Laser marking instrument

Abstract

The invention relates to a laser line marking instrument. A pair of light beams output by a first laser generator and a second laser generator at the same time sequentially pass through a total reflection prism assembly and a conscope and then are diverged towards the periphery by 360 degrees; wherein the pair of light beams passes through the total reflection prism assembly to form light beams which are distributed on the same central axis and have cross-shaped or X-shaped sections. The power of the cross-shaped or X-shaped light beam section at all angles around is uniform, so that the light beam is diverged around by 360 degrees after passing through the conscope, the brightness of laser rays formed on the target wall around is uniform in the length direction, and obvious bright areas and dark areas do not exist.

Description

Technical Field

[0001] The invention relates to the technical field of optical measurement and marking instruments, in particular to a laser marking instrument. Background Art

[0002] Laser marking instrument is an optical-mechanical-electrical integrated instrument. It mostly uses 635nm laser diodes to project visible red horizontal straight lines and plumb lines on the wall. The automatic compensator inside the instrument can maintain the horizontal (or plumb) position of the laser projection line. It is mainly used in interior decoration, door and window installation, pipeline laying, tunnel excavation, plumb line hanging, quality inspection and engineering supervision and other construction projects. It is an indispensable instrument in measurement.

[0003] Patent document CN107796378A discloses a laser marking instrument using a conical mirror, including a laser generating assembly, the laser generating assembly including a cylinder, at least the upper section of the cylinder is transparent, the conical mirror is fixed to the upper port of the cylinder, and the conical surface of the conical mirror is arranged inward. The lower section of the cylinder is provided with a lens assembly of the laser generating assembly, and a laser generator is arranged below the lens assembly. The conical surface of the conical mirror is arranged corresponding to the upper section of the cylinder, so that the laser reflected by the conical surface diverges 360° from the transparent upper section to the surroundings, forming a laser surface, and forming laser lines on the surrounding target walls.

[0004] The laser marking instrument of the above-mentioned prior art has the following defects: 1. Because it needs to output a 360° light source and form a laser line on the target wall, the brightness of the laser line is often low; 2. The cross-section of the light beam emitted by the existing laser generator is elliptical, and the power in the long axis direction of the ellipse is high, and the power of the light beam in the short axis direction is low, resulting in obvious differences in the output power of the light source in different directions, and there are obvious bright and dark areas, that is, the laser line formed on the target wall has alternating bright and dark areas in the length direction, that is, there is a problem of uneven brightness. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a laser marking instrument with high brightness of laser lines formed on surrounding target walls and relatively uniform brightness in the length direction.

[0006] In order to solve the above problems, the present invention provides a laser marking instrument, including: a laser generator, a conical mirror, the laser generator includes a first laser generator and a second laser generator, a pair of light beams simultaneously output by the first laser generator and the second laser generator are sequentially transmitted through a total reflection prism assembly and the conical mirror and then diverge 360° in all directions; wherein, after passing through the total reflection prism assembly, the pair of light beams form light beams distributed along the same central axis and having a cross-shaped or X-shaped cross-section.

[0007] A preferred solution is that the total reflection prism assembly includes a first total reflection prism and a second total reflection prism; the oblique surfaces of the first and second total reflection prisms are overlapped, so that the total reflection prism assembly is a cube.

[0008] The preferred solution is that the laser marking instrument also includes a lens barrel, the conical surface of the conical mirror is arranged in a transparent tube, and the transparent tube is placed on the top opening of the lens barrel; the first laser generator is arranged at the bottom of the lens barrel, and the second laser generator is arranged on the through hole in the middle of the wall of the lens barrel, and the light output by the first and second laser generators is vertically distributed; a square side surface of the first and second total reflection prisms is respectively vertically distributed with the light output by the first and second laser generators, so that a pair of light beams output by a pair of laser generators form light beams distributed with the same central axis after passing through the total reflection prism assembly. During assembly, by adjusting the rotation angle of the first and second laser generators, the cross section of the light beam distributed with the same central axis can be made cross-shaped or X-shaped.

[0009] In order to assemble and debug separately, a preferred solution is that the laser marking instrument also includes a laser tube holder arranged at the bottom end of the lens barrel, the first laser generator is arranged in the middle and lower part of the laser tube holder, and the total reflection prism assembly is arranged in the middle and upper part of the laser tube holder; a through hole opposite to the second laser generator is provided in the middle and upper part of the wall of the laser tube holder, so that the laser output by the second laser generator enters the second total reflection prism.

[0010] A preferred solution is that the laser marking instrument further comprises a lens tube holder for accommodating the aspheric lens, and the lens tube holder is arranged in the lens barrel and above the laser tube holder.

[0011] A preferred solution is that a pair of bolts for adjusting the axial angle of the lens holder to achieve beam axis adjustment is provided on the outer wall of the lens barrel.

[0012] A preferred solution is that the conical mirror, aspherical lens, and total reflection prism assembly are coaxial with the laser beam output by the first laser generator.

[0013] Technical effects of the invention: (1) The laser marking instrument of the present invention adopts a pair of laser generators to output a pair of light beams which are formed into light beams distributed along the same central axis after passing through a total reflection prism assembly. Compared with a single laser generator, the brightness of the laser line on the target wall can be greatly improved; at the same time, the pair of light beams pass through the total reflection prism assembly to form a laser beam with a cross-shaped or X-shaped cross-section. (2) Compared with the problem of high power in the long axis direction and low power in the short axis direction of the elliptical beam in the prior art, the present invention forms a beam with a cross-shaped or X-shaped cross-section after a pair of beams with elliptical cross-sections pass through a total reflection prism assembly, so that the long axes of the pair of elliptical cross-sections of a pair of coaxial elliptical beams are perpendicular or intersecting, thereby making the power difference of the cross-shaped or X-shaped beam in different directions smaller, and the power of the cross-shaped or X-shaped beam at all angles is more uniform, so that the cross-shaped or X-shaped beam diverges 360° in all directions after passing through the conical mirror, and the laser lines formed on the target walls on all sides have a more uniform brightness in the length direction, and there are no obvious bright and dark areas. Among them, the cross-shaped beam cross-section has the best effect, thereby improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a schematic diagram of a partially exploded structure of the laser marking instrument of the present invention; Figure 2 It is an axial cross-sectional view of the laser marking instrument of the present invention; Figure 3 The conical mirror 1 and the transparent tube 2 are composed of a combination 21; Figure 4 The second assembly 22 is composed of the lens barrel 3 and the second laser generator; Figure 5 The third assembly 23 is composed of the lens holder 6 and the aspherical lens 7; Figure 6 The laser tube holder 8, the first laser generator 11 and the total reflection prism assembly 25 constitute the assembly 43 24; Figure 7 is a schematic diagram of the light beam having a cross-shaped cross section. DETAILED DESCRIPTION Example

[0015] like Figures 1 to 7The laser marking instrument of this embodiment includes: a conical mirror 1, the conical surface of the conical mirror 1 is arranged in a transparent tube 2, the bottom of the transparent tube 2 is placed on the top opening of the lens barrel 3; the bottom end of the lens barrel 3 is provided with a laser tube holder 8, the first laser generator 11 is arranged in the middle and lower part of the laser tube holder 8, and the total reflection prism assembly 25 is arranged in the middle and upper part of the laser tube holder 8; the second laser generator 5 is arranged on the through hole in the middle part of the wall of the lens barrel 3, and the middle and upper part of the wall of the laser tube holder 8 is provided with a through hole opposite to the second laser generator 5, so that the laser output by the second laser generator 5 enters the second total reflection prism 9.

[0016] The light beams outputted by the first and second laser generators are vertically distributed; a square side surface of the first and second total reflection prisms is vertically distributed with the light beams outputted by the first and second laser generators, respectively, so that a pair of light beams outputted by a pair of laser generators form light beams distributed with the same central axis after passing through the total reflection prism assembly. During assembly, by adjusting the angles of the first and second laser generators, the cross section of the light beams distributed with the same central axis can be made cross-shaped or X-shaped.

[0017] The laser marking instrument further comprises a lens tube holder 6 for accommodating the aspheric lens 7 . The lens tube holder 6 is arranged in the lens barrel 3 and is located above the laser tube holder 8 .

[0018] A pair of light beams simultaneously output by the first laser generator 11 and the second laser generator 5 diverge 360° in all directions after passing through the total reflection prism assembly 25 and the conical mirror 1 in turn; wherein, the pair of light beams form light beams distributed along the same central axis and having a cross-shaped or X-shaped cross-section after passing through the total reflection prism assembly 25.

[0019] The total reflection prism assembly 25 includes a first total reflection prism 10 and a second total reflection prism 9. The oblique surfaces of the first and second total reflection prisms are overlapped and fixed with glue, so that the total reflection prism assembly 25 is a cube.

[0020] A pair of bolts 4 are provided on the outer wall of the lens barrel 3 for adjusting the axial angle of the lens holder 6 to achieve the adjustment of the beam axis angle.

[0021] The conical mirror 1, transparent tube 2, lens barrel 3, lens holder 6, aspherical lens 7, laser holder 8, total reflection prism assembly 25 are arranged coaxially with the laser beam output by the first laser generator 11. The beam with a cross-shaped or X-shaped cross section can be focused by adjusting the relative position of assembly three and assembly two.

[0022] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A laser marking instrument, comprising: A laser generator and a conical mirror (1), characterized in that the laser generator comprises a first laser generator and a second laser generator (11, 5), and a pair of light beams simultaneously output by the first laser generator and the second laser generator are sequentially transmitted through a total reflection prism assembly (25) and the conical mirror (1) and then diverge 360 ​​degrees in all directions; wherein the pair of light beams are formed into light beams distributed along the same central axis and having a cross-shaped or X-shaped cross section after passing through the total reflection prism assembly (25).

2. The laser marking instrument according to claim 1, characterized in that: The total reflection prism assembly (25) comprises a first total reflection prism and a second total reflection prism (10, 9); the oblique surfaces of the first and second total reflection prisms are superimposed, so that the total reflection prism assembly (25) is in the form of a cube.

3. The laser marking instrument according to claim 2, characterized in that: The laser marking instrument further comprises a lens barrel (3), wherein the conical surface of the conical mirror (1) is arranged in a transparent tube (2), and the transparent tube (2) is placed on the top opening of the lens barrel (3); the first laser generator (11) is arranged at the bottom of the lens barrel (3), and the second laser generator (5) is arranged on a through hole in the middle of the wall of the lens barrel (3), and the light beams output by the first and second laser generators are vertically distributed; and a square side surface of the first and second total reflection prisms is vertically distributed with the light beams output by the first and second laser generators, respectively.

4. The laser marking instrument according to claim 3, characterized in that: The laser marking instrument further comprises a laser tube holder (8) arranged at the bottom end of the lens barrel (3); the first laser generator (11) is arranged at the middle and lower part of the laser tube holder (8); and the total reflection prism assembly (25) is arranged at the middle and upper part of the laser tube holder (8); a through hole opposite to the second laser generator (5) is provided in the middle and upper part of the wall of the laser tube holder (8) so that the laser output by the second laser generator (5) enters the second total reflection prism (9).

5. The laser marking instrument according to any one of claims 1 to 4, characterized in that: The laser marking instrument also includes a lens tube seat (6) for accommodating the aspheric lens (7); the lens tube seat (6) is arranged in the lens barrel (3) and is located above the laser tube seat (8).

6. The laser marking instrument according to claim 5, characterized in that: A pair of bolts (4) for adjusting the axial angle of the lens tube seat (6) to achieve beam axis adjustment are provided on the outer wall of the lens barrel (3).

7. The laser marking instrument according to claim 5, characterized in that: The conical mirror (1), the aspherical lens (7), the total reflection prism assembly (25) and the laser beam output by the first laser generator (11) are coaxial.

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