CN-117215077-B - Light-condensing module and laser optical system

Abstract

The invention discloses a condensing module and a laser optical system, wherein the condensing module is used for gathering and/or focusing excitation light to a wavelength conversion device, the light beam quality product of the excitation light in the x-axis direction is larger than the light beam quality product in the y-axis direction, the condensing module comprises a module support, a condensing support and a condensing lens group, the condensing lens group comprises a first lens with negative diopter, a second lens with positive diopter and a third lens with positive diopter, which are sequentially arranged, the module support is provided with a first installation cavity, the first lens is arranged in the first installation cavity, the condensing support is provided with a second installation cavity, and the third lens is arranged in the second installation cavity. The light condensing module can efficiently shape and focus asymmetric excitation light, and has simple and compact structure and excellent light condensing effect.

Inventors

• WANG YUAN
• CHEN GUOPING

Assignees

• 广州光联电子科技有限公司

Dates

Publication Date

20260505

Application Date

20220721

Priority Date

20220602

Claims (11)

1. 1. The utility model provides a spotlight module for draw in and/or focus excitation light to wavelength conversion device, the light beam quality product of excitation light in the x-axis direction is greater than the light beam quality product in the y-axis direction, its characterized in that, spotlight module includes module support, spotlight support and spotlight lens group, spotlight lens group includes the first lens that sets gradually has negative diopter, has positive diopter second lens and has positive diopter third lens, the module support is equipped with first installation cavity, first lens set up in first installation cavity, spotlight support is equipped with the second installation cavity, third lens set up in the second installation cavity, spotlight lens group's combined focal length in the x-axis direction is f1x, spotlight lens group's combined focal length in the y-axis direction is f1y, the distance of the income plain noodles of first lens to wavelength conversion device's excited face is L1, f1x, fly satisfies 0.7/1/1.4 < 1/1.1 < 1/1.
2. 2. The light focusing module of claim 1, wherein a first step is arranged in the first mounting cavity, the first lens is arranged on the first step, a second step is arranged in the second mounting cavity, the third lens is arranged on the second step, and the second lens and the third lens group are arranged at intervals through a lens compression ring.
3. 3. The light focusing module of claim 2, wherein the first mounting cavity is further provided with a plurality of mounting grooves, a plurality of silica gel spacing columns are arranged in the mounting grooves, and the silica gel spacing columns are positioned between the first lens and the second lens.
4. 4. The light focusing module of claim 1, wherein a third step is further arranged in the light focusing bracket, and a light homogenizing diffusion sheet is arranged on the third step.
5. 5. The light focusing module as claimed in claim 1, wherein the module support is provided with a positioning column or a positioning hole, and the light focusing support is provided with a positioning hole matched with the positioning column of the module support or a positioning column matched with the positioning hole of the module support.
6. 6. The laser optical system is characterized by comprising a laser light source for emitting excitation light, a light condensing module set according to any one of claims 1 to 5, a wavelength conversion device for converting the excitation light into illumination light, a collimation module set for collimating the illumination light and a light emitting lens set for emitting the illumination light, wherein the light condensing module set, the collimation module set and the light emitting lens set are coaxially arranged in sequence, and the ratio of the light beam quality product of the excitation light in the x-axis to the light beam quality product in the y-axis is 1.1-2.
7. 7. The laser optical system according to claim 6, wherein the collimating module comprises a collimating bracket and a collimating lens group arranged on the collimating bracket, the collimating lens group comprises a fourth lens with positive diopter and a fifth lens with positive diopter, the effective clear aperture of the fourth lens is D4, the gap spacing between the fourth lens and the wavelength conversion device is L21, and the D4 and L21 satisfy 13< D4/L21<17.
8. 8. The laser optical system according to claim 7, wherein the collimating bracket is provided with an annular third mounting cavity, a chamfer is arranged in the third mounting cavity, a plurality of dispensing grooves are arranged on the chamfer, the fourth lens is installed in the third mounting cavity in a guiding manner through the chamfer and in a dispensing manner, and/or a fourth step is arranged on the collimating bracket, and the fifth lens is arranged on the fourth step.
9. 9. The laser optical system according to claim 7, wherein at least 2 support handles are provided on the collimating bracket, a guide mounting groove for guiding and mounting the support handles is provided on a side wall of the condensing bracket, or at least 2 support handles are provided on the condensing bracket, a guide mounting groove for guiding and mounting the support handles is provided on a side wall of the collimating bracket, and the collimating bracket and the condensing bracket are connected through the support handles.
10. 10. The laser optical system according to claim 7, wherein the combined focal length of the collimator lens group is f2, the farthest distance from the excitation surface of the wavelength conversion device to the light exit surface of the fifth lens is L2, and L2 and f2 satisfy 0.42< f2/L2<0.65.
11. 11. The laser optical system of claim 6, wherein the wavelength conversion device comprises a sapphire fluorescent disk, a brushless motor for driving the sapphire fluorescent disk to rotate, and a metal ring plate disposed on the sapphire fluorescent disk for maintaining dynamic balance.

Description

Light-condensing module and laser optical system Technical Field The invention relates to the technical field of lasers, in particular to a light-condensing module and a laser optical system. Background At present, a plurality of lasers are spliced into an array structure in a high-power laser module on the market, however, the quality product of light beams of the laser array in the x y direction is usually asymmetric, so that emitted laser is uneven in the xy direction, and light spots are in elliptical shapes, so that the excitation efficiency of the laser to the wavelength conversion device is affected. In addition, for the laser light source system, miniaturization, portability, and simplification of the processing process are being sought in the mainstream trend nowadays. Therefore, it is a problem that the skilled person is striving to solve how to reduce the size of the optical system and simplify the mounting process while ensuring excellent optical effects of the laser optical system and to improve the mass production stability. Disclosure of Invention The invention aims to overcome at least one defect of the prior art, and provides a light condensing module which can efficiently shape and focus asymmetric excitation light, has a simple and compact structure and has an excellent light condensing effect. Another object of the present invention is to provide a laser optical system having high light receiving efficiency and excellent optical performance. The technical scheme adopted by the invention is as follows: The utility model provides a spotlight module for draw in and/or focus excitation light to wavelength conversion device, the light beam quality product of excitation light in the x-axis direction is greater than the light beam quality in the y-axis direction, spotlight module includes module support, spotlight support and spotlight lens group, spotlight lens group includes the first lens that has negative diopter, the second lens that has positive diopter and the third lens that has positive diopter that set gradually, the module support is equipped with first installation cavity, first lens set up in first installation cavity, spotlight support is equipped with the second installation cavity, the third lens set up in the second installation cavity, the combined focal length of spotlight lens group in the x-axis direction is f1x, the combined focal length of spotlight lens group in the y-axis direction is f1y, the distance of the income plain noodles of first lens to wavelength conversion device is L1, f1x, fly satisfies 0.7< 1/1.4 < 1.1/1 < 1/1.7 <1. In one embodiment, a first step is arranged in the first mounting cavity, the first lens is arranged on the first step, a second step is arranged in the second mounting cavity, the third lens is arranged on the second step, and the second lens and the third lens group are arranged at intervals through a lens compression ring. In one embodiment, the first mounting cavity is further provided with a plurality of mounting grooves, the plurality of silica gel spacing columns are arranged in the mounting grooves, and the silica gel spacing columns are located between the first lens and the second lens. In one embodiment, a third step is further arranged in the light focusing bracket, and a light homogenizing diffusion sheet is arranged on the third step. In one embodiment, the module support is provided with a positioning column or a positioning hole, and the light-focusing support is provided with a positioning hole matched with the positioning column of the module support or a positioning column matched with the positioning hole of the module support. The utility model provides a laser optical system, includes the laser light source that sends the excitation light, spotlight module, be used for converting the excitation light into the wavelength conversion device of illumination light, be used for collimating the collimation module of illumination light and be used for the play optical lens group of outgoing illumination light, spotlight module, collimation module, play optical lens group coaxial arrangement in proper order, the light beam quality product ratio of excitation light on the x-axis with the light beam quality product on the y-axis is 1.1-2. In one embodiment, the collimating module comprises a collimating bracket and a collimating lens group arranged on the collimating bracket, the collimating lens group comprises a fourth lens with positive diopter and a fifth lens with positive diopter, the effective clear aperture of the fourth lens is D4, the gap spacing between the fourth lens and the wavelength conversion device is L21, and the D4 and L21 meet the conditions that 13< D4/L21<17. In one embodiment, the collimating bracket is provided with an annular third mounting cavity, a chamfer is arranged in the third mounting cavity, a plurality of glue dispensing grooves are formed in the chamfer, the fourth lens is installed in the third m