A high lumen laser searchlight path structure

Abstract

The invention discloses a high-lumen laser searchlight path structure, comprising a laser diode bank (1), a collimating reflector assembly (2), a combination and reflection assembly (3), a converging assembly (4), a combined lens (5), and a light-emitting lens (6); the laser light emitted by the laser diode bank (1) is longitudinally compressed and secondary collimated by the collimating reflector assembly (2), and then the light beam is transversely compressed by the combination and reflection assembly (3); the light beam is converged by the converging assembly (4), and the converged point light source is expanded and collimated by the combination lens (5) and the light-emitting lens (6) before being emitted. The light beam emitted from the laser diode bank is transversely and longitudinally compressed by the collimating reflector assembly and the combination and reflection assembly, and the compressed light beam is converged into a point light source by the converging assembly, and the point light source is expanded and collimated by the combination lens and the light-emitting lens, thereby obtaining a long-distance high-lumen laser searchlight.

Description

Technical Field

[0001] The invention belongs to the technical field of lighting, and in particular relates to special lighting using laser lighting, and specifically is a high-lumen laser searchlight path structure. Background Art

[0002] At present, from the initial incandescent lamps and energy-saving lamps as lighting sources, to the later LED type light sources becoming the mainstream lighting source, but whether it is incandescent lamps, energy-saving lamps or LED light sources, in some special application fields that require high-brightness light sources, such as projection display, stage lighting and other fields, LEDs cannot meet the requirements. Semiconductor laser diodes, which are homologous to LEDs, have the advantages of high efficiency, energy saving, environmental protection, and long life. Using the collimated coupling and convergence technology of semiconductor laser diodes, ultra-high brightness point light sources can be obtained, which can be used in special lighting fields such as laser searchlights.

[0003] Laser light sources can be made into ultra-high brightness point light sources through the technology of collimation coupling and convergence. Using this point light source, a laser searchlight with a very small beam divergence angle can be designed. The beam divergence angle of a laser searchlight is generally within 0.7°, so it can form an irradiation distance of several kilometers. Summary of the invention

[0004] The purpose of the present invention is to design a laser light path structure with a very small light beam divergence angle, which can be applied to a laser searchlight.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] A high-lumen laser searchlight path structure comprises a laser diode bank, a collimating reflection component, a combined reflection component, a converging component, a combined lens, and a light-emitting lens.

[0007] The laser light emitted by the laser diode bank is longitudinally compressed and secondary collimated by the collimating reflection component, and then the light beam is transversely compressed by the combining reflection component; the light beam is converged by the converging component, and the converged point light source is expanded and collimated by the combining lens and the light output lens before being emitted.

[0008] During operation, the laser emitted from the laser diode bank first passes through the collimating reflector component to compress the laser longitudinally and perform secondary collimation correction. The laser after longitudinal compression and stacking enters the combining reflector component to compress the laser transversely. The compressed laser enters the light incident surface of the converging component to converge to form a point light source. The converged point light source passes through the combined lens to the light output lens for beam expansion and collimation, thus obtaining a laser searchlight light source with a small divergence angle and large luminous flux for long-distance irradiation.

[0009] The invention has reasonable design and good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram showing the laser searchlight path structure of the present invention.

[0011] Figure 2 Axis schematic diagram showing the light source section.

[0012] Figure 3 Figure 2 shows a schematic diagram of a laser diode bank.

[0013] Figure 4 Schematic diagram of the collimated reflector assembly.

[0014] Figure 5 Represents a schematic diagram of the combined and reverse components.

[0015] Figure 6 Represents a schematic diagram of the aggregation components.

[0016] Figure 7 Schematic diagram of the optical path of the combined lens and the light output lens.

[0017] In the figure: 1-laser diode bank, 11-heat sink, 101-blue light module, 102-green light module, 103-red light module; 2-collimating reflector assembly, 21-wavy reflector mounting bracket, 201-reflector; 3-combining and reflecting assembly, 301-polarizer, 302-first reflector, 303-second reflector, 304-PBS filter, 305-transparent blue-green-reflecting and red-combining mirror; 4-converging assembly, 401-convex lens group, 402-incident optical fiber; 5-combined lens, 501-convex lens, 502-double lens, 503-double concave lens; 6-light output lens. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] A high lumen laser searchlight path structure, such as Figure 1 As shown, it includes a laser diode bank 1, a collimating reflection component 2, a combining reflection component 3, a converging component 4, a combining lens 5, and a light output lens 6.

[0020] The laser light emitted by the laser diode bank 1 is longitudinally compressed and secondary collimated by the collimating reflector component 2, and then the light beam is transversely compressed by the combining reflector component 3; the light beam is converged by the converging component 4, and the converged point light source is expanded and collimated by the combining lens 5 and the light-emitting lens 6 before being emitted.

[0021] The specific operation is as follows: a plurality of collimated laser beams emitted from the laser diode bank 1 are used as incident laser beams, which are spatially stacked and 90° reversed through the collimating reflector assembly 2. Each reflector 201 in the collimating reflector assembly 2 can integrate and adjust a single laser diode LD, and adjust each laser beam to be parallel and enter the combining and anti-combining assembly 3. The combining and anti-combining assembly 3 is composed of a reflector and a beam combining mirror combination. The combining and anti-combining assembly has the function of compressing a wide-distance beam into a parallel short-distance beam, and its function is to compress the interface size of the collimated laser beam to a size suitable for entering the converging assembly 4. The converging assembly 4 has the function of converging the compressed parallel beam into a point light source, and its function is to converge the laser beam into a point light source suitable for a searchlight. The beam formed by the point light source enters the combining lens 5, and the combining lens 5 has the function of homogenizing light and changing the divergence angle, and its function is to restore the point light source to a uniform beam with a fixed divergence angle. Finally, the beam is emitted through the light-emitting lens 6 as a high-lumen laser beam.

[0022] In this embodiment, Figure 3 As shown, the laser diode bank 1 includes a heat sink 11, on which a blue light module 101, a green light module 102 and a red light module 103 are arranged. The red light module 103 is three 4×4 red laser diode arrays, which are sequentially distributed on one side of the heat sink 11, the green light module 102 is two 2×4 green laser diode arrays, and the blue light module 101 is a 2×4 blue laser diode array. The green light module 102 and the blue light module 101 are sequentially distributed on the other side of the heat sink 11; therefore: the blue light module 101, the green light module 102 and the red light module 103 together constitute a 6×12 laser diode array, and the module combination can be adjusted to output various colors of light, and the maximum light output of the module combination is 12000lm.

[0023] In this embodiment, Figure 2 , 4 As shown, the collimating reflection component 2 is located directly above the laser diode bank 1, and the collimating reflection component 2 includes a wavy reflection mirror mounting frame 21, on which a reflection mirror 201 is mounted above each laser diode at a 45° tilt direction. The reflection mirror 201 in the collimating reflection component 2 is tilted 45° to the laser diode bank 1, and the beam of the laser diode bank 1 is longitudinally spatially compressed with a compression ratio of 5:1. The reflected light path is collimated twice to reduce the energy loss of the laser light and improve the utilization efficiency of the light energy.

[0024] In this embodiment, Figure 5As shown, the combining and reflecting component 3 includes a polarizer 301, a first reflector 302, a second reflector 303, a PBS filter 304 and a blue-green-reverse-red beam combining mirror 305; wherein the polarizer 301 is perpendicular to the direction of the incident red light, the PBS filter 304 is about 45° to the direction of the incident red light, the blue-green-reverse-red beam combining mirror 305 is about 45° to the direction of the incident blue-green light, the PBS filter 304 and the blue-green-reverse-red beam combining mirror 305 are located almost in the same plane, and the first reflector 302 and the second reflector 303 are arranged parallel to the PBS filter 304 and the blue-green-reverse-red beam combining mirror 305, respectively. In this way, the red light emitted from some columns (for example, the two columns on the side) in the red light module 103 is reflected by the respective reflectors 201 and then incident on the polarizer 301, and then sequentially reflects through the first reflector 302, the PBS filter 304, the second reflector 303 and the blue-green-reverse-red beam combiner 305 and then emerges; the red light emitted from another part of the columns (for example, the two columns in the middle) in the red light module 103 is reflected by the respective reflectors 201 and then incident on the PBS filter 304, and then sequentially reflects through the second reflector 303 and the blue-green-reverse-red beam combiner 305 and then emerges; first, the light emitted by the laser is linearly polarized light. The waveforms of linearly polarized light are perpendicular to each other, and can be respectively called P polarized light and S polarized light. The function of the polarizer is to convert P polarized light into S polarized light. The function of the PBS filter is to transmit P polarized light and reflect S polarized light. Therefore, one of the two red light beams changes the polarization direction of the waveform after passing through the polarizer. Then, through the characteristics of the PBS filter, the polarizer 301 and the PBS filter 304 can cooperate so that the red light passing through the polarizer 301 can be reflected by the PBS filter again. The blue light and green light emitted by the blue light module 101 and the green light module 102 are reflected by their respective reflectors 201 and then incident on the blue-green-reflecting-red beam combining mirror 305 and then emitted. A combining and reversing component 3 is set to compress the RGB light beam in the horizontal space with a compression ratio of 3:1, and compress the overall size of the light beam to a size that can enter the converging component 4. The laser is the RGB light source to synthesize white light.

[0025] In this embodiment, Figure 6 As shown, the convergence component 4 includes a convex lens group 401 and an incident optical fiber 402; the convex lens group 401 is generally composed of two convex lenses, 12 mm apart, and the optical fiber entrance of the incident optical fiber 402 is located at the focus of the rear convex lens (30 mm away). The outgoing light beam of the combining and reversing component 3 is converged by the convex lens group 401 and enters the incident optical fiber 402 before being emitted. The function of the convergence component 4 is to converge the laser beam into a point light source suitable for a searchlight.

[0026] In this example, in order to obtain a long-distance illumination beam with a divergence angle less than 1°, the mixed point light source needs to be further expanded and collimated, such as Figure 7As shown, the combined lens 5 is a combination of three lenses, including a convex lens 501 (φ48mm), a double lens 502 (φ54mm) and a double concave lens 503 (φ54mm). The double lens 502 and the double concave lens 503 are glued together as a whole. The focal length of the convex lens 501 is 24mm; the convex lens 501 is 27mm away from the double lens 502 and the double concave lens 503 as a whole. This arrangement makes their focal points coincide or close, and the light beam is expanded and collimated through the lens assembly 5 to form a long-distance lighting beam with a divergence angle less than 1°.

[0027] like Figure 7 As shown, the distance between the biconcave lens 503 and the light-emitting lens 6 is 95 mm. The outgoing light beam of the converging component 4 is expanded and collimated after passing through the convex lens 501, the double lens 502 and the biconcave lens 503 in sequence to form a long-distance illumination light beam with a divergence angle less than 1°, and finally exits through the light-emitting lens 6.

[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A high lumen laser searchlight path structure, characterized in that: It comprises a laser diode bank (1), a collimating reflection component (2), a combining reflection component (3), a converging component (4), a combining lens (5), and a light output lens (6); The laser light emitted by the laser diode bank (1) is longitudinally compressed and secondary collimated by the collimating reflection component (2), and then the light beam is transversely compressed by the combining reflection component (3); the light beam is converged by the converging component (4), and the converged point light source is expanded and collimated by the combining lens (5) and the light output lens (6) before being emitted; The laser diode bank (1) comprises a heat dissipation base (11), on which a blue light module (101), a green light module (102) and a red light module (103) are arranged, the red light module (103) being three 4×4 red light laser diode arrays and being sequentially distributed on one side of the heat dissipation base (11), the green light module (102) being two 2×4 green light laser diode arrays, the blue light module (101) being a 2×4 blue light laser diode array, and the green light module (102) and the blue light module (101) being sequentially distributed on the other side of the heat dissipation base (11); then: the blue light module (101), the green light module (102) and the red light module (103) together constitute a 6×12 laser diode array; The collimating reflective assembly (2) is located directly above the laser diode bank (1), and the collimating reflective assembly (2) comprises a wavy reflective mirror mounting frame (21), and a reflective mirror (201) is mounted on the wavy reflective mirror mounting frame (21) above each laser diode at a 45° tilt direction. The combining and reflecting component (3) comprises a polarizing plate (301), a first reflecting mirror (302), a second reflecting mirror (303), a PBS filter (304) and a blue-green-reflecting and red-reflecting combining mirror (305); red light emitted by a portion of the columns in the red light module (103) is reflected by the respective reflecting mirrors (201) and then incident on the polarizing plate (301), and then passes through the first reflecting mirror (302), the PBS filter (304), the second reflecting mirror (303) and the blue-green-reflecting and red-reflecting combining mirror (305) in sequence. The red light emitted by the other part of the red light module (103) is reflected by the respective reflectors (201) and then incident on the PBS filter (304), and then sequentially reflected by the second reflector (303) and the blue-green-reverse-red beam combining mirror (305) and then emitted; the blue light and green light emitted by the blue light module (101) and the green light module (102) are reflected by their respective reflectors (201) and then incident on the blue-green-reverse-red beam combining mirror (305) and then emitted; The combined lens (5) is a combination of three lenses, including a convex lens (501), a double lens (502) and a double concave lens (503), wherein the double lens (502) and the double concave lens (503) are glued together to form a whole; The outgoing light beam of the converging component (4) passes through a convex lens (501), a double lens (502) and a double concave lens (503) in sequence, and then is expanded and collimated to form a long-distance illumination light beam with a divergence angle less than 1°, and finally is emitted through a light output lens (6); The collimating reflective component (2) performs longitudinal spatial compression on the light beam emitted from the laser diode bank (1), with a compression ratio of 5:

1.

2. A high lumen laser searchlight path structure according to claim 1, characterized in that: The converging component (4) comprises a convex lens group (401) and an incident optical fiber (402); the outgoing light beam of the combining and reflecting component (3) is converged by the convex lens group (401), enters the incident optical fiber (402), and then emerges.

3. The high lumen laser searchlight path structure according to claim 2 is characterized in that: The combining and reflecting component (3) compresses the RGB light beam in the transverse space, with a compression ratio of 3:1, and compresses the overall size of the light beam to the size entering the converging component (4).

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