CN210894973U - Laser light source system - Google Patents
Laser light source system Download PDFInfo
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- CN210894973U CN210894973U CN201922186302.3U CN201922186302U CN210894973U CN 210894973 U CN210894973 U CN 210894973U CN 201922186302 U CN201922186302 U CN 201922186302U CN 210894973 U CN210894973 U CN 210894973U
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Abstract
The utility model relates to a laser display technology field discloses a laser light source system for improve the ray apparatus light efficiency, reduce the ray apparatus volume. The laser device comprises a laser array, a diffusion component, a dichroic mirror, a first condenser lens group, a fluorescent wheel device, a collimating lens group, an 1/4 wave plate, a reflecting component and a second condenser lens group. The laser array and the diffusion component form a first light path, the first condenser lens group, the fluorescent wheel device, the collimating lens group, the 1/4 wave plate and the reflection component form a second light path, and optical axes of the first light path and the second light path are perpendicular to each other. The dichroic mirror is arranged at the intersection point of the first optical path and the second optical path, and the normal of the reflecting surface forms an angle of 45 degrees with the first optical path and the second optical path. The dichroic mirror reflects the first polarized light emitted by the laser into the second light path, the first polarized light twice penetrates the 1/4 wave plate in the second light path, is converted into second polarized light, and penetrates the dichroic mirror to enter the second light condensing lens group, and light collection is completed. The utility model is suitable for a laser projector.
Description
Technical Field
The utility model relates to a laser display technology field, in particular to laser light source system.
Background
The laser light source has the advantages of high brightness, high efficiency, long service life, high color gamut, etc. and is being increasingly applied to projection display products.
In the present laser projection display product, most of laser light source systems adopt a laser excitation fluorescent powder light-emitting mode to realize the illumination of the projection system, and the specific realization mode is as follows: the laser emits blue laser, the blue laser irradiates a fluorescent wheel rotating at high speed under the condensation effect of the optical component, the fluorescent wheel is coated with fluorescent powder, yellow green light is emitted under the irradiation of the laser, red green light is filtered out through the filter wheel rotating synchronously, and the red green light and the blue laser are synthesized into white light through the light combining system in a time sharing mode and output.
In the prior art, when a laser projection product outputs blue light, laser light penetrates through a transmission region of a fluorescent wheel and enters a blue light turning light path. The blue light turning light path is usually realized by combining a plurality of reflectors and lenses, so that the cost is high and the size of the optical machine is large.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: a laser light source system is provided for improving the light efficiency of an optical machine and reducing the volume of the optical machine.
In order to solve the above problem, the utility model adopts the following technical scheme: a laser light source system comprises an 1/4 wave plate, a first laser array, a first diffusion component, a first dichroic mirror, a first condenser lens group, a fluorescent wheel device, a collimating lens group, a reflecting component and a second condenser lens group;
the fluorescent wheel device comprises a substrate and a motor, wherein the substrate comprises a diffusion transmission area and one or more fluorescent reflection areas;
the 1/4 wave plate is arranged behind the collimating lens group and in front of the reflecting component, and the optical axis direction of the 1/4 wave plate forms an angle of 45 degrees with the incident polarized light direction;
the laser array and the diffusion component are arranged oppositely, and the laser array and the diffusion component form a first light path; the first condenser lens group, the collimating lens group, the 1/4 wave plate, the reflecting component and the second condenser lens group are coaxially arranged to form a second light path; the first dichroic mirror is arranged at the intersection of the first light path and the second light path, and the normal of the reflecting surface of the first dichroic mirror and the optical axes of the first light path and the second light path form an angle of 45 degrees respectively;
the first condenser lens group and the collimating lens group are arranged at two sides of the fluorescent wheel device and have a confocal point, and the focus is positioned on the surface of the fluorescent wheel substrate;
the light emitted by the first laser array is first polarized light, the dichroic mirror reflects the first polarized light emitted by the first laser array into the second optical path, the first polarized light twice penetrates through the 1/4 wave plate in the second optical path and is converted into second polarized light by the 1/4 wave plate, and the second polarized light penetrates through the dichroic mirror and enters the second light condensing lens group to finish light collection.
Specifically, the method comprises the following steps: when the light emitted by the laser array is P polarized light in the wavelength range of 440nm-460nm, the dichroic mirror can reflect the P polarized light in the wavelength range of 440nm-460nm and transmit S polarized light in the wavelength range of 440nm-460nm and natural light in the wavelength range of 461nm-700nm, and the 1/4 wave plate is used in combination with the reflecting component, can convert the P polarized light into the S polarized light and can reverse the propagation direction of the light;
when the light emitted by the laser array is S-polarized light in the wavelength range of 440nm-460nm, the dichroic mirror can reflect the S-polarized light in the wavelength range of 440nm-460nm and transmit the P-polarized light in the wavelength range of 440nm-460nm and natural light in the wavelength range of 461nm-700nm, and the 1/4 wave plate is used in combination with the reflecting component to convert the S-polarized light into the P-polarized light and reverse the propagation direction of the light.
Specifically, the method comprises the following steps: the reflective member may be a generally planar mirror.
Furthermore, in order to meet the requirement of a bicolor light source, the utility model can also comprise a second laser array and a second diffusion component; the reflecting component is a second dichroic mirror, the second diffusing component is disposed behind the second dichroic mirror, and the second laser array is disposed behind the second diffusing component; the second dichroic mirror may reflect the laser beam emitted by the first laser array and transmit the laser beam emitted by the second laser array.
Further, the light emitted by the second laser array may be red laser light or green laser light.
The utility model has the advantages that: the utility model discloses utilize 1/4 wave plate can change the polarization state characteristic of light, realize polarization beam split, close light, reducible use optical element reaches and reduces the ray apparatus volume, improves the purpose of light utilization efficiency.
Drawings
Fig. 1 is a schematic diagram of an optical path of a novel laser light source provided by the present invention;
FIG. 2 is a schematic view of a fluorescence wheel according to the first embodiment;
fig. 3A is a schematic side view of a color filter wheel according to a first embodiment;
fig. 3B is a schematic front view of a color filter wheel according to the first embodiment;
FIG. 4 is a schematic diagram of the optical path of a novel two-color laser light source;
FIG. 5A is a schematic side view of a fluorescent wheel according to a second embodiment;
FIG. 5B is a schematic front view of a fluorescent wheel according to the second embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention, and that the described embodiments are merely illustrative of some, but not all embodiments of the invention.
Example one
As shown in fig. 1, the present embodiment provides a novel laser light source, which includes a laser array 1, a diffusion component 2, a dichroic mirror 3, a first condenser lens group 4, a fluorescence wheel device 5, a collimating lens group 6, an 1/4 wave plate 7, a blue reflector 8, and a second condenser lens group 9;
wherein, the laser array 1 emits P polarized light with the wavelength of 455 +/-5 nm; a diffusion sheet 1 is arranged in front of the laser array 1, and the diffusion sheet 1 has the function of homogenizing laser spots and decoherence. The laser array 1 and the diffusion member 2 are disposed opposite to each other, and form a first optical path GL 1.
The first condenser lens group 4, the collimating lens group 6, the 1/4 wave plate 7, the reflector 8 and the second condenser lens group 9 are coaxially arranged to form a second light path GL 2; the dichroic mirror is arranged at the intersection of the first optical path and the second optical path, the dichroic mirror 3 may be specifically arranged between the diffusion sheet 1 and the first condenser lens group 4, the normal of the reflection surface makes an angle of 45 ° with the laser beam, that is, the laser beam is incident on the surface of the dichroic mirror at an angle of 45 °, and the reflected light makes an angle of 90 ° with the incident light.
The surface of the dichroic mirror 3 is plated with a polarization beam splitting film, P polarized light with the wavelength range of 445nm-460nm is reflected, and S polarized light with the wavelength range of 445nm-460nm and natural light with the wavelength range of 460nm-680nm are transmitted;
as shown in fig. 2, the fluorescent wheel device 5 is composed of a base plate 51 and a motor 52, and the base plate 51 is coaxially coupled to the motor 52 and rotates around the shaft at a high speed. The substrate 51 includes a fluorescence reflection area 51R, a fluorescence reflection area 51G, and a diffusion transmission area 51B. The substrate material of the fluorescence reflection region 51R and the fluorescence reflection region 51G is mirror aluminum, and the surface is coated with a 5mm wide fluorescent powder band; the substrate material of the diffuse transmission region 51B is glass or fused silica, and the surface is a diffuse scattering surface.
The first condenser lens group 4 and the collimating lens group 6 are respectively arranged in front of and behind the fluorescent wheel device 5, the first condenser lens group 4 and the collimating lens group 6 are confocal, and the focus is on the surface of the substrate of the fluorescent wheel device 5.
1/4 wave plate 7 is placed perpendicular to the laser beam propagation direction, and the optical axis of 1/4 wave plate makes an angle of 45 ° with the polarization direction of the laser.
As shown in fig. 3A and 3B, the color filter wheel device 10 includes a substrate 101 and a motor 102, wherein the substrate 101 includes a green filter region 101G, a red filter region 101R, and a blue diffusion region 101B. The angle of the green filter region 101G is the same as the angle of the fluorescence reflection region 51G of the fluorescence wheel 5; the red filter region 101R has the same angle with the fluorescence reflection region 51R of the fluorescence wheel 5; the blue diffusion region 101B is at the same angle as the diffusion transmission region of the fluorescent wheel 5. The color filter wheel device 10 rotates synchronously with the fluorescent wheel device 5.
When the diffuse transmission area 51B of the fluorescent wheel device 5 rotates to the optical axis position, the blue P-polarized laser beam emitted by the laser array 1 transmits through the area and is collimated into parallel light by the following collimating lens group 6, the collimated parallel light beam transmits through 1/4 wave plate 7, is reflected by the blue light reflector 8 and transmits through 1/4 wave plate for the second time, at this time, the P-polarized light is converted into S-polarized light; the S polarized light sequentially passes through the collimating lens group 6, the diffusion transmission region 51B of the fluorescent wheel device 5, the first condenser lens group 4, the dichroic mirror 3, the second condenser lens group 9, and the color filter wheel 10, and then is focused on the entrance end of the light rod 20.
When the fluorescent reflection areas 51R and 51G of the fluorescent wheel device 5 are rotated to the optical axis position, the blue laser beam is irradiated to the phosphor surface to emit red and green fluorescent lights. The fluorescence is reflected by the aluminum substrate 51, passes through the first condenser lens group 4, the dichroic mirror 3, the second condenser lens group 9, and the color filter wheel 10, and is focused on the entrance end of the light rod 20.
The laser light source system provided by the embodiment utilizes the 1/4 wave plate to change the polarization state characteristic of light, thereby realizing polarization splitting and light combination, reducing the use of optical elements, and achieving the purposes of reducing the volume of the optical machine and improving the light utilization efficiency.
Example two
As shown in fig. 4, the present embodiment provides a novel two-color laser light source, which includes a first laser array 11, a second laser array 12, a first diffusion component 21, a second diffusion component 22, a first dichroic mirror 3, a first condenser lens group 4, a fluorescent wheel device 5, a collimating lens group 6, a 1/4 wave plate 7, a second dichroic mirror 8, and a second condenser lens group 9.
The laser array 1 and the diffusion member 2 are disposed opposite to each other, and form a first optical path GL 1. The first condenser lens group 4, the collimating lens group 6, the 1/4 wave plate 7, the reflector 8, the second condenser lens group 9, the second laser array 12 and the second diffusion component 22 are coaxially arranged to form a second light path GL 2; the dichroic mirror is arranged at the intersection of the first optical path and the second optical path, and as with the embodiment, the dichroic mirror 3 is specifically arranged between the diffusion sheet 1 and the first condenser lens group 4, the normal of the reflection surface makes an angle of 45 ° with the laser beam, that is, the laser beam enters the surface of the dichroic mirror at an angle of 45 °, and the reflected light makes an angle of 90 ° with the incident light.
The first laser array 11 emits P-polarized light with a wavelength of 455 +/-5 nm; the second laser array 12 emits red laser with a wavelength of 638 +/-5 nm, and the polarization state can be either P or S; the first laser array 11 and the second laser array 12 alternately emit light in a time-sharing manner.
Second dichroic mirror 8 may reflect the blue laser beam emitted from first laser array 11 and transmit the red laser beam emitted from second laser array 12.
The second diffusing member 22 is disposed behind the second dichroic mirror 8, and the second laser light array 12 is disposed behind the second diffusing member 22.
As shown in fig. 5A and 5B, the substrate 51 of the fluorescence wheel device 5 in the present embodiment includes a diffusion transmission region 51R, a diffusion transmission region 51B, and a fluorescence reflection region 51G.
When the diffuse transmission area 51B and the fluorescence reflection area 51G of the fluorescence wheel device 5 rotate to the optical axis position, the first laser array 11 emits blue laser beams, and the optical path principle is the same as that of the first embodiment, which is not described herein again.
When the diffusion transmission area 51R of the fluorescent wheel device 5 rotates to the optical axis position, the second laser array 12 emits a red laser beam, and the laser beam sequentially passes through the second diffusion component 22, the second dichroic mirror 8, the 1/4 wave plate 7, the collimating lens group 6, the diffusion transmission area 51R, the first condensing lens group 4, the first dichroic mirror 3, the second condensing lens group 9, and the color filter wheel device 10, and then is focused on the entrance end of the light rod 20;
compared with the first embodiment, the two-color laser light source provided by the embodiment has the advantages that the red laser array and the diffusion part are added, and the conventional plane reflecting mirror is replaced by the second dichroic mirror, so that the simplified layout of the two-color light path is realized.
Although the invention has been described herein with reference to the illustrated embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure herein. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (5)
1. A laser light source system comprises a first laser array, a first diffusion component, a first dichroic mirror, a first condenser lens group, a fluorescent wheel device, a collimating lens group, a reflecting component and a second condenser lens group; the fluorescent wheel device comprises a substrate and a motor, wherein the substrate comprises a diffusion transmission area and one or more fluorescent reflection areas;
the method is characterized in that: the liquid crystal display further comprises an 1/4 wave plate, wherein the 1/4 wave plate is arranged behind the collimating lens group and in front of the reflecting component, and the optical axis direction of the 1/4 wave plate forms an angle of 45 degrees with the incident polarized light direction;
the laser array and the diffusion component are arranged oppositely, and the laser array and the diffusion component form a first light path; the first condenser lens group, the collimating lens group, the 1/4 wave plate, the reflecting component and the second condenser lens group are coaxially arranged to form a second light path; the first dichroic mirror is arranged at the intersection of the first light path and the second light path, and the normal of the reflecting surface of the first dichroic mirror and the optical axes of the first light path and the second light path form an angle of 45 degrees respectively;
the first condenser lens group and the collimating lens group are arranged at two sides of the fluorescent wheel device and have a confocal point, and the focus is positioned on the surface of the fluorescent wheel substrate;
the light emitted by the first laser array is first polarized light, the dichroic mirror reflects the first polarized light emitted by the first laser array into the second optical path, the first polarized light twice penetrates the 1/4 wave plate in the second optical path and is converted into second polarized light by the 1/4 wave plate, and the second polarized light penetrates the dichroic mirror to enter the second condenser lens group.
2. A laser light source system as claimed in claim 1, wherein: when the light emitted by the laser array is P polarized light in the wavelength range of 440nm-460nm, the dichroic mirror can reflect the P polarized light in the wavelength range of 440nm-460nm and transmit S polarized light in the wavelength range of 440nm-460nm and natural light in the wavelength range of 461nm-700nm, and the 1/4 wave plate is used in combination with the reflecting component, can convert the P polarized light into the S polarized light and can reverse the propagation direction of the light;
when the light emitted by the laser array is S-polarized light in the wavelength range of 440nm-460nm, the dichroic mirror can reflect the S-polarized light in the wavelength range of 440nm-460nm and transmit the P-polarized light in the wavelength range of 440nm-460nm and natural light in the wavelength range of 461nm-700nm, and the 1/4 wave plate is used in combination with the reflecting component to convert the S-polarized light into the P-polarized light and reverse the propagation direction of the light.
3. A laser light source system as claimed in claim 1, wherein: the reflecting component is a reflector.
4. A laser light source system as claimed in claim 1, wherein: further comprising a second laser array and a second diffusion member; the reflecting component is a second dichroic mirror, the second diffusing component is disposed behind the second dichroic mirror, and the second laser array is disposed behind the second diffusing component; the second dichroic mirror may reflect the laser beam emitted by the first laser array and transmit the laser beam emitted by the second laser array.
5. A laser light source system as claimed in claim 4, wherein: the light emitted by the second laser array is red laser or green laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922186302.3U CN210894973U (en) | 2019-12-09 | 2019-12-09 | Laser light source system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922186302.3U CN210894973U (en) | 2019-12-09 | 2019-12-09 | Laser light source system |
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| CN210894973U true CN210894973U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283610A (en) * | 2020-09-30 | 2021-01-29 | 赫尔曼·友瀚·范·贝赫库姆 | Light source device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283610A (en) * | 2020-09-30 | 2021-01-29 | 赫尔曼·友瀚·范·贝赫库姆 | Light source device |
| CN112283610B (en) * | 2020-09-30 | 2023-08-18 | 赫尔曼·友瀚·范·贝赫库姆 | Light source device |
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