing member has a positioning column corresponding to the third limiting hole, the end surface of each positioning column is provided with a third threaded hole, and the step screw passes through the third limiting hole and is fixedly connected to the third threaded hole; The step screw clamps the lens between the nut and the second auxiliary component to limit the movement of the lens in a third direction. The outer diameter of the step of the step screw is smaller than the inner diameter of the third limiting hole. The third direction is perpendicular to the first direction and perpendicular to the second direction.

6. The optical-mechanical system according to claim 5, characterized in that: The first screw sleeve is provided with a first spring, and the first spring is clamped between the nut of the first screw and the fixing member; The second screw sleeve is provided with a second spring, and the second spring is clamped between the nut of the second screw and the second auxiliary member; The step screw sleeve is provided with a third spring, and the third spring is clamped between the nut of the step screw and the second auxiliary component.

7. The optical-mechanical system according to claim 2, wherein: A first limiting member is provided on the side of the fixing member facing the first auxiliary member, and a second limiting member is provided on the side of the first auxiliary member facing the fixing member. The first limiting member and the second limiting member are used together to limit the first auxiliary member from moving in a direction other than the first direction.

8. The optical-mechanical system according to claim 2, wherein: A third limiter is provided on the side of the first auxiliary member facing the second auxiliary member, and a fourth limiter is provided on the side of the second auxiliary member facing the first auxiliary member. The third limiter is used in conjunction with the fourth limiter to limit the second auxiliary member from moving in a direction other than the second direction.

9. The optical-mechanical system according to claim 2, wherein: The central axis of the lens is not parallel to the first direction and is not parallel to the second direction, and the first direction is perpendicular to the second direction.

10. The optical-mechanical system according to claim 9, characterized in that: Also includes: The diaphragm is fixed on the fixing member and is arranged corresponding to the square rod. The light beam emitted by the light source passes through the diaphragm to adjust the amount of incident light, and then passes through the square rod and the lens to be transmitted to the spatial light modulator.

Images