Diaphragm adjusting device

Abstract

The utility model belongs to the technical field of optics, and particularly provides a diaphragm adjusting device which comprises a base and a diaphragm. The base is connected with a bracket; the bracket is provided with a mounting through hole; the diaphragm is movably mounted in the mounting through hole; the support is provided with an adjusting assembly used for driving the diaphragm to move in the installation through hole, and the moving direction of the diaphragm in the installation through hole is parallel to the vertical plane of light beam propagation. According to the diaphragm adjusting device provided by the utility model, complicated X-axis and Y-axis adjusting mechanisms are omitted, and the diaphragm adjusting device is small in size, low in cost and convenient to use. The position of the diaphragm can be determined only through the adjusting screw and the elastic plunger, the diaphragm slides along the matching surface of the diaphragm base when the adjusting screw is adjusted, and high-precision adjustment of the diaphragm is achieved. In addition, the light passing area of the diaphragm can be polished and chamfered, the damage threshold value of the diaphragm is increased, the aperture can be made smaller, and the volume of a fundamental mode is limited.

Description

Technical Field

[0001] The utility model belongs to the technical field of optics, and in particular relates to an aperture adjustment device. Background Art

[0002] Ultraviolet lasers end-pumped by semiconductor lasers have the characteristics of good beam quality and high peak energy, and are widely used in marking, PCB cutting and other fields. In order to improve the light-to-light conversion efficiency, enhance the spot quality, and suppress the generation of multi-modes, it is usually necessary to add a mode-limiting aperture in the cavity. In order to improve the mode-limiting effect, it is usually required that the aperture of the aperture be as close to the base mode size as possible. However, due to the accumulation of processing errors and device errors, the position of the base mode is usually difficult to determine, and the position of the aperture needs to be adjusted to match the position of the base mode. Traditional aperture adjustment devices generally use an XY-axis adjustment mechanism assembled from two separate axes, which has a complex structure, large size, and high cost. Utility Model Content

[0003] The utility model aims to provide a device which has small volume, low cost, convenient operation and can adjust the aperture through hole to match the base mold position.

[0004] To this end, the utility model provides an aperture adjustment device, including a base and an aperture; the base is connected to a bracket; the bracket is provided with a mounting hole; the aperture is movably installed in the mounting hole; the bracket is provided with an adjustment component for driving the aperture to move in the mounting hole, and the moving direction of the aperture in the mounting hole is parallel to the vertical plane of the light beam propagation.

[0005] Specifically, the light incident side of the aperture of the aperture is chamfered.

[0006] Specifically, the inner wall of the aperture hole of the aperture is provided with a gold-plated layer.

[0007] Specifically, the above-mentioned aperture includes a mounting seat and an aperture sheet with an aperture hole; the mounting seat is arranged on one side of the aperture sheet; the mounting seat is movably installed in the mounting through hole; the mounting seat is provided with a light-through hole; and the light-through hole is connected to the aperture hole.

[0008] Specifically, the bracket is provided with a fixing piece for detachably fixing the diaphragm on the bracket.

[0009] Specifically, the above-mentioned fixing part includes a locking screw; the bracket is provided with a threaded hole matching the locking screw; the aperture piece is provided with a corresponding mounting hole; the aperture piece is detachably fixed to the bracket through the locking screw, the threaded hole and the mounting hole.

[0010] Specifically, the adjustment assembly includes a plurality of adjustment screws; the bracket is provided with threaded holes corresponding to the adjustment screws one by one; one end of the adjustment screw passes through the threaded hole and extends into the mounting through hole to contact the aperture.

[0011] Specifically, the contact points between the plurality of adjusting screws and the aperture are located in the same plane, and the plane is parallel to the vertical plane of the light beam propagation.

[0012] Specifically, the adjustment assembly further includes an elastic member; one end of the elastic member extends into the mounting through hole and contacts the diaphragm.

[0013] Specifically, the elastic member comprises a spring plunger; the bracket is provided with a threaded hole matching the spring plunger; one end of the top ball of the spring plunger passes through the threaded hole and contacts the diaphragm.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] The aperture adjustment device provided by the utility model eliminates the complicated X and Y axis adjustment mechanism, is compact, low cost and easy to use. The position of the aperture can be determined only by adjusting the screw and the elastic plunger. When the adjusting screw is adjusted, the aperture will slide along the matching surface of the aperture base, thereby realizing high-precision adjustment of the aperture. In addition, the aperture light passing area is polished and chamfered separately, which improves the damage threshold of the aperture, so that the aperture can be made smaller and the base model volume can be limited.

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the aperture adjustment device provided by the utility model.

[0018] Figure 2 It is a cross-sectional view of the aperture adjustment device provided by the utility model.

[0019] Figure 3 yes Figure 2 Middle FF section view.

[0020] Figure 4 The utility model is a schematic diagram of the diaphragm structure in the diaphragm adjustment device.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. bracket; 201. mounting through hole; 3. aperture plate; 301. aperture hole; 302. chamfer; 4. mounting seat; 401. light-through hole; 402. limiting inclined plane; 5. adjusting screw; 6. spring plunger; 7. locking screw. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0025] Reference Figure 1-3 The utility model provides an aperture adjustment device, comprising a base 1 and an aperture; the base 1 is connected with a bracket 2; the bracket 2 is provided with a mounting through hole 201; the aperture is movably installed in the mounting through hole 201; the bracket 2 is provided with an adjustment component for driving the aperture to move in the mounting through hole 201, and the moving direction of the aperture in the mounting through hole 201 is parallel to the vertical plane of light beam propagation. When in use, the aperture is installed in the mounting through hole 201, and the axis of the aperture hole 301 is preferably parallel to the axis of the mounting through hole 201. The aperture adjustment device is placed in the resonant cavity, and the shape and power of the light output from the resonant cavity are observed to determine whether the aperture position is appropriate. If adjustment is required, the adjustment component is started to drive the aperture to move in the mounting through hole 201, and fine-tune it to a suitable position, and the moving direction is parallel to the vertical plane of light beam propagation to avoid affecting the light path, so as to realize the two-dimensional adjustment of the aperture on the vertical plane of light beam propagation. The vertical plane of light beam propagation refers to a plane perpendicular to the light beam incident into the aperture.

[0026] In order to increase the mapping area of ​​the stray light, the aperture 301 of the aperture is provided with a chamfer 302 facing the light surface, so that the aperture of the aperture 301 can be made smaller and the fundamental mode volume can be limited.

[0027] Furthermore, the inner wall of the aperture hole 301 of the aperture is polished and provided with a gold-plated layer to improve the damage threshold of the aperture.

[0028] In a detailed implementation, Figure 4 As shown, the diaphragm includes a mounting seat 4 and an diaphragm sheet 3 with an diaphragm hole 301; the mounting seat 4 is arranged on one side of the diaphragm sheet 3; the mounting seat 4 is movably mounted in the mounting through hole 201; the mounting seat 4 is provided with a light-through hole 401; the light-through hole 401 is connected with the diaphragm hole 301. When in use, the mounting seat 4 is plugged into the mounting through hole 201, and the space in the mounting through hole 201 is larger than the volume of the mounting seat 4, providing space for the diaphragm to move in the mounting hole. The diaphragm sheet 3 is located outside the mounting through hole 201, so that the diaphragm can be fixed to the support after being adjusted into place, so that the diaphragm can be stabilized in a suitable position. Optionally, the inner walls of the light-through hole 401 of the mounting seat 4 and the diaphragm hole 301 of the diaphragm are polished and provided with a gold-plated layer.

[0029] Furthermore, the bracket 2 is provided with a fixing piece for detachably fixing the aperture piece 3 to the bracket 2. When in use, the mounting seat 4 is placed in the mounting through hole 201, the aperture piece 3 is first fixed to the bracket 2 by the fixing piece, and then the aperture adjustment device is placed in the resonance cavity. If adjustment is required, the fixing piece is released, the adjustment component is started, and the relative position of the mounting seat 4 in the mounting through hole 201 is fine-tuned. After the aperture is adjusted to a suitable position, the aperture piece 3 is fixed to the bracket 2 by the fixing piece to ensure the stability of the aperture adjustment device.

[0030] Optionally, the fixing member includes a locking screw 7; the bracket 2 is provided with a threaded hole matching the locking screw 7; the aperture piece 3 is provided with a corresponding mounting hole; the aperture piece 3 is detachably fixed to the bracket 2 through the locking screw 7, the threaded hole and the mounting hole. The connection between the aperture piece 3 and the bracket 2 is released or fixed by turning the locking screw 7. The cross-sectional area of ​​the mounting hole is larger than the cross-sectional area of ​​the threaded hole, ensuring that after the aperture position is fine-tuned, the locking screw 7 can still pass through the mounting hole and be inserted into the threaded hole to lock the aperture piece 3 and the bracket 2.

[0031] In an optimized implementation, the adjustment assembly includes a plurality of adjustment screws 5, preferably fine-thread adjustment screws 5; the bracket 2 is provided with threaded holes corresponding to the adjustment screws 5; one end of the adjustment screw 5 passes through the threaded holes and extends into the mounting through hole 201 to contact the diaphragm. When in use, the adjustment screw 5 is turned to apply force to the diaphragm from multiple angles, so that the diaphragm moves relatively in the mounting through hole 201. The installation positions, installation angles and quantities of the plurality of adjustment screws 5 can be designed according to actual conditions.

[0032] Specifically, the contact points between the multiple adjustment screws 5 and the aperture, that is, the points where the adjustment screws 5 apply force to the aperture, are located in the same plane, and the plane is parallel to the vertical plane of the light beam propagation, so that the aperture is subjected to uniform force and does not shift during the adjustment process, thereby realizing two-dimensional adjustment of the aperture on the vertical plane of the light beam propagation.

[0033] Preferably, Figure 4 As described above, the contact end between the aperture and the adjusting screw 5 is provided with a limiting inclined surface 402 to limit the force direction of the adjusting screw 5 and prevent the aperture from moving along the optical axis direction and the light beam propagation direction.

[0034] Furthermore, the adjustment assembly further includes an elastic member; one end of the elastic member extends into the mounting through hole 201 and contacts the diaphragm. The elastic member provides appropriate pressure for the diaphragm, which facilitates the subsequent adjustment of the diaphragm position by the adjustment screw 5. The force application point of the elastic member on the diaphragm is preferably located in the same plane as the force application point of the adjustment screw 5 on the diaphragm, and the plane is parallel to the vertical plane of the light beam propagation.

[0035] Optionally, the elastic member includes a spring plunger 6; the bracket 2 is provided with a threaded hole matching the spring plunger 6; one end of the top ball of the spring plunger 6 passes through the threaded hole and contacts the diaphragm. The elastic coefficient and the plunger travel of the spring plunger 6 are selected in combination with actual conditions.

[0036] Embodiment 1:

[0037] Reference Figure 1-4 The utility model provides an aperture adjustment device, comprising a base 1 and an aperture.

[0038] A bracket 2 is connected to the base 1; the bracket 2 is a plate-like structure, and is provided with a penetrating mounting hole 201; the bracket 2 is also provided with a plunger threaded hole and two adjustment threaded holes connected to the mounting hole 201; the plunger threaded hole is arranged at the bottom of the bracket 2, and the two adjustment threaded holes are symmetrically arranged on both sides of the plunger threaded hole; a spring plunger 6 is installed in the plunger threaded hole, and an adjustment screw 5 is installed in each adjustment threaded hole; two locking threaded holes are provided on the side wall of the bracket 2 facing the aperture; the two locking threaded holes are symmetrically arranged on both sides of the mounting hole 201; and locking screws 7 are installed in the locking threaded holes.

[0039] The aperture includes a mounting seat 4 and an aperture piece 3 with an aperture hole 301; the mounting seat 4 is arranged on one side of the aperture piece 3; the mounting seat 4 is a cylindrical structure, and the diameter is smaller than the diameter of the mounting through hole 201; the mounting seat 4 is provided with a light-through hole 401; the light-through hole 401 is connected with the aperture hole 301, and the axis of the mounting seat 4, the axis of the light-through hole 401, and the axis of the aperture hole 301 coincide; the aperture hole 301 is provided with a chamfer 302 facing the light surface; the inner walls of the light-through hole 401 and the aperture hole 301 are polished and provided with a gold-plated layer; the aperture piece 3 is provided with two mounting holes, which correspond one to one with the locking threaded holes on the bracket 2.

[0040] The mounting seat 4 is inserted into the mounting through hole 201; the outer wall of the mounting seat 4 is provided with a limiting inclined surface 402; the ends of the two adjusting screws 5 and the top ball of the spring plunger 6 are respectively in contact with the inclined surfaces of the outer wall of the mounting seat 4, and the three contact points are located in the same plane, and the plane is parallel to the vertical plane of the light beam propagation.

[0041] When in use, first insert the mounting seat 4 into the mounting through hole 201, insert one end of the locking screw 7 through the mounting hole on the aperture piece 3 into the corresponding locking screw hole, and fix the aperture piece 3 on the bracket 2. Screw the spring plunger 6 into the plunger threaded hole, and the screwing depth is based on providing appropriate pressure to the aperture. Then screw the two adjusting screws 5 into the adjusting threaded holes, and the screwing depth is based on the end of the adjusting screw 5 touching the mounting seat 4. Install the assembled aperture adjustment device into the resonant cavity, observe the shape and power of the output light of the resonant cavity, and if the aperture position needs to be adjusted, loosen the two locking screws 7. At this time, the aperture remains stationary under the action of the elastic plunger, the two adjusting screws 5 and the aperture bevel. Rotate the two adjusting screws 5 to adjust the force applied to the mounting seat 4. Under the limiting action of the limiting inclined surface 402, the aperture will be displaced in the mounting through hole 201, and the displacement range is controlled within a plane parallel to the vertical plane of the beam propagation, so as to realize the two-dimensional adjustment of the aperture on the vertical plane of the beam propagation. After debugging is completed, tighten the two locking screws 7 to ensure the stability of the aperture structure.

[0042] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. An aperture adjustment device, characterized in that: The invention comprises a base (1) and an aperture; the base (1) is connected to a bracket (2); the bracket (2) is provided with a mounting through hole (201); the aperture is movably mounted in the mounting through hole (201); the bracket (2) is provided with an adjustment component for driving the aperture to move in the mounting through hole (201), and the moving direction of the aperture in the mounting through hole (201) is parallel to the vertical plane of light beam propagation.

2. The aperture adjustment device according to claim 1, characterized in that: The light incident side of the aperture hole (301) of the aperture is provided with a chamfer (302).

3. The aperture adjustment device according to claim 1, characterized in that: The inner wall of the aperture hole (301) of the aperture is provided with a gold-plated layer.

4. The aperture adjustment device according to claim 1, characterized in that: The aperture comprises a mounting seat (4) and an aperture piece (3) with an aperture hole (301); the mounting seat (4) is arranged on one side of the aperture piece (3); the mounting seat (4) is movably mounted in the mounting through hole (201); the mounting seat (4) is provided with a light through hole (401); the light through hole (401) is connected to the aperture hole (301).

5. The aperture adjustment device according to claim 4, characterized in that: The bracket (2) is provided with a fixing piece for detachably fixing the aperture piece (3) on the bracket (2).

6. The aperture adjustment device according to claim 5, characterized in that: The fixing member comprises a locking screw (7); the bracket (2) is provided with a threaded hole matching the locking screw (7); the aperture piece (3) is provided with a corresponding mounting hole; the aperture piece (3) is detachably fixed to the bracket (2) via the locking screw (7), the threaded hole and the mounting hole.

7. The aperture adjustment device according to claim 1, characterized in that: The adjustment assembly comprises a plurality of adjustment screws (5); the bracket (2) is provided with threaded holes corresponding one to one with the adjustment screws (5); one end of the adjustment screw (5) passes through the threaded holes and extends into the mounting through hole (201) to contact the aperture.

8. The aperture adjustment device according to claim 7, characterized in that: The contact points of the plurality of adjusting screws (5) and the aperture are located in the same plane, and the plane is parallel to the vertical plane of light beam propagation.

9. The aperture adjustment device according to claim 8, characterized in that: The adjustment assembly also includes an elastic member; one end of the elastic member extends into the mounting through hole (201) to contact the diaphragm.

10. The aperture adjustment device according to claim 9, characterized in that: The elastic member comprises a spring plunger (6); the bracket (2) is provided with a threaded hole matching the spring plunger (6); one end of the top ball of the spring plunger (6) passes through the threaded hole and contacts the diaphragm.

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