Laser loop adjusting device for double-frequency laser interferometer
By designing a laser loop adjustment device for dual-frequency laser interferometer, the combination of rotary adjustment screw and steel balls is used to solve the problem of laser loop adjustment in wind tunnel tests, and the precise positioning and high-precision measurement of the model pitch angle and rolling angle are achieved. .
Patent Information
- Application Number
- CN202420664921.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-02
AI Technical Summary
In wind tunnel tests, the laser loop adjustment of the dual-frequency laser interferometer lacks suitable equipment, which makes it difficult to accurately locate the pitch angle and roll angle changes of the model, affecting the measurement accuracy and repeatability.
A laser circuit adjustment device including a base, a adjustment platform, an adjustment screw, a steel ball and a support rod is designed. By rotating the adjustment screw, the relative distance between the adjustment platform and the base is changed, and the support rod is shifted in the Z-axis direction. , realize accurate adjustment of optical refraction mirror.
The precise adjustment of the dual-frequency laser interferometer laser circuit is achieved, which improves the precise positioning ability of the model's pitch angle and rolling angle in wind tunnel tests, and ensures high-precision measurement and positioning repeatability.
Smart Images
Figure CN222280098U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of laser interference application, in particular to a laser circuit adjustment device used for a dual-frequency laser interferometer. Background Art
[0002] Dual-frequency laser interferometer is a heterodyne interferometer developed on the basis of single-frequency laser interferometer. Like single-frequency laser interferometer, dual-frequency laser interferometer is also an instrument that measures the measured length with wavelength as the standard. Dual-frequency laser interferometer can be used to calibrate measuring blocks, measuring rods, rulers and coordinate measuring machines in a constant temperature, constant humidity and shockproof metrology room. It can not only perform precise measurements of a large range of tens of meters, but also perform precise measurements of tiny movements such as watch parts. It can measure geometric quantities such as length, angle, straightness, parallelism, flatness, verticality, etc. It can also be used in special occasions, such as micro-positioning of semiconductor lithography technology and measurement of the spacing between recording grooves on computer memory.
[0003] In the field of wind tunnel testing, the pitch angle, roll angle and other postures of the test model need to be positioned and measured, so the optical path of the laser interferometer needs to be moved accordingly. Currently, there is no suitable equipment to adjust the laser circuit of the dual-frequency laser interferometer, which makes it difficult to accurately position during the test. Utility Model Content
[0004] The purpose of the utility model is to provide a laser circuit capable of accurately adjusting the z-axis direction of a dual-frequency laser interferometer. This solution can accurately locate the changes in the pitch angle and orbital angle of a model in a wind tunnel test, thereby achieving high-precision measurement of the moving displacement and positioning repeatability when the target object with a transmitting mirror moves (model movement).
[0005] This solution is achieved through the following technical measures:
[0006] A laser circuit adjustment device for a dual-frequency laser interferometer comprises a base, an adjustment platform, an adjustment screw, a steel ball and a support rod; the adjustment platform is arranged above the base; the adjustment screw can penetrate the adjustment platform and be connected to the base, and the relative distance between the adjustment platform and the base can be changed by rotating the adjustment screw; a steel ball is embedded between the adjustment platform and the base; and a support rod is fixedly arranged above the middle of the adjustment platform.
[0007] As a preferred embodiment of this solution: the adjustment platform and the base are rectangular structures with the same size.
[0008] As a preferred embodiment of this solution: the steel ball is arranged at one corner of the base; there are two adjusting screws, which are respectively arranged at diagonal positions of the base.
[0009] As a preferred embodiment of this solution: a spring group is connected between the adjustment platform and the base.
[0010] As a preferred embodiment of this solution: the support rod can be connected to the optical refractor.
[0011] As a preferred embodiment of this solution: the spring group is in a compressed state when in working state.
[0012] The beneficial effects of the present scheme can be known from the description of the above scheme. Since a steel ball is embedded in a corner of the adjustment platform and the base in the present scheme, and an adjusting screw is arranged diagonally on the base, the adjustment platform can be displaced in the horizontal and vertical directions relative to the base by rotating the adjusting screw, thereby driving the support rod to be offset in the Z-axis direction, realizing the offset of the optical refractor on the support rod in the Z-axis direction, thereby realizing the precise adjustment of the laser circuit of the dual-frequency laser interferometer.
[0013] It can be seen that compared with the prior art, the utility model has substantial characteristics and progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model.
[0015] In the figure, 1 is the base, 2 is the adjustment platform, 3 is the adjustment screw, 4 is the steel ball, 5 is the support rod, and 6 is the spring group. DETAILED DESCRIPTION
[0016] In order to clearly illustrate the technical features of the present solution, the present solution is described below through a specific implementation method and in conjunction with its accompanying drawings.
[0017] As can be seen from the attached drawings, the present scheme includes a base, an adjustment platform, an adjustment screw, a steel ball and a support rod; the adjustment platform is arranged above the base; the adjustment screw can penetrate the adjustment platform and be connected to the base, and the relative distance between the adjustment platform and the base can be changed by rotating the adjustment screw; a steel ball is embedded between the adjustment platform and the base; a support rod is fixedly arranged above the middle of the adjustment platform. The adjustment platform and the base are rectangular structures of the same size. The steel ball is arranged at one corner of the base; there are two adjustment screws, which are arranged at the diagonal positions of the base respectively. A spring group is connected between the adjustment platform and the base. The support rod can be connected to the optical refractor. The spring group is in a compressed state when in working state.
[0018] During specific use, by rotating the adjustment screw, the adjustment platform can be displaced in the horizontal and vertical directions relative to the base, thereby driving the support rod to shift in the Z-axis direction, realizing the displacement of the optical refractor on the support rod in the Z-axis direction, thereby achieving precise adjustment of the laser circuit of the dual-frequency laser interferometer.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A laser circuit adjustment device for a dual-frequency laser interferometer, characterized in that: It includes a base, an adjustment platform, an adjustment screw, a steel ball and a support rod; the adjustment platform is arranged above the base; the adjustment screw can penetrate the adjustment platform and be connected to the base, and the relative distance between the adjustment platform and the base can be changed by rotating the adjustment screw; a steel ball is embedded between the adjustment platform and the base; a support rod is fixedly arranged above the middle of the adjustment platform.
2. The laser circuit adjustment device for a dual-frequency laser interferometer according to claim 1, characterized in that: The adjustment platform and the base are rectangular structures with the same size.
3. The laser circuit adjustment device for a dual-frequency laser interferometer according to claim 2, characterized in that: The steel ball is arranged at one corner of the base; there are two adjusting screws, which are respectively arranged at diagonal positions of the base.
4. The laser circuit adjustment device for a dual-frequency laser interferometer according to claim 1, characterized in that: A spring group is connected between the adjustment platform and the base.
5. The laser circuit adjustment device for a dual-frequency laser interferometer according to claim 1, characterized in that: The support rod can be connected to an optical refractor.
6. The laser circuit adjustment device for a dual-frequency laser interferometer according to claim 4, characterized in that: The spring assembly is in a compressed state when in working state.