Laser beam collimation calibration tool

Abstract

The utility model relates to the technical field of laser, in particular to a laser beam collimation calibration tool. The rear end of the light focusing cylinder is mounted on the laser and surrounds the light outlet, and a light sensing target is fixed at the front end of the light focusing cylinder; the number of the lens bases is two, prisms are installed in the lens bases, the two lens bases are placed in the beam focusing cylinder, laser beams sequentially pass through the lens bases, and when the laser beams deflect, due to the refraction effect of the prisms, the deflected light beams can generate angle deviation after passing through the prisms, the deflection angle is enlarged, and observation is convenient; when the laser beam is collimated, the laser does not deflect and is still projected to the center of the light sensing target in a collimated state.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, specifically to a laser beam collimation and calibration tool. Background Technology

[0002] Laser beam collimation testing can be performed by setting a target at a distance from the laser's output port and observing whether the projected light spot is centered on the target to determine the beam collimation, as shown in CN220508385U.

[0003] When the laser beam deflection angle is small, the center of the spot is close to the center of the target, making it difficult to observe the beam deflection.

[0004] Therefore, a laser beam collimation calibration tool is designed to amplify the skewness of the laser beam when needed, making it easier to observe whether skewness has occurred. Utility Model Content

[0005] (I) Technical Issues

[0006] The present invention aims to at least solve the problem in the prior art of how to improve detection clarity when the center of the laser beam projected onto the target is close to the target center.

[0007] (II) Technical Content

[0008] This solution provides a laser beam collimation calibration tool, achieved through the following specific technical means, including:

[0009] The optical tube is mounted on the laser at the rear end and surrounds the light outlet, while a photosensitive target is fixed at the front end.

[0010] There are two sets of mirror mounts, each containing a prism. The two sets of mirror mounts are placed in a focusing tube, through which the laser beam passes sequentially. When the laser beam is deflected, due to the refraction of the prism, the deflected beam will experience an angular shift after passing through the prism, amplifying the deflection angle and increasing the offset of the laser beam projected onto the photosensitive target. When the laser beam is collimated, the laser does not deflect and remains collimated, projecting onto the center of the photosensitive target.

[0011] Preferred technical solution 1: The position of the lens mount in the light tube is adjustable, so that the magnified light spot after deflection can be projected onto the photosensitive target.

[0012] Preferred technical solution 2: The focusing tube includes an annular rear seat and a tube body. The annular rear seat is mounted on the laser and surrounds the light outlet. Multiple sets of parallel crossbars are fixed on the front circumference of the annular rear seat, and the mirror mount is slidably sleeved on the crossbars.

[0013] The photosensitive target is located at the front end of the cylinder, and during installation, the rear end of the cylinder is inserted into the annular rear seat.

[0014] Preferred technical solution three: The crossbar has markings.

[0015] Preferred technical solution four: It also includes a fixing seat fixed on the laser and surrounding the light outlet, wherein the annular rear seat is detachably connected to the fixing seat.

[0016] Preferred technical solution five: The annular rear seat has a plugging protrusion, and the fixed seat has a plugging hole, with an interference fit between the two.

[0017] (III) Technical Effects

[0018] The above structure gives this solution the following advantages:

[0019] 1. Based on routine testing, the collimation of the laser beam can be tested according to the testing results;

[0020] When there is disagreement about the detection results being close to the target, the deflection angle of the laser can be magnified by configuring the mirror mount, making it easier to observe;

[0021] 2. The whole structure is easy to disassemble and assemble. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0024] Figure 2 This is a diagram showing the installation status of the mirror mount in this solution;

[0025] Figure 3 This is an exploded view of the plan;

[0026] Figure 4 This diagram shows the installation status of the mounting base and laser in this solution.

[0027] Among them, 1. Focusing tube, 11. Annular rear seat, 111. Insertion protrusion, 12. Tube body, 13. Crossbar, 131. Scale, 14. Photosensitive target, 2. Lens mount, 21. Prism, 3. Fixing base, 31. Insertion hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-2 A laser beam collimation calibration tool includes a focusing tube 1 and a mirror mount 2. The rear end of the focusing tube 1 is mounted on the laser and surrounds the light outlet. A photosensitive target 14 is fixed at the front end. The photosensitive target 14 has a photosensitive film made of aluminum oxide. When the laser beam on the laser is projected onto the photosensitive target 14, a light spot is formed. By observing the projection position of the light spot on the photosensitive target 14, that is, the distance between the light spot and the center of the crosshair on the photosensitive target 14, the laser beam collimation is determined.

[0030] There are two sets of mirror mounts 2, and each set of mirror mounts 2 contains an identical prism 21 with a small apex angle (e.g., a few degrees). When in use, the two sets of mirror mounts 2 are placed in the focusing tube 1 and placed closely together, allowing the laser beam to pass through sequentially. When the laser beam collimation is deflected, due to the refraction of the prism 21, the deflected beam will produce a small angular shift after passing through the prism 21. According to the refraction law of the prism 21, the deflection angle of the light in the prism 21 is related to the incident angle and the apex angle of the prism 21. By selecting a suitable apex angle and material for the prism 21, this small angular shift caused by the deflection can be magnified, thus magnifying the deflection angle of the light spot projected onto the photosensitive target 14, making it easier to observe.

[0031] Calculation example: Assume that the apex angle of prism 21 is θ (e.g., 5°), and the minimum deflection angle of the laser beam in prism 21 is δ (which is related to the initial deflection angle of the beam and the refractive index of the material of prism 21).

[0032] When the collimation deflection angle of the laser beam is α, the deflection angle β after passing through prism 21 can be approximately calculated using geometric relationships as β≈α×(n-1)×(θ / 90°), where n is the refractive index of the prism 21 material;

[0033] If α = 0.1°, θ = 5°, and n = 1.5, then β ≈ 0.1° × (1.5 - 1) × (5 / 90) ≈ 0.0028°, which shows that the skew angle is amplified to a certain extent.

[0034] If the laser beam is collimated, it will remain collimated after passing through the prism;

[0035] For example, the prism can be designed as an asymmetrical wedge shape, meaning the two refractive surfaces are not parallel and the wedge angle is not uniform within a certain range. This design allows the light beam to maintain its original direction after multiple refractions within the prism due to the special variation in the wedge angle when the laser beam is collimated.

[0036] Alternatively, the refractive index inside the prism may exhibit a gradual distribution, such as increasing or decreasing from the center to the edge. When a collimated laser beam enters a prism with a gradually changing refractive index, the light will bend due to the change in refractive index. By carefully designing the gradient distribution of the refractive index, the bending paths of the light within the prism can be mutually compensated, thus ensuring that the direction of the final outgoing light remains essentially unchanged. However, for a laser beam that is incident at an angle, the angle between its incident angle and the prism axis results in different refractive indices at different locations, leading to a greater change in the direction of light propagation and thus amplifying the angle of deflection.

[0037] Please see Figures 2-3 The laser beam collimation and calibration tool includes an annular rear seat 11 and a cylinder 12, wherein the cylinder 12 is an opaque cylinder, the annular rear seat 11 is mounted on the laser and surrounds the light outlet, and the center of the annular rear seat 11 coincides with the center of the light outlet.

[0038] Multiple sets of parallel crossbars 13 are fixed on the front periphery of the annular rear seat 11. The crossbars 13 have scales 131 to indicate the position of the mirror mount 2. The mirror mount 2 is slidably sleeved on the crossbars 13 to achieve the adjustable position of the mirror mount 2. Based on the adjustable position of the mirror mount 2 in the light tube 1, the magnified light spot after deflection can be projected onto the photosensitive target 14.

[0039] The photosensitive target 14 is fixed to the front end of the cylinder 12, while the rear end of the cylinder 12 is inserted into the annular rear seat 11, and the crossbar 13 and the mirror mount 2 are covered inside.

[0040] During the first inspection, do not install the lens mount 2. Only connect and install the cylinder 12 with the annular rear seat 11, start the laser to emit a laser beam, and observe the position of the laser beam spot on the sensory target 14. If it is found that the center of the spot is close to the center of the target and the deviation angle is small, making it inconvenient to judge, then install the lens mount 2. That is, first remove the cylinder 12, install and adjust the position of the lens mount 2, and then cover the cylinder 12. If there is deviation, the deviation angle will be magnified for easier observation. If it is collimated, the position of the spot will remain unchanged.

[0041] Please see Figures 2-4The laser beam collimation and calibration tool also includes a mounting base 3 that is bonded and fixed to the laser and surrounds the light outlet. The annular rear seat 11 is detachably connected to the mounting base 3 to achieve rapid separation of the optical tube 1 and the laser. Specifically, the annular rear seat 11 has a plugging protrusion 111, and the mounting base 3 has a plugging hole 31. The two are interference-fitted to achieve rapid and stable docking between them.

[0042] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser beam collimation and calibration tool, comprising a focusing tube (1), the rear end of which is mounted on a laser and surrounds the light outlet, and a sensing target (14) fixed at the front end, characterized in that: It also includes a mirror mount (2), in which a prism (21) is installed, and the mirror mount (2) is placed in a focusing tube (1); The mirror mount (2) has two sets; The prism (21) maintains its direction when a collimated laser beam passes through it; and amplifies the deflection angle when a deflected laser beam passes through it.

2. The laser beam collimation calibration tool according to claim 1, characterized in that: The position of the mirror mount (2) in the focusing tube (1) is adjustable.

3. The laser beam collimation calibration tool according to claim 2, characterized in that: The light-focusing tube (1) includes an annular rear seat (11) and a tube body (12). The annular rear seat (11) is mounted on the laser and surrounds the light outlet. Multiple sets of parallel crossbars (13) are fixed on the front side of the annular rear seat (11), and the mirror mount (2) is slidably sleeved on the crossbars (13). The front end of the cylinder (12) is fixed with a photosensitive target (14), while the rear end of the cylinder (12) is inserted into the annular rear seat (11), and the crossbar (13) and the mirror mount (2) are covered inside.

4. The laser beam collimation calibration tool according to claim 3, characterized in that: The crossbar (13) has markings (131).

5. A laser beam collimation calibration tool according to claim 3, characterized in that: It also includes a mounting base (3) fixed to the laser and surrounding the light outlet, wherein the annular rear seat (11) is detachably connected to the mounting base (3).

6. The laser beam collimation calibration tool according to claim 3, characterized in that: The cylinder (12) is an opaque cylinder.

7. The laser beam collimation calibration tool according to claim 1, characterized in that: The photosensitive target (14) has a photosensitive film.

Images