A transmissive grating adjustment device

Abstract

The present invention relates to a transmissive grating adjusting device. The solution includes a yaw adjusting base with a pin hole at the bottom, a pitch adjusting fixing frame fixedly connected to the top of the yaw adjusting base through a connecting member, and a pitch adjusting plate rotatably connected to the pitch adjusting fixing frame; an auxiliary adjusting plate is provided on the pitch adjusting fixing frame, and a tension screw and a first ball head pressing screw for cooperating with the pitch adjusting plate to adjust the rotation angle of the pitch adjusting plate are provided on the auxiliary adjusting plate; a grating mounting plate rotatably connected to the pitch adjusting plate is provided on the pitch adjusting plate, a grating is mounted on the grating mounting plate, and two second ball head pressing screws are provided on the pitch adjusting plate. The tilting rotation angle of the grating mounting plate is adjusted by the two ball head pressing screws. The present invention can realize the rotation, pitch and yaw adjustment of the transmissive grating. The three-dimensional angle adjustments are independent of each other and do not interfere with each other. Fine adjustment of rotation and pitch can be achieved. The overall structure is simple, the adjustment is convenient, and the stability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of lasers, and particularly relates to a transmissive grating adjustment device. Background Art

[0002] In the process of generating ultrashort pulsed lasers in ultrafast lasers, a pair of parallel gratings are required to compress laser pulses. The angular change of the gratings will affect the waveform quality and compression efficiency of the output optical pulses. To obtain the best pulse waveform quality and compression efficiency, the three-dimensional angles of the gratings need to be adjusted, which requires the fixing device of the gratings to have a three-dimensional angle adjustment function.

[0003] Currently, the commonly used angle adjustment bracket tightens the fixed plate and the adjustment plate with a tension spring or compresses them with a disc spring, and adjusts the angle of the adjustment plate with a screw rod. After adjustment, the screw rod is locked. The adjustment is relatively convenient. However, since it uses the force of the spring to maintain the structural stability, the adjustment plate can still move under vibration or external force, and the structural stability is poor, which will affect the stability of the laser pulse waveform.

[0004] Chinese Patent CN201410633421.8 discloses a highly stable grating adjustment bracket, which includes a substrate, an adjustment plate, a semi-circular plate, a grating plate, and a locking pressure plate. A plurality of springs are installed between the substrate and the adjustment plate. The semi-circular plate is installed in a groove. The grating plate is vertically installed on the semi-circular plate. One side wall of the locking pressure plate is placed above the semi-circular plate, and the other side wall is placed above the adjustment plate, and is fastened to the semi-circular plate and the adjustment plate respectively through two stud bolts. The structure of the present invention is simple and the operation is convenient, which can make the laser operate more stably and ensure the reliability of long-term operation. However, it mainly contacts through points and points, especially in the pitch adjustment, with three points in contact, and its stability is poor. Summary of the Invention

[0005] The purpose of the present invention is to provide a transmissive grating adjustment device that can not only achieve three-dimensional angle adjustment but also achieve reliable locking in view of the above problems existing in the prior art.

[0006] To achieve the above invention purpose, the present invention adopts the following technical solutions: A transmissive grating adjustment device includes a yaw adjustment base with a pin hole at the bottom, a pitch adjustment fixing frame fixed to the top of the yaw adjustment base through a connecting member, and a pitch adjustment plate rotatably connected to the pitch adjustment fixing frame; an auxiliary adjustment plate is provided on the pitch adjustment fixing frame, and a tension screw and a first ball head pressing screw for cooperating with the pitch adjustment plate to adjust the rotation angle of the pitch adjustment plate are provided on the auxiliary adjustment plate; a grating mounting plate rotatably connected to the pitch adjustment plate is provided on the pitch adjustment plate, a grating is installed on the grating mounting plate, and two second ball head pressing screws are provided on the pitch adjustment plate, and the tilting rotation angle of the grating mounting plate is adjusted through the two ball head pressing screws.

[0007] Working principle and beneficial effects: During use, since the grating is fixedly installed on the grating mounting plate, the top left and right ends of the grating mounting plate are respectively squeezed by two second spherical head tightening screws, one high and one low, causing the grating mounting plate to tilt left and right, thereby realizing the adjustment of the tilt angle of the grating mounting plate. After adjustment, the grating mounting plate is fixed to the pitch adjustment plate through screws. By tightening the screws and the first spherical head tightening screws to squeeze or pull the pitch adjustment plate, the pitch adjustment plate can rotate and move at an angle on the pitch adjustment fixing frame, thereby realizing the pitch adjustment of the pitch adjustment plate. Finally, by installing a pin shaft in the pin hole of the yaw adjustment base, the adjustment of the rotation angle of the yaw adjustment base can be realized. The above settings can realize the rotation, pitch, and yaw adjustments of the grating. The three-dimensional angle adjustments are independent of each other and do not interfere with each other. Moreover, fine adjustments of rotation and pitch can be achieved. The grating, grating mounting plate, pitch adjustment plate, pitch adjustment fixing frame, and yaw adjustment base are all in surface-to-surface contact with each other and can be fixed with connecting parts such as screws, which can achieve the advantages of reliable locking, simple overall structure, and convenient adjustment. At the same time, the existing elastic fixing structure is not adopted, and the stability is good.

[0008] Further, the yaw adjustment base is provided with waist-shaped holes, and the waist-shaped holes are evenly arranged around the pin hole as the center. The waist-shaped holes in this setting can fix the yaw adjustment base to other devices through common threaded fasteners. Moreover, the position setting of the waist-shaped holes can realize fine adjustment of the rotation angle around the pin hole in the state where the screw is locked but not tightened, and the operation is convenient.

[0009] Further, the pitch adjustment fixing frame is provided with a pitch adjustment rotating shaft that cooperates with the pitch adjustment plate, and the pitch adjustment rotating shaft is horizontally arranged along the length direction of the pitch adjustment fixing frame. The above setting enables the pitch adjustment plate to rotate around the pitch adjustment rotating shaft, that is, to realize the pitch adjustment of the grating, and the structure is simple.

[0010] Further, the pitch adjustment fixing frame is provided with an auxiliary tightening screw coaxial with the pitch adjustment rotating shaft. The end of the auxiliary tightening screw in contact with the pitch adjustment plate is provided with a spherical head, and the pitch adjustment plate is provided with a groove that cooperates with the spherical head. This setting can play an auxiliary supporting role for the pitch adjustment plate. Especially when the length of the pitch adjustment plate is relatively long, the auxiliary tightening screw can support and tighten the pitch adjustment plate without affecting the rotation of the pitch adjustment plate, making the pitch adjustment plate more stable.

[0011] Further, the pitch adjustment fixing frame is provided with a locking screw assembly for restricting the rotational freedom of the pitch adjustment plate. After the pitch adjustment plate is finely adjusted in angle, the pitch adjustment plate is locked to the pitch adjustment fixing frame through the locking screw assembly. The operation is convenient and the structure is simple. The locking screw assembly is composed of common screws, spring washers, and flat washers.

[0012] Furthermore, the grating is fixedly bonded to the grating mounting plate. This setting can effectively reduce the deformation of the grating caused by external forces during installation.

[0013] Furthermore, a detachable grating auxiliary mounting plate is provided on the grating mounting plate, and the grating auxiliary mounting plate is located at the bottom of the grating. With this setting, the bottom of the grating is abutted by the grating auxiliary mounting plate, which can play an auxiliary supporting role during the installation of the grating, and after the grating is installed, the grating auxiliary mounting plate can continuously support the grating.

[0014] Furthermore, a rotating adjustment shaft is provided between the pitching adjustment plate and the grating mounting plate, and the rotating adjustment shaft is horizontally arranged along the width direction of the pitching adjustment fixing frame. With this setting, it is convenient for the grating mounting plate to rotate around the rotating adjustment shaft, thereby realizing the adjustment of the left and right tilting angles of the grating, and the structure is simple.

[0015] Furthermore, the pitching adjustment plate and the grating mounting plate are fixed through a connecting member. The adjusted grating mounting plate and the pitching adjustment plate are fixed by common threaded fasteners, with good fixing effect and convenient disassembly and assembly.

[0016] Furthermore, the tensioning screw passes through the auxiliary adjustment plate and is connected to the pitching adjustment plate, and the first ball head tightening screw passes through the auxiliary adjustment plate and abuts against the side wall of the pitching adjustment plate. With this setting, when it is necessary to push the pitching adjustment plate to rotate inward, only need to loosen the tensioning screw first and continuously lock the first ball head tightening screw inward. When it is necessary to pull the pitching adjustment plate outward, only need to loosen the first ball head tightening screw outward and then continue to screw the tensioning screw inward, so that the tensioning screw will pull the pitching adjustment plate to rotate outward by a certain angle, thereby realizing the fine adjustment of the angle of the pitching adjustment plate, and the operation is convenient. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the present invention;

[0018] Figure 2 is Figure 1 another perspective schematic view of

[0019] Figure 3 is the front view of the present invention;

[0020] Figure 4 is the top view of the present invention;

[0021] Figure 5 is Figure 3 the cross-sectional view taken along A-A in

[0022] In the figure, 1 is a grating; 2 is a grating mounting plate; 3 is an auxiliary mounting plate; 4 is a pitch adjustment fixing bracket; 5 is a pitch adjustment plate; 6 is a yaw adjustment base; 7 is an auxiliary adjustment plate; 8 is an auxiliary tightening screw; 9 is a second spherical head tightening screw; 11 is a pitch adjustment rotating shaft; 12 is a locking screw assembly; 14 is a tensioning screw; 15 is a first spherical head tightening screw; 16 is a rotation adjustment rotating shaft; 101 is a pin hole; 801 is a spherical head part. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0024] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is 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. Therefore, the above terms should not be construed as limiting the present invention.

[0025] As Figures 1-5 shown, this transmissive grating adjustment device includes a yaw adjustment base 6 provided with a pin hole 101 at the bottom, a pitch adjustment fixing bracket 4 fixed to the top of the yaw adjustment base 6 through a connecting member, and a pitch adjustment plate 5 rotatably connected to the pitch adjustment fixing bracket 4, wherein the connecting member is a common threaded fastener, such as a screw, etc.

[0026] In this embodiment, the pitch adjustment fixing bracket 4 is provided with an opening for installing the pitch adjustment plate 5, and the left and right ends of the pitch adjustment plate 5 are in contact with the inner wall of the opening.

[0027] Specifically, an auxiliary adjustment plate 7 is provided on the pitch adjustment fixing bracket 4, and a tensioning screw 14 and a first spherical head tightening screw 15 for cooperating with the pitch adjustment plate 5 to adjust the rotation angle of the pitch adjustment plate 5 are provided on the auxiliary adjustment plate 7;

[0028] Specifically, a grating mounting plate 2 rotatably connected to the pitch adjustment plate 5 is provided on the pitch adjustment plate 5, a grating 1 is installed on the grating mounting plate 2, and two second spherical head tightening screws 9 are provided on the pitch adjustment plate 5, and the tilting rotation angle of the grating mounting plate 2 is adjusted through the second spherical head tightening screws 9.

[0029] Specifically, the yaw adjustment base 6 is provided with waist-shaped holes which are uniformly arranged around the pin hole 101. The waist-shaped holes in this setting can fix the yaw adjustment base 6 on other devices through common threaded fasteners, and the position setting of the waist-shaped holes can achieve fine adjustment of the rotation angle around the pin hole 101 in the state where the screw is inserted but not tightened, which is convenient for operation.

[0030] Specifically, the pitch adjustment fixing frame 4 is provided with a pitch adjustment rotating shaft 11 that cooperates with the pitch adjustment plate 5, and the pitch adjustment rotating shaft 11 is horizontally arranged along the length direction of the pitch adjustment fixing frame 4. The above setting enables the pitch adjustment plate 5 to rotate around the pitch adjustment rotating shaft 11, that is, to achieve the pitch adjustment of the grating 1, and the structure is simple.

[0031] Specifically, the pitch adjustment fixing frame 4 is provided with an auxiliary tightening screw 8 coaxial with the pitch adjustment rotating shaft 11. One end of the auxiliary tightening screw 8 in contact with the pitch adjustment plate 5 is provided with a spherical head 801, and the pitch adjustment plate 5 is provided with a groove that cooperates with the spherical head 801. This setting can provide auxiliary support for the pitch adjustment plate 5. Especially when the pitch adjustment plate 5 is relatively long, the auxiliary tightening screw 8 can support and tighten the pitch adjustment plate 5 without affecting the rotation of the pitch adjustment plate 5, making the pitch adjustment plate 5 more stable.

[0032] Specifically, the pitch adjustment fixing frame 4 is provided with a locking screw assembly 12 for restricting the rotational freedom of the pitch adjustment plate 5. After the pitch adjustment plate 5 is finely adjusted in angle, the pitch adjustment plate 5 is locked to the pitch adjustment fixing frame 4 through the locking screw assembly 12. The operation is convenient and the structure is simple. Preferably, larger holes or waist-shaped holes can also be provided on the pitch adjustment fixing frame 4 to facilitate the fine adjustment of the pitch adjustment plate 5, so that when the pitch adjustment plate 5 adjusts the angle, the screw does not need to be taken out first, only needs not to be tightened, and can be directly locked after adjustment. The locking screw assembly 12 is composed of common screws, spring washers and flat washers.

[0033] Specifically, the grating 1 and the grating mounting plate 2 are fixed by bonding. This setting can effectively reduce the deformation of the grating 1 caused by external forces during installation. Preferably, it is fixed by adhesives such as liquid silicone. Liquid silicone has excellent transparency, tear strength, resilience, anti-yellowing property, thermal stability, water resistance, good air permeability, heat aging resistance and weather resistance. At the same time, its viscosity is moderate and it is easy to operate, which is very suitable for fixing the grating 1.

[0034] Specifically, an auxiliary mounting plate 3 is mounted on the grating mounting plate 2 by common screws. The auxiliary mounting plate 3 is located at the bottom of the grating 1. With this setting, the bottom of the grating 1 is abutted by the auxiliary mounting plate 3, which can play an auxiliary supporting role when installing the grating 1, and after the grating 1 is installed, the auxiliary mounting plate 3 can continuously support the grating 1.

[0035] Specifically, a rotation adjustment rotating shaft 16 is provided between the pitch adjustment plate 5 and the grating mounting plate 2. The rotation adjustment rotating shaft 16 is horizontally arranged along the width direction of the pitch adjustment fixing frame 4. With this setting, it is convenient for the grating mounting plate 2 to rotate around the rotation adjustment rotating shaft 16, so as to realize the adjustment of the left and right tilt angles of the grating 1, and the structure is simple.

[0036] Specifically, the pitch adjustment plate 5 and the grating mounting plate 2 are fixed by a connecting piece. After the adjusted grating mounting plate 2 and the pitch adjustment plate 5 are fixed by common threaded fasteners, the fixing effect is good and the disassembly and assembly are convenient.

[0037] Specifically, the tension screw 14 passes through the auxiliary adjustment plate 7 and is connected to the pitch adjustment plate 5, and the first ball head tightening screw 15 passes through the auxiliary adjustment plate 7 and abuts against the side wall of the pitch adjustment plate 5. With this setting, when it is necessary to push the pitch adjustment plate 5 to rotate inward, only the tension screw 14 needs to be loosened first, and then the first ball head tightening screw 15 is continuously tightened inward. When it is necessary to pull the pitch adjustment plate 5 outward, only the first ball head tightening screw 15 needs to be loosened outward, and then the tension screw 14 is screwed inward continuously, so that the tension screw 14 will pull the pitch adjustment plate 5 to rotate outward by a certain angle, thereby realizing the fine adjustment of the angle of the pitch adjustment plate 5, and the operation is convenient.

[0038] In this embodiment, the structures of the first ball head tightening screw 15, the second ball head tightening screw 9 and the auxiliary tightening screw 8 are basically the same.

[0039] In summary, the device of the present invention enables the grating 1 to realize the rotation adjustment of the X-axis, Y-axis and Z-axis, and they are independent of each other and do not interfere with each other. The adjustment effect is good, the adjustment is convenient, and the fixing effect after adjustment is good.

[0040] The parts not detailed in the present invention are prior art, so the present invention does not elaborate on them.

[0041] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "one" cannot be understood as a limitation on the number.

[0042] Although terms such as grating 1, grating mounting plate 2, auxiliary mounting plate 3, pitch adjustment fixing bracket 4, pitch adjustment plate 5, yaw adjustment base 6, auxiliary adjustment plate 7, auxiliary tightening screw 8, second ball head tightening screw 9, pitch adjustment rotating shaft 11, locking screw assembly 12, tension screw 14, first ball head tightening screw 15, rotation adjustment rotating shaft 16, pin hole 101, ball head 801, etc. are used more frequently in this text, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0043] The present invention is not limited to the above-mentioned optimal implementation manner. Anyone can obtain various other forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to that of this application, it falls within the protection scope of the present invention.

Claims

1. A transmissive grating adjustment device, characterized in that, it includes a yaw adjustment base with a pin hole at the bottom, a pitch adjustment fixing frame fixed to the top of the yaw adjustment base through a connecting member, and a pitch adjustment plate rotatably connected to the pitch adjustment fixing frame; an auxiliary adjustment plate is provided on the pitch adjustment fixing frame, and a tensioning screw and a first ball head pressing screw for cooperating with the pitch adjustment plate to adjust the rotation angle of the pitch adjustment plate are provided on the auxiliary adjustment plate; a grating mounting plate rotatably connected to the pitch adjustment plate is provided on the pitch adjustment plate, and a grating is mounted on the grating mounting plate; two second ball head pressing screws are provided on the pitch adjustment plate, and the tilt rotation angle of the grating mounting plate is adjusted through the two ball head pressing screws; a waist-shaped hole is provided on the yaw adjustment base, and the waist-shaped holes are uniformly arranged with the pin hole as the center; an auxiliary pressing screw coaxial with the pitch adjustment rotating shaft is provided on the pitch adjustment fixing frame, and a ball head portion is provided at one end of the auxiliary pressing screw in contact with the pitch adjustment plate, and a groove for cooperating with the ball head portion is provided on the pitch adjustment plate.

2. A transmissive grating adjustment device according to claim 1, characterized in that, a pitch adjustment rotating shaft cooperating with the pitch adjustment plate is provided on the pitch adjustment fixing frame, and the pitch adjustment rotating shaft is horizontally arranged along the length direction of the pitch adjustment fixing frame.

3. A transmissive grating adjustment device according to claim 1, characterized in that, a locking screw assembly for restricting the rotational freedom of the pitch adjustment plate is provided on the pitch adjustment fixing frame.

4. A transmissive grating adjustment device according to claim 1, characterized in that, the grating is fixed to the grating mounting plate by bonding.

5. A transmissive grating adjustment device according to claim 4, characterized in that, a detachable grating auxiliary mounting plate is provided on the grating mounting plate, and the grating auxiliary mounting plate is located at the bottom of the grating.

6. A transmissive grating adjustment device according to claim 1, characterized in that, a rotation adjustment rotating shaft is provided between the pitch adjustment plate and the grating mounting plate, and the rotation adjustment rotating shaft is horizontally arranged along the width direction of the pitch adjustment fixing frame.

7. A transmissive grating adjustment device according to claim 6, characterized in that, the pitch adjustment plate and the grating mounting plate are fixed through a connecting member.

8. A transmissive grating adjustment device according to any one of claims 1-7, characterized in that, the tensioning screw passes through the auxiliary adjustment plate and is connected to the pitch adjustment plate, and the first ball head pressing screw passes through the auxiliary adjustment plate and abuts against the side wall of the pitch adjustment plate.

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