CN217036308U - Laser long-distance focusing assembly - Google Patents
Laser long-distance focusing assembly Download PDFInfo
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- CN217036308U CN217036308U CN202220772487.5U CN202220772487U CN217036308U CN 217036308 U CN217036308 U CN 217036308U CN 202220772487 U CN202220772487 U CN 202220772487U CN 217036308 U CN217036308 U CN 217036308U
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Abstract
The utility model relates to a laser long-distance focusing assembly, comprising: the light-emitting device comprises a beam expander set and an aspherical mirror, wherein the aspherical mirror is arranged on the light-emitting side of the beam expander set. The beneficial effects are that: the laser beam that the laser instrument transmitted penetrates into the beam expanding mirror group earlier to expand by the beam expanding mirror group, with laser spot enlarge certain multiple, the laser beam after expanding penetrates aspherical mirror again, and the light beam after expanding passes through aspherical mirror and assembles the point at the distal end, in order to realize long-range focus, in addition, makes the focus light spot littleer energy density higher through aspherical mirror.
Description
Technical Field
The utility model relates to the field of optics, in particular to a laser long-distance focusing assembly.
Background
Due to the high power and excellent energy transmission capability of laser, laser has gained important application in industry, medical treatment and military, and the research work in laser application has become the focus of research in the optical field. In some applications, it is desirable to transmit high power laser emissions to a remote target surface to achieve a high energy density focused spot. To achieve this, at least two important conditions are required: high-power laser and laser focusing are performed, at present, aiming at laser focusing, cutting and welding of optical fiber transmission and the like are mainly used in the market, and the laser focusing is a short-distance focusing mode and cannot be applied to scenes aiming at some special distance operation.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a laser long-distance focusing assembly to overcome the above-mentioned deficiencies in the prior art.
The technical scheme for solving the technical problems is as follows: a laser remote focus assembly comprising: the light-emitting device comprises a beam expander set and an aspherical mirror, wherein the aspherical mirror is arranged on the light-emitting side of the beam expander set.
On the basis of the technical scheme, the utility model can be improved as follows.
Furthermore, the mirror surface of the aspherical mirror is coated with an antireflection film, and the transmittance is more than 99.8 percent.
Furthermore, the precision of the lens surface type of the aspherical mirror is 4/lambda-10/lambda, the tolerance of the lens focal length is less than +/-1%, and the eccentricity of the lens is 1 '-10'.
Furthermore, the beam expanding lens group is composed of two spherical mirrors, namely a first spherical mirror and a second spherical mirror, and the first spherical mirror, the second spherical mirror and the aspherical mirror are sequentially arranged along a light path propagation path.
Furthermore, the mirror surfaces of the first spherical mirror and the second spherical mirror are plated with antireflection films, and the transmittance is greater than 99.8%.
Furthermore, the accuracy of the lens surface types of the first spherical mirror and the second spherical mirror is 4/lambda-10/lambda, the focal length tolerance of the lenses is less than +/-1%, and the eccentricity of the lenses is 1 '-10'.
The beneficial effects of the utility model are:
1) the laser beam emitted by the laser firstly enters the beam expanding lens group and is expanded by the beam expanding lens group so as to enlarge the laser spot by a certain multiple, the expanded laser beam then enters the aspherical mirror, and the expanded light beam is converged at a remote point through the aspherical mirror so as to realize remote focusing;
2) the beam expanding lens group is composed of a first spherical mirror and a second spherical mirror, and different beam expanding multiples and focusing distance adjustment can be achieved by adjusting the distance between the first spherical mirror and the second spherical mirror.
Drawings
Fig. 1 is a block diagram of a laser remote focus assembly according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the beam expander set comprises a beam expander set body, 110, a first spherical mirror, 120, a second spherical mirror, 2 and an aspherical mirror.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.
Example 1
As shown in fig. 1, a laser remote focus assembly, comprising: a beam expander set 1 and an aspherical mirror 2, wherein the aspherical mirror 2 is arranged at the light-emitting side of the beam expander set 1,
the beam expander group 1 is used for expanding laser spots by a certain multiple;
the aspherical mirror 2 is similar to a spherical mirror, reduces the aberration of the lens, can make the focusing light spot smaller, and is used for focusing;
when in specific use: the laser beam that the laser instrument sent penetrates beam expanding lens group 1 earlier to expand by beam expanding lens group 1, with laser facula enlarge certain multiple, the laser beam after expanding penetrates aspherical mirror 2 again, the light beam after expanding assembles a point at the distal end through aspherical mirror 2, accomplishes the focus.
Example 2
As shown in fig. 1, this embodiment is a further improvement on embodiment 1, and specifically includes the following steps:
the mirror surface of the aspherical mirror 2 is coated with an antireflection film, and the transmittance is more than 99.8 percent.
Furthermore, the lens surface type precision of the aspherical mirror 2 is 4/lambda-10/lambda, the lens focal distance tolerance is less than +/-1%, and the lens eccentricity is 1 '-10'.
Example 3
As shown in fig. 1, this embodiment is a further improvement on embodiment 1 or 2, and specifically includes the following steps:
the beam expanding lens group 1 is composed of two spherical mirrors, namely a first spherical mirror 110 and a second spherical mirror 120, the first spherical mirror 110, the second spherical mirror 120 and the aspherical mirror 2 are sequentially arranged along a light path propagation path, and different beam expanding multiples and focusing distance adjustment can be realized by adjusting the distance between the first spherical mirror 110 and the second spherical mirror 120.
Example 4
As shown in fig. 1, this embodiment is a further improvement on embodiment 3, and specifically includes the following steps:
the mirror surface of the first spherical mirror 110 is coated with an antireflection film, and the transmittance is more than 99.8%; the mirror surface of the second spherical mirror 120 is coated with an anti-reflection film, and the transmittance is greater than 99.8%.
Furthermore, the accuracy of the lens surface shape of the first spherical mirror 110 is 4/lambda-10/lambda, the tolerance of the lens focal length is less than +/-1%, and the lens eccentricity is 1 '-10'; the surface type precision of the second spherical mirror 120 is 4/lambda-10/lambda, the focal length tolerance of the lens is less than +/-1%, and the eccentricity of the lens is 1 '-10'.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A laser remote focus assembly, comprising: the light source comprises a beam expander set (1) and an aspherical mirror (2), wherein the aspherical mirror (2) is arranged on the light emergent side of the beam expander set (1);
the beam expanding lens group (1) is composed of two spherical mirrors, namely a first spherical mirror (110) and a second spherical mirror (120), wherein the first spherical mirror (110), the second spherical mirror (120) and the aspherical mirror (2) are sequentially arranged along a light path propagation path.
2. A laser remote focus module as set forth in claim 1, wherein: the mirror surface of the aspherical mirror (2) is plated with an antireflection film, and the transmittance is more than 99.8%.
3. A laser remote focus module as set forth in claim 2, wherein: the lens surface type precision of the aspherical mirror (2) is 4/lambda-10/lambda, the lens focal distance tolerance is less than +/-1%, and the lens eccentricity is 1 '-10'.
4. A laser remote focusing assembly as claimed in claim 1, wherein: and the mirror surfaces of the first spherical mirror (110) and the second spherical mirror (120) are plated with antireflection films, and the transmittance is more than 99.8%.
5. A laser remote focus module as set forth in claim 4, wherein: the lens surface type precision of the first spherical mirror (110) and the second spherical mirror (120) is 4/lambda-10/lambda, the lens focal length tolerance is less than +/-1%, and the lens eccentricity is 1 '-10'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220772487.5U CN217036308U (en) | 2022-04-06 | 2022-04-06 | Laser long-distance focusing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220772487.5U CN217036308U (en) | 2022-04-06 | 2022-04-06 | Laser long-distance focusing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217036308U true CN217036308U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220772487.5U Active CN217036308U (en) | 2022-04-06 | 2022-04-06 | Laser long-distance focusing assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217036308U (en) |
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2022
- 2022-04-06 CN CN202220772487.5U patent/CN217036308U/en active Active
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