CN218441864U - Reflective high-power laser lighting module - Google Patents
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- CN218441864U CN218441864U CN202222808892.0U CN202222808892U CN218441864U CN 218441864 U CN218441864 U CN 218441864U CN 202222808892 U CN202222808892 U CN 202222808892U CN 218441864 U CN218441864 U CN 218441864U
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Abstract
The utility model aims at providing a high-power laser lighting module of reflection-type contains the laser source who is used for launching laser beam, still contains and is arranged in laser emission's light path, a dichroic mirror for dividing into light beam A and light beam B with laser beam, a scattering device for scattering into light beam A' and reflecting light beam A 'back to the dichroic mirror, through changing light beam B's colour obtains light beam B 'and reflects light beam B' back to the wavelength conversion device of dichroic mirror, be equipped with the reflection stratum that is used for the reflected light beam B 'on the incident plane of the relative light beam B' of dichroic mirror; and the light beam A 'is transmitted through the dichroic mirror and then integrated with the light beam B' to obtain a white illumination light beam. The laser lighting module can provide a chromatic aberration-free lighting source by using the laser light source, has a good lighting effect and reduces the occupied space.
Description
Technical Field
The utility model relates to a laser lighting technology field, concretely relates to high-power laser lighting module of reflective.
Background
In the existing high-power lighting system, most light sources adopt LEDs, a single LED cannot realize the light output of hundred watt-level power, a plurality of LED light sources are needed for realization, and the defect of high cost exists. Laser lighting is a novel lighting technology using laser or laser diode as light emitting source, the laser has the advantages of good monochromaticity, high energy concentration, high brightness and the like, and a single laser light source can meet the requirement of high-power light output.
Chinese patent publication No. CN210573158U discloses a laser light source system, a projector, and an illumination apparatus. The laser light source system includes: a laser light source for emitting excitation light; a rotating color wheel for dividing the excitation light into a first excitation light and a second excitation light; the light recovery device is used for recovering the second exciting light generated by the rotating color wheel; the wavelength conversion device is used for receiving the first exciting light so that the first exciting light excites the wavelength conversion material to generate excited light; the first dichroic mirror is used for transmitting exciting light, reflecting stimulated laser or reflecting exciting light and transmitting stimulated laser; the first dichroic mirror enables the received laser and second excitation light which is recycled by the light recycling device and then enters the first dichroic mirror to be combined, and therefore the lighting source is obtained. However, the following technical defects exist: the lighting source has color difference, non-uniform color, poor lighting effect and more occupied space of the structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-power laser lighting module of reflective, this laser lighting module can utilize laser source to provide the illuminating light source of no colour difference, and the illuminating effect is good and has reduced the space that occupies.
The above technical purpose of the utility model is realized through following technical scheme:
a reflection type high-power laser lighting module comprises a laser light source used for emitting laser beams, a dichroic mirror located in a light path emitted by laser and used for dividing the laser beams into beams A and B, a scattering device used for scattering the beams A into beams A 'and reflecting the beams A' back to the dichroic mirror, and a wavelength conversion device used for obtaining the beams B 'by changing the color of the beams B and reflecting the beams B' back to the dichroic mirror, wherein a reflection layer used for reflecting the beams B 'is arranged on an incident surface of the dichroic mirror opposite to the beams B'; and the light beam A 'is integrated with the light beam B' after transmitting through the dichroic mirror to obtain an illumination light beam.
Thus, as known in the art, the laser light is monochromatic light, such as red and blue laser light. To achieve the illumination effect, it needs to be processed to obtain a light beam with a color suitable for illumination. The specific operation is as follows: the laser light source firstly emits laser beams, the dichroic mirror is arranged on a projection light path of the laser beams, the laser beams can reflect part of laser according to the characteristics of the dichroic mirror after being projected to the dichroic mirror, and the reflected laser beams are collectively called as beams A; the dichroic mirror is also capable of transmitting a portion of the laser light, and the portion of the laser light transmitted through the dichroic mirror becomes beam B. As can be seen from the characteristics of the dichroic mirror in the prior art, the number of transmitted light beams B is greater than the number of reflected light beams a.
After the laser beam is divided into a beam A and a beam B, the beam A is reflected to a scattering device, and the scattering device performs scattering and dodging treatment on the beam A to obtain a more divergent beam A' with a larger emergent radius. The scattering device scatters the light beam A to obtain a light beam A 'and reflects the light beam A' to project the light beam A 'to the dichroic mirror, and most of the light beam A' can be transmitted out of the dichroic mirror according to the characteristics of the dichroic mirror. The scattering device can be made of common non-mirror materials, polarization materials and other materials.
The light beam B passes through the dichroic mirror and then is transmitted to the wavelength conversion device, and the wavelength conversion device is used for changing the color of the light beam B and can be a fluorescent color wheel or a structure with a fluorescent material in the prior art. The light beam B irradiates the wavelength conversion device to obtain laser with different colors, namely, the light beam B ' is generated and simultaneously reflected to the dichroic mirror by the wavelength conversion device, a reflection layer for reflecting the light beam B ' is arranged on the incident surface of the dichroic mirror relative to the light beam B ', the light beam B ' is reflected by the reflection layer and then coincides with the path of the light beam A ', and the specific path can be adjusted by adjusting the placing angle and the position of each device.
Obtaining an illumination light source after the light beam A 'is superposed with the light beam B', wherein the principle of obtaining the illumination light source is as follows: after the laser with different colors of three primary colors of red, blue and green are superposed, white or nearly white laser can be obtained. Therefore, the light beam for illumination can be obtained by setting the color of the laser and the color of the laser changed by the wavelength conversion device, for example, the color of the laser light source can be blue, the color corresponding to the wavelength conversion device can be yellow, and the white or nearly white illumination light beam can be obtained by integrating the blue laser and the yellow laser.
In the present case, only used laser source, dichroic mirror, scattering device, wavelength conversion device just can obtain the lighting source of high strength, simple structure is compact, and occupation space is little, saves the volume convenient to use. In addition, since the laser beam is split into the beams a and B after passing through the dichroic mirror, the number of the beams a is smaller than that of the beams B, and thus the number of the beams a is also smaller than that of the beams B'. If the beam a is directly integrated with the beam B 'without performing the scattering process, there is a limit in the projection range due to the small number of the beams a, and then a part of the beam B' cannot be integrated. The beam B' that is not integrated is still a monochromatic laser, resulting in the resulting illumination beam being: the part of the illumination light is close to white after the light beam A ' and the light beam B ' are integrated, and the part of the illumination light is monochromatic light formed by the light beam B ', and the illumination light beam has obvious chromatic aberration and poor illumination effect. In the scheme, the light scattering device for scattering and homogenizing the light beam A is arranged, the light beam A is scattered to obtain a more divergent light beam A ' with more range number, and the light beam A ' can be completely integrated with the light beam B ', so that the single-color illumination light is obtained, no chromatic aberration occurs, and the illumination effect is good.
As the utility model discloses a preferred, laser light source with be equipped with between the dichroic mirror and be used for assembling laser beam, make laser beam concentrate and project the beam shaping device of dichroic mirror.
Therefore, the light beam emitted by the laser light source is not concentrated in divergence, and needs to be converged and shaped, so that the divergence angle is reduced, and the laser light beam needs to be projected onto the dichroic mirror as much as possible. The light beam shaping device can be a focusing lens of a plano-convex lens, a biconvex lens and the like, the divergence angle of the light source light beams after focusing and converging is reduced, and the quantity of the light beams projected onto the dichroic mirror is increased.
As a preferred choice, the beam shaping device contains convergent lens and collimating lens according to the setting of laser outgoing light path in proper order.
Therefore, the beam shaping device comprises a converging lens and a collimating lens which are sequentially arranged according to the laser emergent light path. The converging lens is used for converging the light beams, reducing the divergence angle of the light beams, enabling the light beams as much as possible to be projected to the dichroic mirror and also focusing the light beams, so that the energy of the light beams is more concentrated and the illumination intensity is higher. The collimating lens is used for reducing the divergence angle of each light source, so that each light becomes collimated parallel light, and the transmission of the light is facilitated. The converging lens and the collimating lens are both arranged along the center of the light path, the spherical surface of the converging lens faces the laser light source, and the plane of the converging lens faces the collimating lens.
Preferably, a first focusing device for focusing the light beam a to project the light beam a to the scattering device is arranged between the dichroic mirror and the scattering device; the dichroic mirror and the wavelength conversion device are provided with a second focusing device for focusing the light beam B so as to project the light beam B onto the wavelength conversion device.
Therefore, the light beam a and the light beam B need to be projected to the scattering device and the wavelength conversion device, respectively, and since the receiving areas of the scattering device and the wavelength conversion device are limited, the light beam needs to be focused so that the light beam a and the light beam B are projected to the scattering device and the wavelength conversion device, respectively, as much as possible. In the present application, the light beam a and the light beam B are focused by the first focusing device and the second focusing device, which can be convex lenses of various types.
As the utility model discloses a preferred, first focusing device with second focusing device all contains along the plano-convex lens that light beam light path set up, two plano-convex lens's plane respectively moves towards scattering device with wavelength conversion device.
Thus, the first focusing device and the second focusing device both comprise plano-convex lenses arranged along the optical path, and the plano-convex lenses have a convex surface and a plane surface. The plane of the plano-convex lens faces the scattering device and the wavelength conversion device, so that the light beam A and the light beam B can be converged and focused and are intensively projected on the scattering device and the wavelength conversion device. After the light beam A 'and the light beam B' are emitted from the plane of the plano-convex lens, the light beams can be collimated, the point light source becomes parallel light, and the light transmission is facilitated, so that the plano-convex lens has two advantages.
Preferably, the first focusing device and the second focusing device each include two or more plano-convex lenses.
Thus, the two plano-convex lenses can increase the focusing and collimating effect of light.
As the utility model discloses a preferred, wavelength conversion device contains the fluorescence colour wheel and is used for driving fluorescence colour wheel pivoted brushless motor.
Therefore, the fluorescent color wheel is a device for changing the color of laser in the prior art, the surface of the fluorescent color wheel is provided with a fluorescent layer, a wavelength conversion layer and other structures, and after the laser irradiates the fluorescent color wheel, the color is changed and reflected. The brushless motor is used for driving the fluorescent color wheel to rotate, changing the irradiation area of the light beam B, and preventing the temperature of the area from rising and damaging the fluorescent color wheel because the light beam B irradiates the same area all the time.
Preferably, the present invention further includes an illumination beam shaping device for focusing and shaping the light beam a 'and the light beam B'.
Therefore, in order to obtain better illumination effect, an illumination light beam shaping device for focusing and shaping the light beams A 'and B' is arranged, and the illumination light beam shaping device can be convex lenses of various types.
As the utility model discloses a preferred, illumination beam shaping device contains two plano-convex lenses that set gradually according to light beam emergent light path.
Therefore, the plano-convex lens is only provided with one convex surface compared with the convex lens with two convex surfaces, and when the light source can be converged by one convex surface, the light beam cannot be converged into a high-intensity light spot in a concentrated manner, so that the local heat quantity is prevented. The two plano-convex lenses increase the convergence effect.
As the utility model discloses a preferred, laser light source is a plurality of laser diode that are array distribution.
Therefore, the laser light sources are a plurality of laser diodes distributed in an array mode, so that the illuminating light beams with high illumination intensity can be formed, and the illuminating effect is good.
To sum up, the embodiment of the utility model has following beneficial effect:
1. the high-intensity illumination light source can be obtained by using the laser light source, the dichroic mirror, the scattering device and the wavelength conversion device, the structure is simple and compact, the occupied space is small, the size is saved, and the use is convenient.
2. The scattering device for scattering and dodging the light beam A is arranged, the light beam A 'is scattered to obtain a more divergent light beam A' with more range number, and the light beam A 'can be completely integrated with the light beam B', so that almost single illumination light is obtained, the color difference of the illumination light is reduced, and the illumination effect is good.
3. The beam shaping device comprises a converging lens and a collimating lens which are sequentially arranged according to a laser emergent light path. The converging lens is used for converging the light beams, reducing the divergence angle of the light beams, enabling the light beams as many as possible to be projected onto the dichroic mirror and also focusing the light beams, so that the energy of the light beams is more concentrated and the illumination intensity is higher. The collimating lens is used for reducing the divergence angle of each light source, so that each light becomes collimated parallel light, and the transmission of the light is facilitated.
4. The first focusing device and the second focusing device respectively focus the light beam A and the light beam B, so that the light beam A and the light beam B respectively project to the scattering device and the wavelength conversion device as much as possible.
5. The first focusing device and the second focusing device both comprise plano-convex lenses arranged along the light path, and each plano-convex lens is provided with a convex surface and a plane. The plane of the plano-convex lens faces the scattering device and the wavelength conversion device, so that the light beam A and the light beam B can be converged and focused and are projected on the scattering device and the wavelength conversion device in a concentrated manner.
6. The brushless motor is used for driving the fluorescent color wheel to rotate, changing the irradiation area of the light beam B, and preventing the temperature of the area from rising and damaging the fluorescent color wheel because the light beam B irradiates the same area all the time.
Drawings
FIG. 1 is a schematic view of the present embodiment;
fig. 2 is a schematic view of a laser lighting module.
In the figure:
1. the device comprises a laser light source, 2, a dichroic mirror, 3, a scattering device, 4, a wavelength conversion device, 41, a fluorescent color wheel, 5, a beam shaping device, 51, a converging lens, 52, a collimating lens, 6, a first focusing device, 7, a second focusing device, 8 and a beam shaping device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Specifically, as known in the art, the laser is monochromatic light, such as red light and blue light. To achieve the illumination effect, it is necessary to process the light beam to obtain a white light beam or a light beam close to white, which has a color suitable for illumination. The specific operation is as follows:
the laser source 1 firstly emits a laser beam, the dichroic mirror 2 is arranged on a projection optical path of the laser beam, the laser beam can reflect part of laser according to the characteristics of the dichroic mirror 2 after being projected to the dichroic mirror 2, and the reflected laser beam is collectively called as a beam A; the dichroic mirror 2 is also capable of transmitting a portion of the laser light, and the portion of the laser light transmitted through the dichroic mirror 2 becomes beam B. As can be seen from the characteristics of the dichroic mirror 2 in the related art, the number of transmitted light beams B is greater than the number of reflected light beams a.
After the laser beam is divided into a beam A and a beam B, the beam A is reflected to the scattering device 3, and the scattering device 3 performs scattering and dodging processing on the beam A to obtain a more divergent beam A' with a larger emergent radius. The scattering device 3 scatters the light beam a to obtain a light beam a 'and reflects the light beam a' to project the light beam a 'to the dichroic mirror 2, and most of the light beam a' can be transmitted from the dichroic mirror 2 according to the characteristics of the dichroic mirror 2.
The light beam B, after passing through the dichroic mirror 2, is transmitted to the wavelength conversion device 4, which wavelength conversion device 3 is used to change the color of the light beam B. The light beam B irradiates the wavelength conversion device 4 to obtain laser beams with different colors, namely, the light beam B ' is generated and simultaneously reflected to the dichroic mirror 2 by the wavelength conversion device 4, a reflecting layer for reflecting the light beam B ' is arranged on the incident surface of the dichroic mirror 2 opposite to the light beam B ', the light beam B ' is reflected by the reflecting layer and then coincides with the path of the light beam A ', and the specific path can be adjusted by adjusting the arrangement angle and the position of each device.
After the light beam A 'is superposed with the light beam B', a white or near-white illumination light source is obtained, and the principle of obtaining the illumination light source is as follows: after the laser with different colors of three primary colors of red, blue and green are superposed, a nearly white laser beam can be obtained. Therefore, only by setting the color of the laser and the color of the laser changed by the wavelength conversion device 4, a nearly white illumination beam can be obtained, for example, in the embodiment, the color of the laser source 1 is blue, the color corresponding to the wavelength conversion device 4 can be yellow, and the nearly white illumination beam can be obtained by integrating the blue laser and the yellow laser. In order to obtain a white light beam having an accurate color, the white light beam can be corrected by applying a red or blue laser beam, and pure white light can be mixed.
Since the laser light beam is split into the light beams a and the light beams B after passing through the dichroic mirror 2, the number of the light beams a is smaller than that of the light beams B, and therefore the number of the light beams a is also smaller than that of the light beams B'. If the beam a is directly integrated with the beam B ', since the number of the beams a is small and the projection range is limited, it is necessary that a part of the beam B' cannot be integrated. The non-integrated beam B' is still a monochromatic laser, resulting in a resulting illumination beam: part of the monochromatic illumination light is white or close to white after the light beam A ' and the light beam B ' are integrated, and part of the monochromatic illumination light is formed by the light beam B ', so the illumination light beam has obvious chromatic aberration and poor illumination effect.
In order to solve the above problems, in this embodiment, the scattering device 3 is provided for scattering and homogenizing the light beam a, the light beam a is scattered to obtain a more divergent light beam a ' with a larger range number, and the light beam a ' can be completely integrated with the light beam B ', so that a single white or near-white illumination light is obtained, no color difference occurs, and the illumination effect is good. The scattering device 3 may be made of a common non-specular material, a polarization material, or the like.
In order to obtain better illumination effect, an illumination light beam shaping device 8 for focusing and shaping the light beam formed by integrating the light beam A 'and the light beam B' is arranged, and the illumination light beam shaping device 8 comprises two plano-convex lenses which are sequentially arranged according to the light beam emergent light path. Therefore, the plano-convex lens is only provided with one convex surface compared with the convex lens with two convex surfaces, and when the light source can be converged by one convex surface, the light beam cannot be converged into a high-intensity light spot in a concentrated manner, so that the local heat quantity is prevented. The two plano-convex lenses increase the converging effect.
Further, a beam shaping device 5 for converging the laser beam and projecting the laser beam onto the dichroic mirror 2 in a concentrated manner is provided between the laser light source 1 and the dichroic mirror 2. The light beam emitted by the laser light source 1 is required to be converged and shaped under the condition of non-concentrated divergence, so that the divergence angle is reduced, and the laser light beam is required to be projected onto the dichroic mirror 2 as much as possible.
The beam shaping device 5 includes a condensing lens 51 and a collimating lens 52 which are sequentially provided along the laser emission optical path. The converging lens 51 is used for converging light beams, reducing the divergence angle of the light beams, enabling as many light beams as possible to be projected onto the dichroic mirror 2, and also focusing the light beams, so that the energy of the light beams is more concentrated and the illumination intensity is higher. The collimating lens 52 is used to reduce the divergence angle of each light source so that each light becomes collimated parallel light, facilitating the transmission of the light. The converging lens 51 and the collimating lens 52 are both arranged along the center of the light path, the spherical surface of the converging lens 51 faces the laser light source, and the plane of the converging lens 51 faces the collimating lens 52.
A first focusing device 6 for focusing the light beam A to project the light beam A to the scattering device 3 is arranged between the dichroic mirror 2 and the scattering device 3; the dichroic mirror 2 and the wavelength conversion means 4 are provided with second focusing means 7 for focusing the light beam B such that it impinges on the wavelength conversion means 4. Thus, the light beams a and B need to be projected to the scattering device 3 and the wavelength conversion device 4, respectively, and since the receiving areas of the scattering device 3 and the wavelength conversion device 4 are limited, the light beams need to be focused so that as many light beams a and B as possible are projected to the scattering device 3 and the wavelength conversion device 4, respectively. In this embodiment. The light beams a and B are focused by first and second focusing means 6 and 7, respectively.
The first focusing device 6 and the second focusing device 7 each comprise a plano-convex lens disposed along the optical path of the light beam, the plano-convex lens having a convex surface and a flat surface. The plane of the plano-convex lens faces the scattering device 3 and the wavelength conversion device 4, so that the light beam a and the light beam B can be focused and projected on the scattering device 3 and the wavelength conversion device 4 in a concentrated manner. After the light beam A 'and the light beam B' are emitted from the plane of the plano-convex lens, the light beams can be collimated, and the point light source becomes parallel light, so that the light transmission is facilitated, and the plano-convex lens has two advantages.
In addition, the first focusing device 6 and the second focusing device 7 both comprise more than two plano-convex lenses, so that the focusing and collimating effects of light are enhanced.
The wavelength conversion device 4 includes a fluorescent color wheel 41 and a brushless motor for driving the fluorescent color wheel 41 to rotate. Therefore, the fluorescent color wheel is a device for changing the color of laser in the prior art, and the surface of the fluorescent color wheel is provided with a fluorescent layer, a wavelength conversion layer and other structures, so that after the laser irradiates the fluorescent color wheel 41, the color is changed and reflected. The brushless motor is used for driving the fluorescent color wheel 41 to rotate, changing the irradiation area of the light beam B, and preventing the temperature of the area from rising and damaging the fluorescent color wheel 41 because the light beam B is always irradiated on the same area.
In addition, the laser light source 1 is a plurality of laser diodes distributed in an array, so that an illumination beam with high illumination intensity can be formed, and the illumination effect is good.
Claims (10)
1. A reflective high-power laser lighting module comprises a laser light source (1) for emitting laser beams, and is characterized by further comprising a dichroic mirror (2) which is positioned in a laser emission light path and used for dividing the laser beams into light beams A and B, a scattering device (3) for scattering the light beams A into light beams A 'and reflecting the light beams A' back to the dichroic mirror (2), and a wavelength conversion device (4) for obtaining light beams B 'by changing the color of the light beams B and reflecting the light beams B' back to the dichroic mirror (2), wherein a reflecting layer for reflecting the light beams B 'is arranged on the incident surface of the dichroic mirror (2) opposite to the light beams B'; and the light beam A 'is transmitted by the dichroic mirror (2) and then integrated with the light beam B' to obtain an illumination light beam.
2. The reflective high-power laser lighting module according to claim 1, wherein a beam shaping device (5) for converging the laser beam and projecting the laser beam onto the dichroic mirror (2) is disposed between the laser light source (1) and the dichroic mirror (2).
3. The reflective high-power laser lighting module according to claim 2, wherein the beam shaping device (5) comprises a converging lens (51) and a collimating lens (52) sequentially arranged along the laser emergent light path.
4. A reflective high power laser lighting module according to claim 1, wherein a first focusing device (6) is disposed between the dichroic mirror (2) and the scattering device (3) for focusing the light beam a to project onto the scattering device (3); the dichroic mirror (2) and the wavelength conversion device (4) are provided with a second focusing device (7) for focusing the light beam B such that it impinges on the wavelength conversion device (4).
5. A reflective high power laser lighting module according to claim 4, wherein said first focusing device (6) and said second focusing device (7) each comprise a plano-convex lens disposed along the optical path of the light beam, the planes of said plano-convex lenses facing said scattering device (3) and said wavelength conversion device (4), respectively.
6. The reflective high power laser illumination module according to claim 5, wherein the first focusing device (6) and the second focusing device (7) each comprise two or more plano-convex lenses.
7. The reflective high-power laser lighting module according to claim 1, wherein the wavelength conversion device (4) comprises a fluorescent color wheel (41) and a brushless motor for driving the fluorescent color wheel (41) to rotate.
8. The reflection type high power laser lighting module according to claim 1, comprising a lighting beam shaping device (8) for focusing and shaping the light beams a 'and B'.
9. The reflection type high power laser lighting module according to claim 8, wherein the lighting beam shaping device (8) comprises two plano-convex lenses arranged in sequence according to the light beam emergent light path.
10. The reflective high-power laser lighting module according to claim 1, wherein the laser light source (1) is a plurality of laser diodes distributed in an array.
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| CN202222808892.0U CN218441864U (en) | 2022-10-25 | 2022-10-25 | Reflective high-power laser lighting module |
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| CN202222808892.0U CN218441864U (en) | 2022-10-25 | 2022-10-25 | Reflective high-power laser lighting module |
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Effective date of registration: 20230927 Address after: 266000 room 205, building 1, 61 Guangsheng Road, high tech Zone, Qingdao, Shandong Province Patentee after: Qingdao Zhongke Zhifu Photoelectric Technology Co.,Ltd. Address before: 313000 office 1206-11, floor 12, building 3, No. 1366, Hongfeng Road, Huzhou Economic and Technological Development Zone, Huzhou City, Zhejiang Province Patentee before: HUZHOU CAS PHOTOELECTRIC TECHNOLOGY CO.,LTD. |
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