A laser capable of outputting multiple beams of the same energy and the same spot

Abstract

The application discloses a laser capable of outputting multiple beams of same energy and same light spot, which comprises a laser generating device capable of emitting laser outwardly, a beam expander arranged on the path of the laser emitted outwardly by the laser generating device, a transverse light path formed along the X-axis direction after the laser passes through the beam expander, n first beam splitters capable of reflecting and transmitting laser arranged at intervals on the transverse light path, n longitudinal light paths formed along the Y-axis direction after the laser is reflected at each first beam splitter, and a second beam splitter on each longitudinal light path arranged staggeredly with the second beam splitters on other longitudinal light paths, and the laser further comprises a diaphragm arranged at intervals at the output end position of each longitudinal light path. The application aims at overcoming the shortcomings of the prior art and providing a laser capable of outputting multiple beams of same energy and same light spot.

Description

[Technical Field]

[0001] This invention relates to a laser capable of outputting multiple beams of the same energy and the same spot size. [Background Technology]

[0002] Currently, in the field of laser processing, the optical path splitting system is an important component of laser processing machinery. During laser processing, due to the different processing requirements of different workpieces, there are more requirements for the beam path, sometimes even necessitating multi-beam processing. However, it is difficult to guarantee that multiple laser beams output from the same laser have the same energy and spot size, thus failing to meet the needs of specific processing applications.

[0003] Therefore, the present invention was developed in response to the above-mentioned shortcomings. [Summary of the Invention]

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a laser that can output multiple laser beams with the same energy and the same spot shape and size.

[0005] This invention is achieved through the following technical solution:

[0006] A laser capable of outputting multiple beams of the same energy and the same spot size includes a laser generating device 1 capable of emitting laser light outwards. A beam expander 2 is provided on the path of the laser light emitted outwards from the laser generating device 1. After passing through the beam expander 2, the laser light forms a transverse optical path 3 emitted along the X-axis. The transverse optical path 3 is provided with n first beam splitters 4 that can both reflect and transmit laser light at intervals. The laser light is reflected at each of the first beam splitters 4 to form n longitudinal optical paths 5 emitted along the Y-axis. The number am of second beam splitters 6 that can both reflect and transmit laser light on the m-th longitudinal optical path 5 satisfies the following formula: am = nm, where 1 ≤ m ≤ n, n ≥ 2. The first beam splitters 4 and the second beam splitters 6 have the same reflectivity and transmittance. Furthermore, the second beam splitters 6 on each longitudinal optical path 5 are staggered from the second beam splitters 6 on other longitudinal optical paths 5. The laser also includes apertures 7 spaced at the output end of each longitudinal optical path 5.

[0007] The number of the first beam splitter 4 is 3, the number of the second beam splitter 6 on the first longitudinal optical path 5 is 2 (a1), the number of the second beam splitter 6 on the second longitudinal optical path 5 is 1 (a2), and the number of the second beam splitter 6 on the third longitudinal optical path 5 is 0 (a3).

[0008] The reflectivity of the first beam splitter 4 and the second beam splitter 6 is R%, and the transmittance of the first beam splitter 4 and the second beam splitter 6 is 1-R.

[0009] The first beam splitter 4 and the second beam splitter 6 are beam splitters with 8% reflectivity and 92% transmittance.

[0010] The aperture 7 mentioned above is an adjustable aperture.

[0011] Compared with the prior art, the present invention has the following advantages: In use, the laser generator is first activated, emitting laser light. This laser light passes through the beam expander, forming a transverse optical path. First beam splitters spaced at intervals along the transverse optical path divide it into multiple longitudinal optical paths. Second beam splitters are positioned along the longitudinal optical paths to transmit and reflect the light. Furthermore, the second beam splitters on each longitudinal optical path formed by reflection are staggered from those on other longitudinal optical paths. Therefore, the reflected laser light from the second beam splitter on a given longitudinal optical path will not reach the second beam splitters on other longitudinal optical paths. Moreover, the number a of second beam splitters that can both reflect and transmit laser light on the m-th longitudinal optical path is [not specified in the original text]. m Satisfy the following formula: a m =nm, where 1≤m≤n, n≥2, such that the total number of first and second beam splitters that each laser beam output to the aperture passes through is n, and the first and second beam splitters have the same reflectivity and transmittance, thus ensuring that the laser energy output to the aperture is the same and the spot shape and size are the same, which meets the processing requirements. [Attached Image Description]

[0012] Figure 1 This is a state diagram of the first embodiment of the laser of the present invention that can output multiple lasers with the same energy and the same spot size;

[0013] Figure 2 This is a state diagram of the second embodiment of the laser of the present invention, which can output multiple lasers with the same energy and the same spot size.

Detailed Implementation Methods

[0014] The present invention will now be further described with reference to the accompanying drawings:

[0015] like Figure 1As shown, the present invention provides a laser capable of outputting multiple beams of the same energy and the same spot size, including a laser generating device 1 capable of emitting laser light outwards, a beam expander 2 provided on the path of the laser light emitted outwards from the laser generating device 1, the laser light passing through the beam expander 2 to form a transverse optical path 3 emitted along the X-axis, n first beam splitters 4 that can both reflect and transmit laser light are provided at intervals on the transverse optical path 3, the laser light is reflected at each of the first beam splitters 4 to form n longitudinal optical paths 5 emitted along the Y-axis, the number am of second beam splitters 6 that can both reflect and transmit laser light set on the m-th longitudinal optical path 5 satisfies the following formula: am = nm, where 1 ≤ m ≤ n, n ≥ 2, the first beam splitters 4 and the second beam splitters 6 have the same reflectivity and transmittance, and the second beam splitters 6 on each longitudinal optical path 5 are staggered from the second beam splitters 6 on other longitudinal optical paths 5, the laser also includes aperture stops 7 of the same aperture set at intervals at the output end of each longitudinal optical path 5.

[0016] In use, the laser generator 1 is first activated, emitting a laser beam. This laser beam passes through the beam expander 2, forming a transverse optical path 3. First beam splitters 4, spaced apart on the transverse optical path 3, divide it into multiple longitudinal optical paths 5. Second beam splitters 6 are positioned on each longitudinal optical path 5 to transmit and reflect the light. Furthermore, the second beam splitters 6 on each longitudinal optical path 5 are staggered from those on other longitudinal optical paths 5. Therefore, the reflected laser light from the second beam splitter 6 on one longitudinal optical path 5 will not reach the second beam splitters 6 on other longitudinal optical paths 5, avoiding unnecessary re-reflection. Moreover, the number a of the second beam splitters 6 that can both reflect and transmit laser light on the m-th longitudinal optical path 5 is specified. m Satisfy the following formula: a m =nm, where 1≤m≤n, n≥2, such that the total number of first beam splitters 4 and second beam splitters 6 that each laser beam output to the aperture 7 passes through is n, and the first beam splitter 4 and the second beam splitter 6 have the same reflectivity and transmittance, thereby making the laser output to the aperture 7 have the same energy and the same spot size and shape.

[0017] The aperture 7 is an adjustable aperture. The aperture 7 is circular, and its radius is r.

[0018] In one embodiment, the number of first beam splitters 4 is 3, the number of second beam splitters 6 on the first longitudinal optical path 5 is 2 (a1), the number of second beam splitters 6 on the second longitudinal optical path 5 is 1 (a2), and the number of second beam splitters 6 on the third longitudinal optical path 5 is 0 (a3). From the perspective of the longitudinal and transverse optical paths, the laser output from the first longitudinal optical path 5 passes through one first beam splitter 4 and two second beam splitters 6; the laser output from the second longitudinal optical path 5 passes through two first beam splitters 4 and one second beam splitter 6; and the laser output from the third longitudinal optical path 5 passes through three first beam splitters 4. Since the reflectivity and transmittance of the first beam splitters 4 and second beam splitters 6 are the same, and the aperture size of the aperture 7 is the same, the total number of first beam splitters 4 and second beam splitters 6 passed through by the laser output from each longitudinal optical path is 3. Therefore, the energy of the laser output from each longitudinal optical path is the same, and the size and shape of the light spot are also the same.

[0019] The reflectivity of the first beam splitter 4 and the second beam splitter 6 is R%, and the transmittance of the first beam splitter 4 and the second beam splitter 6 is 1-R%. The first beam splitter 4 and the second beam splitter 6 can be replaced as needed to obtain the laser with the required energy.

[0020] In this embodiment, the first beam splitter 4 and the second beam splitter 6 are beam splitters with 8% reflectivity and 92% transmittance.

[0021] This embodiment allows for the calculation of energy using a formula. The laser energy emitted by laser generator 1 is bmJ, the length of the laser spot is cmm, and the width is dmm. After passing through beam expander 2, the laser spot expands by a factor of f. The formula for calculating laser energy is b*cf*df*R%*1-R%*n-1*3.14*r 2 .

[0022] This embodiment provides an example where the laser light generating device 1 emits a laser with an energy of 30 mJ. The laser spot has a length of 10 mm and a width of 5 mm. After the laser passes through the beam expander 2 and is expanded by 5 times, a new spot with a length of 50 mm and a width of 25 mm is obtained. The reflectivity of the first beam splitter 4 and the second beam splitter 6 is 8%, and the radius r of the aperture is 5 mm. Therefore, the laser energy after exiting the aperture is 30 mJ / 50 mm / 25 mm * 8% * 92% * 92% * 3.14 * 5 * 5 = 0.127 mJ.

[0023] like Figure 2As shown, this embodiment also provides another example, in which the number of the first beam splitter 4 is 4, the number of the second beam splitter 6 on the first longitudinal optical path 5 is 3 (a1), the number of the second beam splitter 6 on the second longitudinal optical path 5 is 2 (a2), the number of the second beam splitter 6 on the third longitudinal optical path 5 is 1 (a3), and the number of the second beam splitter 6 on the fourth longitudinal optical path 5 is 0 (a4). From the perspective of the longitudinal and transverse optical paths, the laser output from the first longitudinal optical path 5 passes through one first beam splitter 4 and three second beam splitters 6; the laser output from the second longitudinal optical path 5 passes through two first beam splitters 4 and two second beam splitters 6; the laser output from the third longitudinal optical path 5 passes through three first beam splitters 4 and one second beam splitter 6; and the laser output from the fourth longitudinal optical path 5 passes through four first beam splitters 4. Since the reflectivity and transmittance of the first beam splitters 4 and the second beam splitters 6 are the same, the total number of first beam splitters 4 and second beam splitters 6 passed by each longitudinal optical path output is four. Therefore, the energy of the laser output from each longitudinal optical path is the same. Moreover, since the aperture of the aperture 7 is the same, the shape and size of the output laser spot are also the same, thus meeting the needs of specific processing applications. The laser light generating device 1 emits a laser with an energy of 30mJ. The length of the laser spot is 10mm and the width is 5mm. After the laser passes through the beam expander 2 and is expanded by 5 times, a new spot with a length of 50mm and a width of 25mm is obtained. The reflectivity of the first beam splitter 4 and the second beam splitter 6 is 8%, and the radius r of the aperture is 5mm. Therefore, the laser energy after exiting the aperture is 30mJ / 50mm / 25mm*8%*92%*92%*92%*3.14*5*5=0.117mJ.

Claims

1. A laser capable of outputting multiple beams of the same energy and the same spot size, characterized in that: The system includes a laser generator (1) capable of emitting laser light outwards. A beam expander (2) is provided along the path of the laser light emitted from the laser generator (1). After passing through the beam expander (2), the laser light forms a transverse optical path (3) emitted along the X-axis. The transverse optical path (3) is provided with n first beam splitters (4) that can both reflect and transmit laser light at intervals. The laser light is reflected at each of the first beam splitters (4) to form n longitudinal optical paths (5) emitted along the Y-axis. The number a of the second beam splitters (6) that can both reflect and transmit laser light set on the m-th longitudinal optical path (5) is... m Satisfy the following formula: a m =nm, where 1≤m≤n, n≥2, the first beam splitter (4) and the second beam splitter (6) have the same reflectivity and transmittance, and the second beam splitter (6) on each longitudinal optical path (5) is staggered from the second beam splitter (6) on other longitudinal optical paths (5). The laser also includes an aperture (7) spaced at the output end of each longitudinal optical path (5). The first beam splitter (4) and the second beam splitter (6) are beam splitters with 8% reflectivity and 92% transmittance.

2. The laser capable of outputting multiple beams of the same energy and the same spot size according to claim 1, characterized in that: The number of the first beam splitter (4) is 3, the number of the second beam splitter (6) on the first longitudinal optical path (5) is 2 (a1), the number of the second beam splitter (6) on the second longitudinal optical path (5) is 1 (a2), and the number of the second beam splitter (6) on the third longitudinal optical path (5) is 0 (a3).

3. The laser capable of outputting multiple beams of the same energy and the same spot size according to claim 1, characterized in that: The aperture (7) mentioned above is an adjustable aperture.

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