CN110737167A - Laser fluorescent light source and projector - Google Patents

Laser fluorescent light source and projector Download PDF

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Publication number
CN110737167A
CN110737167A CN201911041254.7A CN201911041254A CN110737167A CN 110737167 A CN110737167 A CN 110737167A CN 201911041254 A CN201911041254 A CN 201911041254A CN 110737167 A CN110737167 A CN 110737167A
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China
Prior art keywords
light
compensation
laser
dichroic mirror
wavelength conversion
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CN201911041254.7A
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CN110737167B (en
Inventor
刘金根
陈龙
刘飞
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Wuxi Seemile Laser Display Technology Co Ltd
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Wuxi Seemile Laser Display Technology Co Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention provides laser fluorescence light source and a projector, and relates to the technical field of optics, wherein the laser fluorescence light source comprises a wavelength conversion device, an excitation light laser and a compensation light laser which are arranged at two sides of the wavelength conversion device, the wavelength conversion device comprises an opaque substrate and a compensation area for transmitting compensation light, a wavelength conversion material which does not need the compensation light is arranged on the opaque substrate, the compensation area comprises a blank area and/or a compensation substrate, and a second wavelength conversion material which needs the compensation light is arranged on the compensation substrate.

Description

Laser fluorescent light source and projector
Technical Field
The invention relates to the technical field of optics, in particular to laser fluorescent light sources and a projector.
Background
From the Light source technology, the projection technology is mainly classified into bulb projection, LED (Light Emitting Diode) projection, laser fluorescence projection, and pure laser projection, wherein the laser fluorescence projection technology occupies the mainstream market of the laser projection technology at present.
The laser fluorescence projection technology mainly adopts monochromatic short-wave exciting light and wavelength conversion materials to realize the light emission of white light and primary colors of red, green, blue and the like, and simultaneously adds red laser and/or green laser to compensate the color and the brightness of the primary colors of red and/or green. However, the existing light source based on the laser fluorescence projection technology has the problems of complex structure and large volume or has the problem of low light extraction efficiency.
Disclosure of Invention
The invention aims to provide laser fluorescent light sources and projectors, which are used for simplifying the structure of the light source, reducing the volume of the light source and improving the light emitting efficiency of the light source.
The invention provides laser fluorescent light sources, which comprise a wavelength conversion device, an excitation light laser and a compensation light laser, wherein the excitation light laser and the compensation light laser are arranged on two sides of the wavelength conversion device, the wavelength conversion device comprises an opaque substrate and a compensation region used for transmitting compensation light, a th wavelength conversion material which does not need compensation light is arranged on the opaque substrate, the compensation region comprises a th blank region and/or a compensation substrate, a second wavelength conversion material which needs compensation light is arranged on the compensation substrate, the blank region is used for transmitting excitation light emitted by the excitation light laser and transmitting th compensation light emitted by the compensation light laser, the wavelength of the th compensation light is matched with the wavelength of the excitation light, the compensation substrate is used for reflecting target stimulated light obtained by wavelength conversion of the excitation light by the second wavelength conversion material and transmitting the second compensation light emitted by the compensation light laser, and the wavelength of the second compensation light is matched with the wavelength of the target stimulated light.
, a dichroic mirror is disposed between the excitation light laser and the wavelength conversion device, and the dichroic mirror is configured to transmit the excitation light and reflect the excited light obtained by wavelength conversion of the excitation light by the wavelength conversion device and the target compensation light emitted by the compensation light laser, or reflect the excitation light and transmit the excited light and the target compensation light, where the target compensation light includes the compensation light and/or the second compensation light.
, the excited light includes the excited light obtained by converting the excitation light with the wavelength converting material, and the target excited light is included when the compensation area includes the compensation substrate.
Step , said compensation region comprising said clear region, said laser fluorescent light source further comprising a second dichroic mirror disposed between said wavelength conversion device and said compensation light laser, and a th light directing component disposed between said second dichroic mirror and said dichroic mirror, said second dichroic mirror for reflecting said excitation light and transmitting said compensation light, said th light directing component for directing said excitation light to said dichroic mirror.
, the blank area comprises a notch or a transparent substrate connected with the opaque substrate, a full-wave-band antireflection film is arranged on the transparent substrate, and the excitation light laser and the compensation light laser are both blue light lasers.
, the excitation laser emits blue excitation light with wavelength different from that of the compensation laser, the dichroic mirror and the second dichroic mirror each include dichroic elements for wavelength splitting;
alternatively, the first and second electrodes may be,
the polarization direction of the blue excitation light is different from the polarization direction of the blue compensation light, the th dichroic mirror includes a dichroic element that employs wavelength division light and polarization division light, and the second dichroic mirror includes a dichroic element that employs polarization division light.
, the wavelength of the blue excitation light emitted from the excitation light laser is smaller than that of the blue compensation light emitted from the compensation light laser, the transmission band of the dichroic mirror comprises 440-;
alternatively, the first and second electrodes may be,
the polarization direction of the blue excitation light is perpendicular to the polarization direction of the blue compensation light, the th dichroic mirror is a short-wave-pass spectral polarization element which is consistent with the polarization direction of the blue excitation light, the transmission band of the th dichroic mirror comprises 440-760 nm, the reflection band of the th dichroic mirror comprises 470-760nm, and the second dichroic mirror is a spectral polarization element which is consistent with the polarization direction of the blue compensation light.
, the compensation region includes the compensation substrate, the dichroic mirror includes a dichroic element for splitting light with wavelength, the compensation substrate includes a second transparent substrate and a film layer, the film layer is disposed between the second transparent substrate and the second wavelength conversion material, and the film layer is used for reflecting light which does not belong to the spectral band corresponding to the second compensation light or has an incident angle larger than the set angle threshold value, and transmitting light which is located in the spectral band and has an incident angle smaller than or equal to the angle threshold value.
, the second compensation light is polarized light, and the film layer is used for transmitting light with the polarization direction of the second compensation light and reflecting light with the polarization direction different from that of the second compensation light.
, the compensation substrate further comprises an optical structure layer disposed between the film layer and the second wavelength conversion material, the optical structure layer is used for totally reflecting the target excited light with an incident angle larger than a set second angle threshold and transmitting the second compensation light.
, the compensation substrate further comprises a second film layer disposed on a side of the second transparent substrate away from the second wavelength converting material, the second film layer for anti-reflection of the second compensation light.
, the excitation light laser is a blue laser, the wavelength conversion device further includes a second blank region for transmitting blue excitation light emitted by the excitation light laser, the laser fluorescence light source further includes a third dichroic mirror and a second light guide component, the third dichroic mirror is disposed between the wavelength conversion device and the compensation light laser, the second light guide component is disposed between the third dichroic mirror and the dichroic mirror, the third dichroic mirror is configured to reflect the blue excitation light and transmit the second compensation light, and the second light guide component is configured to guide the blue excitation light to the dichroic mirror.
, the third dichroic mirror is a long-wave pass dichroic mirror, or the polarization direction of the blue excitation light is different from the polarization direction of the second compensation light, and the third dichroic mirror is a spectrum polarization element which is equal to of the polarization direction of the second compensation light.
Further , the wavelength conversion device includes a plurality of the compensation substrates and a plurality of the second wavelength conversion materials corresponding to the compensation substrates , and the second compensation light includes a plurality of time sequential lights corresponding to the second wavelength conversion materials .
, when the compensation area includes the compensation substrate and the blank area, the excitation laser is a blue laser, the compensation laser includes a blue laser, and also includes a red laser and/or a green laser;
the laser fluorescence light source further comprises a second dichroic mirror and a light guide component, wherein the second dichroic mirror is arranged between the wavelength conversion device and the compensating light laser, the light guide component is arranged between the second dichroic mirror and the dichroic mirror, the second dichroic mirror is used for reflecting the excitation light and transmitting the target compensating light, and the light guide component is used for guiding the excitation light to the dichroic mirror.
, the wavelength of the blue excitation light emitted from the excitation light laser is smaller than that of the blue compensation light, the transmission band of the dichroic mirror includes 440-.
, the opaque substrate is made of metals, alloys and compounds with thermal conductivity greater than a set thermal conductivity threshold, and the compensation substrate is made of metals, glass, alumina, sapphire and silicon nitride.
The invention also provides projectors comprising the laser fluorescent light source.
The invention provides a laser fluorescence light source and a projector, wherein the laser fluorescence light source comprises a wavelength conversion device, an excitation light laser and a compensation light laser which are arranged on two sides of the wavelength conversion device, the wavelength conversion device comprises an opaque substrate and a compensation area for transmitting compensation light, a th wavelength conversion material which does not need the compensation light is arranged on the opaque substrate, the compensation area comprises a th blank area and/or a compensation substrate, a second wavelength conversion material which needs the compensation light is arranged on the compensation substrate, the th blank area is used for transmitting the excitation light emitted by the excitation light laser and transmitting th compensation light emitted by the compensation light laser, the wavelength of the th compensation light is matched with the wavelength of the excitation light, the compensation substrate is used for reflecting target stimulated light obtained by wavelength conversion of the excitation light by the second wavelength conversion material and transmitting the second compensation light emitted by the compensation light, the wavelength of the second compensation light is matched with the wavelength of the target stimulated light, the laser fluorescence light source can be improved by arranging the excitation light laser and the compensation light laser light on two sides of the wavelength conversion device, compared with the existing fluorescence light source () by arranging the compensation light and the compensation light in the wavelength conversion device, the existing fluorescence light source is improved by arranging the compensation light source and the compensation light source which is based on the existing fluorescence light conversion light.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of laser fluorescent light sources according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of wavelength conversion devices according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another kinds of laser fluorescent light sources based on the wavelength conversion device shown in FIG. 2;
FIG. 4 is a schematic structural diagram of another laser fluorescent light sources according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another wavelength conversion devices according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of compensation substrates according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another laser fluorescence light sources based on the wavelength conversion device shown in FIG. 5;
FIG. 8 is a schematic structural diagram of another laser fluorescent light sources according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another wavelength conversion devices according to an embodiment of the present invention.
The figure shows 101-an excitation light laser, 102-an th dichroic mirror, 103-a wavelength conversion device, 104-a second dichroic mirror, 105-a compensated light laser, 106-a th light guiding component, 1061-a sixth lens, 1062-a th mirror, 1063-a second light homogenizing element, 1064-a second mirror, 107-a third dichroic mirror, 108-a second light guiding component, 201-an opaque substrate, 202-a clear region, 203-a th wavelength converting material, 204-a driving part, 205-a compensating substrate, 2051-a second transparent substrate, 2052-a th film layer, 2053-an optical structure layer, 2054-a second film layer, 206-a second wavelength converting material, 301-a th lens, 302-a second lens, 303-a th light homogenizing element, 304-a third lens, 305-a fourth lens, 306-a fifth lens, 307-a filtering device, 308-a fourth lens.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it is to be understood that the described embodiments are partial embodiments rather than complete embodiments.
The laser fluorescence light source and the projector provided by the embodiment of the invention can realize the light emitting of the compensating light and the stimulated light or the compensating light and the exciting light in the same optical path and ensure the heat radiation capability of the wavelength conversion device based on the specific structural design of the wavelength conversion device, thereby reducing the cost of independently setting the light combining path, reducing the volume of the light source, simplifying the optical path and improving the light emitting efficiency of the light source.
For the understanding of the present embodiment, first, the laser fluorescent light sources disclosed in the embodiments of the present invention will be described in detail.
The embodiment of the invention provides laser fluorescent light sources, which comprise a wavelength conversion device, an excitation light laser and a compensation light laser, wherein the excitation light laser and the compensation light laser are arranged on two sides of the wavelength conversion device, the wavelength conversion device comprises an opaque substrate and a compensation region for transmitting compensation light, a th wavelength conversion material which does not need compensation light is arranged on the opaque substrate, the compensation region comprises a th blank region and/or a compensation substrate, a second wavelength conversion material which needs compensation light is arranged on the compensation substrate, the second wavelength conversion material is arranged on a side close to the excitation light laser, the th wavelength conversion material and the second wavelength conversion material can be, but are not limited to, fluorescent powder, and the incidence direction of the excitation light emitted by the excitation light laser and the compensation light emitted by the compensation light laser on the wavelength conversion device is opposite.
The laser fluorescent light source performs compensation of excitation light, for example, blue light (the target light is blue light) when the compensation region includes the th blank region, performs compensation of lasing, for example, or more of blue light, red light, and green light (the target light includes or more of blue light, red light, and green light) when the compensation region includes the compensation substrate, and performs compensation of excitation light and lasing, for example, blue light, and red light and/or green light (the target light includes blue light, and red light and/or green light) when the compensation region includes the th blank region and the compensation substrate, respectively.
Specifically, the th blank area is used for transmitting the excitation light emitted by the excitation light laser and the th compensating light emitted by the compensating light laser, the th compensating light has a wavelength matched with that of the excitation light, and the th blank area can be a notch or a th transparent substrate connected with an opaque substrate.
For example, the threshold is set to be 20nm, if the wavelength of the excitation light is in the range of 440-460nm, the wavelength of the th compensation light may be in the range of 460-470nm, in optional implementations, the wavelength of the excitation light is 445nm or 455nm, and the wavelength of the th compensation light is 465 nm.
The compensation substrate is used for transmitting second compensation light emitted by the compensation light laser and reflecting target excited light obtained by wavelength conversion of the excitation light by the second wavelength conversion material.
The wavelength of the second compensation light is matched with the wavelength of the target stimulated light, that is, the wavelength of the second compensation light is located in the spectral band of the target stimulated light. For example, if the second compensation light is red light, that is, red light needs to be compensated, the target excited light may be red excited light or yellow excited light with a spectrum band including a red light wavelength (where the yellow excited light may output red light through subsequent filtering); for another example, if the second compensation light is green/blue light, that is, the green/blue light needs to be compensated, the target stimulated light may be green/blue stimulated light whose spectrum band includes green/blue wavelengths.
Based on the working principle of the laser fluorescence light source, exciting light emitted by an exciting light laser is incident on the wavelength conversion device, when the exciting light is incident on a th wavelength conversion material of the wavelength conversion device, stimulated light which does not need to be compensated is generated, the stimulated light is reflected by an opaque substrate and then is output, and the opaque substrate can store and dissipate heat generated by a th wavelength conversion material, so that the light emitting efficiency of the laser fluorescence light source is ensured.
Alternatively, the target compensation light may be time-series light, and when the target light needs to be compensated, the compensation light laser is in an ON (open) state, and when the target light does not need to be compensated, the compensation light laser is in an OFF (close) state, that is, the compensation light laser outputs the target compensation light only when the excitation light is incident ON the compensation region (the wavelength conversion device outputs the excitation light and/or the target excited light).
Alternatively, the opaque substrate may be made of or more metals, alloys and compounds with thermal conductivity greater than a set thermal conductivity threshold, which is not limited herein, and may be set according to practical requirements, for example, 20W/mK, and the opaque substrate may be made of or more metals selected from aluminum, aluminum nitride, magnesium aluminum alloy, copper and silicon carbide, and the compensating substrate may be made of or more metals selected from aluminum nitride, glass, aluminum oxide, sapphire and silicon nitride.
Optionally, in order to achieve output of the excited light and the target compensation light generated by the wavelength conversion device, an th dichroic mirror is disposed between the excited light laser and the wavelength conversion device, and the th dichroic mirror is configured to transmit the excited light and reflect the excited light obtained by wavelength conversion of the excited light by the wavelength conversion device and the target compensation light emitted by the compensation light laser, or reflect the excited light and transmit the excited light and the target compensation light, where the target compensation light includes the th compensation light and/or the second compensation light, and the stimulated light includes a th wavelength conversion material and a stimulated light obtained by wavelength conversion of the excited light, and when the compensation region includes the compensation substrate, the stimulated light further includes the target stimulated light.
In the embodiment of the invention, the laser fluorescence light source can realize the same optical path output of the target compensation light emitted by the compensation light laser and the received laser light generated by the wavelength conversion equipment by arranging the excitation light laser and the compensation light laser at two sides of the wavelength conversion equipment and arranging the compensation area for transmitting the compensation light in the wavelength conversion equipment, so that the laser fluorescence light source does not need to be separately provided with a light combining optical path, and compared with the existing light source based on the reflection type wavelength conversion equipment, the structure of the light source is simplified, and the volume of the light source is reduced. In addition, compared with the light source based on the existing transmission type wavelength conversion equipment, the laser fluorescence light source improves the heat dissipation capacity through the non-transparent substrate in the wavelength conversion equipment, so that the light extraction efficiency of the light source is improved.
For ease of understanding, the laser fluorescent light source when the compensation region includes the th blank region will be described in detail below with reference to fig. 1 to 3.
Referring to a schematic structural diagram of laser fluorescent light sources shown in fig. 1 and a schematic structural diagram of wavelength conversion devices shown in fig. 2, the laser fluorescent light source comprises a wavelength conversion device 103, an excitation laser 101 and a compensation laser 105 which are arranged on two sides of the wavelength conversion device 103, a th dichroic mirror 102 is arranged between the excitation laser 101 and the wavelength conversion device 103, a second dichroic mirror 104 is arranged between the wavelength conversion device 103 and the compensation laser 105, a th light guide component 106 is arranged between the second dichroic mirror 104 and the th dichroic mirror 102, the wavelength conversion device 103 comprises an opaque substrate 201 and a blank region 202 (i.e. the blank region mentioned above) for transmitting compensation light, and a th wavelength conversion material 203 which does not need compensation light is arranged on the opaque substrate 201.
The blank region 202 is used for transmitting the excitation light emitted by the excitation-light laser 101 and transmitting the th compensation light emitted by the compensation-light laser 105. the -th dichroic mirror 102 is used for transmitting the excitation light and reflecting the excitation light and th compensation light generated by the -th wavelength conversion material 203 (as shown in fig. 1), or reflecting the excitation light and transmitting the excitation light and th compensation light. the second dichroic mirror 104 is used for reflecting the excitation light and transmitting the th compensation light, and the -th light guide member 106 is used for guiding the excitation light to the -th dichroic mirror 102.
Specifically, the excitation laser 101 and the compensation laser 105 may both be blue lasers, that is, the laser fluorescence light source may be used to compensate for blue light, the blank region 202 may be a notch or -th transparent substrate connected to the opaque substrate 201, it should be noted that the connection may be a direct connection or an indirect connection, when the blank region 202 is -th transparent substrate, preferably, a full-band antireflection film is disposed on the -th transparent substrate, so that the transmittances of the blank region 202 to the excitation light and the -th compensation light may be increased, and the light extraction efficiency of the laser fluorescence light source may be increased.
The operation principle of the laser fluorescent light source is as shown in fig. 1, the excitation light (solid line) emitted by the excitation light laser 101 is incident on the th wavelength conversion material 203 of the wavelength conversion device 103 after passing through the th dichroic mirror 102, the 0 th wavelength conversion material 203 performs wavelength conversion on the excitation light to generate the stimulated light (long dotted line), the stimulated light is reflected back to the th dichroic mirror 102 by the opaque substrate 201 and then is output from the th dichroic mirror 102, thus the output of the stimulated light is realized based on the opaque substrate 201, because the opaque substrate 201 has high thermal conductivity, the influence of high temperature on the conversion efficiency of the wavelength conversion material can be reduced, and the light emitting efficiency of the light source is improved, in addition, as shown in fig. 1, the excitation light (solid line) emitted by the excitation light laser 101 is output after passing through the th dichroic mirror 102, the blank region 202 of the wavelength conversion device 103, the second dichroic mirror 104, the th light guide component 106 and the th dichroic mirror 102 in sequence, the th compensation light (short dotted line) emitted by the compensation light laser 105 passes through the second dichroic mirror 104, the 202 and the blank region , thus the light path structure is reduced, and the output of the simplified light source is not required for output of the light path reduction and the light source is.
In some possible embodiments, excitation laser 101 and compensation laser 105 are blue lasers, excitation laser 101 emits blue excitation light having a wavelength different from the wavelength of the blue compensation light emitted by compensation laser 105, and both dichroic mirror 102 and second dichroic mirror 104 include dichroic elements that split the wavelength.
Optionally, the wavelength of the blue excitation light is smaller than the wavelength of the blue compensation light, for example, the wavelength of the blue excitation light is 445nm or 455nm, and the wavelength of the blue compensation light is 465nm, the dichroic mirror 102 is a short-wavelength pass dichroic mirror, the transmission wavelength band of the dichroic mirror 102 includes 440-.
In another possible embodiments, the excitation laser 101 and the compensation laser 105 are blue lasers, the polarization direction of the blue excitation light is different from the polarization direction of the blue compensation light, the dichroic mirror 102 includes a dichroic element that uses wavelength splitting and polarization splitting, and the second dichroic mirror 104 includes a dichroic element that uses polarization splitting.
Optionally, the polarization direction of the blue excitation light is perpendicular to the polarization direction of the blue compensation light, the th dichroic mirror 102 is a short-wavelength pass spectrum polarization element corresponding to the polarization direction of the blue excitation light, the th dichroic mirror 102 has a transmission band including 440-470nm, the th dichroic mirror 102 has a reflection band including 470-760nm (the th dichroic mirror 102 may also be a long-wavelength pass spectrum polarization element, the transmission band includes 470-760nm, and the reflection band includes 440-470nm), and the second dichroic mirror 104 is a spectrum polarization element corresponding to the polarization direction of the blue compensation light.
Optionally, as shown in fig. 2, the wavelength conversion device 103 further includes a driving component 204 connected to the opaque substrate 201, and the driving component 204 is configured to drive the opaque substrate 201 to rotate. Specifically, the driving component 204 may be directly connected to the opaque substrate 201, or may be indirectly connected to the opaque substrate 201 through other components, which is not limited in this embodiment of the present invention. The drive component 204 may include an electric motor (or motor). By driving the opaque substrate 201 to rotate by the driving part 204, the time-series output of different color lights can be realized.
In possible implementations, as shown in FIG. 2, the opaque substrate 201 and the blank region 202 may each have a fan shape or a shape similar to a fan shape, and together form a disk shape, the th wavelength converting material 203 may be distributed in a fan-ring shape.
The embodiment of the present invention further provides a specific implementation manner of laser fluorescence light sources, referring to a schematic structural diagram of another laser fluorescence light source shown in fig. 3, compared to the laser fluorescence light source shown in fig. 1, the laser fluorescence light source further includes a lens 301, a second lens 302, and a dodging element 303 disposed between the excitation light laser 101 and the dichroic mirror 102, a third lens 304 disposed between the dichroic mirror 102 and the wavelength conversion device 103, a fourth lens 305 disposed between the wavelength conversion device 103 and the second dichroic mirror 104, a fifth lens 306 disposed between the second dichroic mirror 104 and the compensating light 105, and a filtering device 307 and a chromatic mirror 308 disposed on an output optical path, the lens 301 and the second lens 302 may constitute collimating lenses for collimating the excitation light emitted by the excitation light laser 101, the dodging element 303 is used for homogenizing the collimated light output by the second lens 302, eliminating the coherence of the light, the third lens 304, the fourth lens 305, and the fifth lens 308 are used for filtering the filtered light, and for improving the light purity of the filtered light, and for displaying the light after filtering effect of the light emitted by the light and the light emitted by the light guide 302, for example, and for improving the light purity of the light projector.
, as shown in fig. 3, the light guiding component 106 includes a sixth lens 1061, a mirror 1062, a second light uniformizing element 1063 and a second mirror 1064 in sequence along the light propagation direction, the sixth lens 1061 is used for shaping the excitation light, the second light uniformizing element 1063 is used for uniformizing the excitation light, the mirror 1062 and the second mirror 1064 are used for changing the light propagation direction, and the mirror 1062 and the second mirror 1064 can be 45 ° mirrors.
The implementation principle and the generated technical effect of the laser fluorescent light source shown in fig. 3 are similar to those of the laser fluorescent light source shown in fig. 1, and are not described herein again.
For ease of understanding, the laser fluorescence light source when the compensation region includes the compensation substrate will be described in detail below with reference to fig. 4 to 7.
Referring to fig. 4, a schematic structural diagram of another kinds of laser fluorescent light sources and a schematic structural diagram of another kinds of wavelength conversion devices are shown in fig. 5, the laser fluorescent light source includes a wavelength conversion device 103, an excitation light laser 101 and a compensation light laser 105 which are arranged at two sides of the wavelength conversion device 103, a th dichroic mirror 102 is arranged between the excitation light laser 101 and the wavelength conversion device 103, the wavelength conversion device 103 includes an opaque substrate 201 and a compensation substrate 205 for transmitting compensation light, the compensation substrate 205 is connected with the opaque substrate 201, a th wavelength conversion material 203 which does not need compensation light is arranged on the opaque substrate 201, and a second wavelength conversion material 206 which needs compensation light is arranged on the compensation substrate 205.
The compensation substrate 205 is configured to reflect target stimulated light obtained by wavelength conversion of the excitation light by the second wavelength conversion material 206, and transmit second compensation light emitted by the compensation light laser 105; the wavelength of the second compensation light is matched with the wavelength of the target stimulated light. The compensation substrate 205 is directly connected to the opaque substrate 201, or indirectly connected to the opaque substrate through other elements, which are not limited herein.
Excitation laser 101 may be a blue laser or a laser having a shorter wavelength than blue, for example, excitation laser 101 may be a 445nm or 455nm blue laser, compensation laser 105 may be a red laser, a green laser, or a blue laser, for example, compensation laser 105 may be a 638nm or 642nm red laser, a 525nm green laser, or a 465nm blue laser, dichroic mirror 102 includes a dichroic element that employs wavelength splitting, dichroic mirror 102 may be a short wavelength pass dichroic mirror for transmitting excitation light and reflecting light of other wavelengths (including stimulated light, target stimulated light, and second compensation light generated by wavelength converting material 203), dichroic mirror 102 may also be a long wavelength pass dichroic mirror for reflecting excitation light and transmitting light of other wavelengths.
The above-mentioned laser fluorescence light source operates on the principle that, as shown in fig. 4, excitation light (solid line) emitted from an excitation light laser 101 is incident on the th wavelength conversion material 203 of the wavelength conversion device 103 after passing through the th dichroic mirror 102, the th wavelength conversion material 203 performs wavelength conversion on the excitation light to generate a stimulated light (long dashed line), which is reflected back to the th dichroic mirror 102 by the opaque substrate 201 and then output from the th dichroic mirror 102, so that the output of the stimulated light is realized based on the opaque substrate 201, since the opaque substrate 201 has a high thermal conductivity, the influence of a high temperature on the conversion efficiency of the wavelength conversion material can be reduced, and the light output efficiency of the light source is improved, further, as shown in fig. 4, the excitation light (solid line) emitted from the excitation light laser 101 is incident on the second wavelength conversion material 206 of the wavelength conversion device 103 after passing through the th dichroic mirror 102, the second wavelength conversion material 206 performs wavelength conversion on the excitation light to generate target stimulated light (dot-dash line), which is reflected back to the rd dichroic mirror 102 by the target stimulated light, then the second wavelength conversion material 102, which is reduced, and the output of the second wavelength conversion light from the substrate 102, and the substrate 102, thus the reduced costs of the substrate 102 and the second wavelength conversion device are reduced, and the reduced wavelength conversion of the reduced output of the target stimulated light compensation light path of the substrate 102, which are reduced, and the substrate 102, and the laser light compensation light path of the substrate 102, which are provided by the substrate 102, and the simplified laser light compensation device 102, and the reduced by the reduced.
Alternatively, when the second compensation light is 0, that is, the compensation light laser 105 is , the compensation substrate 205 may be, but not limited to, blocks, the second wavelength conversion material 206 on the compensation substrate 205 is a wavelength conversion material corresponding to spectral bands, the wavelength conversion material 203 on the opaque substrate 201 may generally include a plurality of wavelength conversion materials arranged in different regions, the different wavelength conversion materials correspond to different spectral bands, each region is provided with a wavelength conversion material corresponding to spectral bands, and the wavelength conversion materials corresponding to the same spectral bands may be arranged in or more regions.
Optionally, when there are a plurality of second compensation lights, that is, a plurality of compensation light lasers 105, the wavelength conversion device 103 includes a plurality of compensation substrates 205, each of the compensation substrates 205 is provided with kinds of second wavelength conversion materials 206, different compensation substrates 205 are provided with different kinds of second wavelength conversion materials 206, and the second compensation lights include a plurality of timing lights, each of which corresponds to the second wavelength conversion material 206 . for example, if red light and green light are to be compensated, in possible implementations, the compensation light lasers 105 include a red light laser and a green light laser, the wavelength conversion device 103 includes 2 compensation substrates 205, pieces of compensation substrates 205 are provided with wavelength conversion materials of yellow light or red light, and another pieces of compensation substrates 205 are provided with wavelength conversion materials of green light, the second compensation lights include red light compensation lights emitted by the red light laser and green light compensation lights emitted by the green light laser, the red light compensation lights are red lights corresponding to the timing lights corresponding to the wavelength conversion materials of yellow light or red light, and the green light compensation lights corresponding to the timing lights corresponding to the wavelength conversion materials of green light.
Optionally, referring to the structural diagram of compensation substrates shown in fig. 6, the compensation substrate 205 includes a second transparent substrate 2051 and a film layer 2052, wherein the film layer 2052 is disposed between the second transparent substrate 2051 and the second wavelength conversion material 206, and the film layer 2052 is used for reflecting light that does not belong to the spectral band corresponding to the second compensation light or has an incident angle greater than a predetermined -th angular threshold, and transmitting light that is located in the spectral band and has an incident angle less than or equal to the -th angular threshold, because the incident angle of the second compensation light emitted by the compensation laser 105 is generally small and the incident angle of the wavelength-converted target laser light is generally large, the film layer 2052 can achieve transmission of the second compensation light and reflection of the target laser light.
Alternatively, the material of the second transparent substrate 2051 may include or more of glass, aluminum nitride, sapphire, aluminum oxide, and silicon nitride, so that the second transparent substrate 2051 has good thermal conductivity.
Specifically, the th film layer 2052 has spectral wavelength selective transmittance and angle selectivity, that is, reflects light with a large angle (greater than the th angle threshold) or not conforming to the spectral band, transmits light with a small angle (less than or equal to the th angle threshold) and conforming to the spectral band, the spectral band includes or more of 518-645 nm, 630-645nm and 460-470nm, wherein the 518-532nm corresponds to green compensation light, the 630-645nm corresponds to red compensation light, and 460-470nm corresponds to blue compensation light, the th angle threshold may be selected according to practical requirements, for example, the th angle threshold may be set to be 0 ° < th angle threshold ≦ 30 °.
In possible implementations, the second compensation light is red light (red compensation light), the film layer 2052 has high transmittance at 630-645nm and high reflectance at other wavelengths, in another possible implementations, the second compensation light is green light (green compensation light), the film layer 2052 has high transmittance at 518-532nm and high reflectance at other wavelengths, in yet another possible implementations, the second compensation light is blue light (blue compensation light), the film layer 2052 has high transmittance at 460-470nm and high reflectance at other wavelengths.
In possible embodiments, the film 2052 is further configured to transmit light having a polarization direction different from that of the second compensation light and reflect light having a polarization direction different from that of the second compensation light, an angle between the polarization direction corresponding to the film 2052 and the polarization direction of the second compensation light is smaller than a preset value, which may be set according to practical requirements and is not limited herein, for example, the preset value ranges from 1 ° to 10 °.
Optionally, as shown in fig. 6, an optical structure layer 2053 is further disposed between the film layer 2052 and the second wavelength conversion material 206, where the optical structure layer 2053 is configured to transmit the second compensation light and totally reflect the target stimulated light with an incident angle greater than a set second angle threshold.
Specifically, the second angle threshold is a critical angle at the time of total reflection, and the second angle threshold is related to the refractive index of the second wavelength conversion material 206 and the refractive index of the optical structure layer 2053. Specifically, if the refractive index of the second wavelength converting material 206 is recorded as n1The refractive index of the optical structure layer 2053 is denoted as n2Then the second angle threshold value thetacComprises the following steps:
Figure BDA0002252829640000181
the target received laser light with the incident angle larger than the second angle threshold value is totally reflected on the optical structure layer 2053 and does not enter the film layer 2052, so that the loss of the target received laser light in the film layer 2052 can be reduced, and the light extraction efficiency of the target received laser light is further improved .
Therefore, for part of target laser light entering the film layer 2052, after being reflected by the film layer 2052 back to the optical structure layer 2053, the part of target laser light will enter the second wavelength conversion material 206 with high refractive index from the optical structure layer 2053 with low refractive index, because the refraction angle of the light entering the high refractive index material from the low refractive index material is smaller than the incidence angle, the emergent light of the second wavelength conversion material 206 will be changed from large-angle light to small-angle light, which is more beneficial to the light collection and utilization of the optical element at the rear end.
In possible implementations, the optical structure layer 2053 includes a binder for bonding the second wavelength converting material 206 to the film layer 2052, the binder having a refractive index less than or equal to the refractive index of the second wavelength converting material 206.
, the adhesive can be provided with a plurality of particles for scattering light, and the particles can scatter the laser light of the target incident thereon, so that can further improve the light extraction efficiency of the laser light of the target.
Optionally, the material of the particles comprises or more of silicon dioxide, aluminum oxide, barium sulfate, silicon nitride, boron nitride and glass powder, the shape of the particles can be spherical and/or spheroidal (such as ellipsoid), the D50 particle diameter of the particles is smaller than a preset length, wherein D50 refers to the particle diameter corresponding to the cumulative particle size distribution percentage of the particles reaching 50%, the preset length can be set to be smaller than or equal to 1 μm, preferably, the preset length is equal to the wavelength of the second compensating light, and the maximum particle diameter of the particles is smaller than 20 μm, so that the scattering of the target excited light can be better realized.
In another possible implementation manners, the optical structure layer 2053 includes a porous structure composed of a plurality of particles, the particles are used for scattering light, and the gaps between the particles are used for total reflection of the target stimulated light with an incident angle larger than the second angle threshold and reduction of the light emitting angle of the second compensation light.
Optionally, as shown in fig. 6, a second film layer 2054 is further disposed on the side of the second transparent substrate 2051 away from the second wavelength conversion material 206, where the second film layer 2054 is used for antireflection of the second compensation light, that is, the second film layer 2054 is an antireflection film, and the wavelength conversion device further improves the transmittance of the second compensation light through the second film layer 2054, so that improves the light extraction efficiency of the light source.
The embodiment of the present invention further provides a specific implementation manner of laser fluorescent light sources, referring to a schematic structural diagram of another laser fluorescent light source shown in fig. 7, and compared with the laser fluorescent light source shown in fig. 4, the laser fluorescent light source further includes a lens 301, a second lens 302, and a light-homogenizing element 303 disposed between the excitation light laser 101 and the dichroic mirror 102, a third lens 304 disposed between the dichroic mirror 102 and the wavelength conversion device 103, a fourth lens 305 disposed between the wavelength conversion device 103 and the compensating light laser 105, and a filtering device 307 and a light guide 308 disposed on an output light path.
The implementation principle and the generated technical effect of the laser fluorescent light source shown in fig. 7 are similar to those of the laser fluorescent light source shown in fig. 4, and are not described herein again.
For ease of understanding, the laser fluorescence light source when the compensation region includes the compensation substrate and the wavelength conversion device further includes the second blank region for transmitting the excitation light will be specifically described below with reference to fig. 8 and 9.
Referring to fig. 8, a schematic structural diagram of another kinds of laser fluorescent light sources and a schematic structural diagram of another kinds of wavelength conversion devices are shown, the laser fluorescent light sources include a wavelength conversion device 103, an excitation light laser 101 and a compensation light laser 105 which are arranged on two sides of the wavelength conversion device 103, a dichroic mirror 102 is arranged between the excitation light laser 101 and the wavelength conversion device 103, a third dichroic mirror 107 is arranged between the wavelength conversion device 103 and the compensation light laser 105, a second light guide component 108 is arranged between the third dichroic mirror 107 and the dichroic mirror 102, the third dichroic mirror 107 is used for reflecting excitation light emitted by the excitation light laser 101 and transmitting second compensation light emitted by the compensation light laser 105, the second light guide component 108 is used for guiding the excitation light to the dichroic mirror 102, the wavelength conversion device 103 includes an opaque substrate 201, a compensation substrate 205 used for transmitting the compensation light, and a blank region 202 (i.e., the second blank region) used for transmitting the excitation light, a -th wavelength conversion material 203 not requiring the compensation light is arranged on the opaque substrate 201, the compensation substrate 205 is connected with the opaque substrate 205, and the second compensation material 206 is arranged on the opaque substrate 201.
Specifically, the excitation laser 101 may be a blue laser, the compensating laser 105 includes a red laser and/or a green laser, and the laser fluorescence light source is mainly used for compensating red light and/or green light, the blank region 202 may be a gap or a third transparent substrate connected to the opaque substrate 201, and a full-band antireflection film may be further disposed on the third transparent substrate, so as to improve the transmittance of the blank region 202 to the excitation light, thereby improving the light extraction efficiency of the laser fluorescence light source.
The working principle of the laser fluorescent light source is as shown in fig. 8, the excitation light (solid line) emitted by the excitation light laser 101 passes through the th dichroic mirror 102, the blank region 202 of the wavelength conversion device 103, the third dichroic mirror 107, the second light guide component 108 and the th dichroic mirror 102 in sequence and is output, the second compensation light (short dashed line) emitted by the compensation light laser 105 passes through the third dichroic mirror 107, the compensation substrate 205, the second wavelength conversion material 206 and the th dichroic mirror 102 in sequence and is output, the received laser light (long dashed line) generated by the wavelength conversion device 103 is reflected back to the th dichroic mirror 102 by the opaque substrate 201 and is output from the th dichroic mirror 102, so that the same optical path output of the target received laser light and the second compensation light is realized, and the output of the excitation light is not influenced.
In , the third dichroic mirror 107 is a long-wavelength pass dichroic mirror, the transmission wavelength band may include 630-645nm and/or 518-532nm, and the reflection wavelength band may include 440-470 nm.
In other possible embodiments, the excitation light has a polarization direction different from the polarization direction of the second compensation light, and the third dichroic mirror 107 is a spectral polarizing element corresponding to the polarization direction of the second compensation light.
For ease of understanding, the laser fluorescent light source in the case where the compensation region includes the th blank region and the compensation substrate will be described in detail with reference to fig. 1 and 9.
As shown in fig. 1 and 9, the laser fluorescence light source includes a wavelength conversion device 103, an excitation-light laser 101 and a compensation-light laser 105 disposed at two sides of the wavelength conversion device 103, a -th dichroic mirror 102 is disposed between the excitation-light laser 101 and the wavelength conversion device 103, a second dichroic mirror 104 is disposed between the wavelength conversion device 103 and the compensation-light laser 105, a -th light guide assembly 106 is disposed between the second dichroic mirror 104 and the -th dichroic mirror 102, the wavelength conversion device 103 includes an opaque substrate 201, and a compensation substrate 205 and a blank region 202 (i.e., the aforementioned blank region) for transmitting compensation light, a -th wavelength conversion material 203 which does not need compensation light is disposed on the opaque substrate 201, the compensation substrate 205 is connected with the opaque substrate 201, and a second wavelength conversion material 206 which needs compensation light is disposed on the compensation substrate 205.
The excitation laser 101 is a blue laser, and the compensation laser 105 includes a blue laser, and further includes a red laser and/or a green laser; the target compensation light emitted from the compensation light laser 105 includes blue compensation light, and red compensation light and/or green compensation light. For the detailed description of other devices, reference may be made to the corresponding contents of the foregoing embodiments, which are not described herein again.
The operation principle of the above-mentioned laser fluorescent light source is that as shown in fig. 1, blue excitation light (solid line) emitted by the excitation light laser 101 is output after passing through the th dichroic mirror 102, the blank region 202 of the wavelength conversion device 103, the second dichroic mirror 104, the th light guide assembly 106 and the th dichroic mirror 102 in sequence, and blue compensation light (short dashed line) emitted by the compensation light laser 105 is output after passing through the second dichroic mirror 104, the blank region 202 and the th dichroic mirror 102 in sequence, so that the same-path output of the blue excitation light and the blue compensation light is realized without separately adding a combined light path, and further, as shown in fig. 1, the blue excitation light (solid line) emitted by the excitation light laser 101 is incident on the second wavelength conversion material 206 of the wavelength conversion device 103 after passing through the th dichroic mirror 102, and the second wavelength conversion material 206 performs wavelength conversion on the blue excitation light to generate target compensated laser light, which is reflected back to the th dichroic mirror 102 by the compensation substrate 205 and then output from the th dichroic mirror 102, and red compensation light (short dashed line) emitted by the compensation light and/green compensation light and the red compensation light and the second wavelength conversion material are output from the combined light and the target compensated laser 205 without adding the combined light path.
In some possible embodiments , the wavelength of the blue excitation light emitted by the excitation light laser 101 is smaller than the wavelength of the blue compensation light, for example, the wavelength of the blue excitation light is 445nm or 455nm, the wavelength of the blue compensation light is 465nm, the dichroic mirror 102 may be a short-wavelength-pass dichroic mirror, the transmission wavelength band of the dichroic mirror 102 includes 440-.
In other possible embodiments, the wavelength of the blue excitation light emitted by the excitation light laser 101 is longer than the wavelength of the blue compensation light, for example, the wavelength of the blue excitation light is 465nm, the wavelength of the blue compensation light is 445nm or 455nm, the dichroic mirror 102 can be a multi-band dichroic mirror, the transmission band of the dichroic mirror 102 includes 460-.
In other possible embodiments, the polarization direction of the blue excitation light is different from the polarization direction of the target compensation light, the dichroic mirror 102 is a short-wavelength pass spectral polarization element aligned with the polarization direction of the blue excitation light, the wavelength of the blue excitation light is in its transmission band, and the target stimulated light is in its reflection band, the second dichroic mirror 104 is a spectral polarization element aligned with the polarization direction of the target compensation light.
The embodiment of the invention also provides projectors, and the projector comprises the laser fluorescent light source in the previous embodiment.
The implementation principle and the technical effect of the projector provided by the embodiment are the same as those of the embodiment of the laser fluorescent light source, and for the sake of brief description, reference may be made to the corresponding contents in the embodiment of the laser fluorescent light source for the part of the embodiment of the projector that is not mentioned.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that like reference numerals represent like items in the following figures, and thus once a item is defined in figures, it need not be further defined and explained by in subsequent figures.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the term "connected" shall be meaning, for example, it may be a fixed connection, a detachable connection, a body connection, or a direct connection or an indirect connection via an intermediate.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is only for convenience of describing the present invention and simplifying the description, but the terms "", "second", etc. are used for distinguishing the description and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (18)

  1. The laser fluorescent light source is characterized by comprising wavelength conversion equipment, an excitation light laser and a compensation light laser, wherein the excitation light laser and the compensation light laser are arranged on two sides of the wavelength conversion equipment;
    the th blank area is used for transmitting the exciting light emitted by the exciting light laser and transmitting the th compensating light emitted by the compensating light laser, the wavelength of the th compensating light is matched with that of the exciting light;
    the compensation substrate is used for reflecting target excited light obtained by wavelength conversion of the exciting light by the second wavelength conversion material and transmitting second compensation light emitted by the compensation light laser; the wavelength of the second compensation light is matched with the wavelength of the target stimulated light.
  2. 2. The laser fluorescence light source of claim 1, wherein an th dichroic mirror is disposed between the excitation light laser and the wavelength conversion device, and the th dichroic mirror is configured to transmit the excitation light and reflect excited light obtained by wavelength conversion of the excitation light by the wavelength conversion device and target compensation light emitted by the compensation light laser, or reflect the excitation light and transmit the excited light and the target compensation light, wherein the target compensation light comprises the th compensation light and/or the second compensation light.
  3. 3. The laser fluorescence light source of claim 2, wherein the stimulated light comprises a stimulated light obtained by wavelength conversion of the excitation light by the th wavelength conversion material, and when the compensation region comprises the compensation substrate, the stimulated light further comprises the target stimulated light.
  4. 4. A laser fluorescence light source according to claim 2, wherein the compensation region comprises the th blank region, the laser fluorescence light source further comprises a second dichroic mirror disposed between the wavelength conversion device and the compensation light laser and a th light guiding component disposed between the second dichroic mirror for reflecting the excitation light and transmitting the th compensation light, the th light guiding component for guiding the excitation light to the th dichroic mirror.
  5. 5. The laser fluorescence light source of claim 4, wherein the th blank area comprises a notch or th transparent substrate connected to the opaque substrate, the th transparent substrate is provided with a full-wave-band antireflection film, and the excitation light laser and the compensation light laser are both blue lasers.
  6. 6. The laser fluorescence light source of claim 5, wherein the excitation light laser emits blue excitation light having a wavelength different from that of the compensation light laser, and the dichroic mirror and the second dichroic mirror each include a dichroic element that employs wavelength splitting;
    alternatively, the first and second electrodes may be,
    the polarization direction of the blue excitation light is different from the polarization direction of the blue compensation light, the th dichroic mirror includes a dichroic element that employs wavelength division light and polarization division light, and the second dichroic mirror includes a dichroic element that employs polarization division light.
  7. 7. The laser fluorescence light source of claim 6, wherein the wavelength of the blue excitation light emitted from the excitation laser is smaller than that of the blue compensation light emitted from the compensation laser, the transmission band of the dichroic mirror comprises 440-460nm, the reflection band of the dichroic mirror comprises 460-760nm, the transmission band of the second dichroic mirror comprises 460-470nm, and the reflection band of the second dichroic mirror comprises 440-460 nm;
    alternatively, the first and second electrodes may be,
    the polarization direction of the blue excitation light is perpendicular to the polarization direction of the blue compensation light, the th dichroic mirror is a short-wave-pass spectral polarization element which is consistent with the polarization direction of the blue excitation light, the transmission band of the th dichroic mirror comprises 440-760 nm, the reflection band of the th dichroic mirror comprises 470-760nm, and the second dichroic mirror is a spectral polarization element which is consistent with the polarization direction of the blue compensation light.
  8. 8. The laser fluorescence light source of claim 2, wherein the compensation region comprises the compensation substrate, the dichroic mirror comprises a dichroic element for splitting light with wavelength, the compensation substrate comprises a second transparent substrate and a film layer, the film layer is disposed between the second transparent substrate and the second wavelength conversion material, and the film layer is used for reflecting light which does not belong to a spectral band corresponding to the second compensation light or has an incidence angle larger than a set angle threshold value and transmitting light which is located in the spectral band and has an incidence angle smaller than or equal to the angle threshold value.
  9. 9. The laser fluorescent light source of claim 8, wherein the second compensating light is polarized light, and wherein the film layer is further configured to transmit light having a polarization different from the polarization of the second compensating light and reflect light having a polarization different from the polarization of the second compensating light.
  10. 10. The laser fluorescent light source of claim 8, wherein the compensation substrate further comprises an optical structure layer disposed between the th film layer and the second wavelength conversion material, the optical structure layer being configured to totally reflect the target excited light having an incident angle greater than a set second angle threshold and to transmit the second compensation light.
  11. 11. The laser fluorescent light source of claim 8, wherein the compensation substrate further comprises a second film layer disposed on the side of the second transparent substrate away from the second wavelength converting material, the second film layer for anti-reflection of the second compensation light.
  12. 12. A laser fluorescence light source according to claim 8, wherein the excitation light laser is a blue laser, the wavelength conversion device further comprises a second blank region for transmitting blue excitation light emitted by the excitation light laser, the laser fluorescence light source further comprises a third dichroic mirror disposed between the wavelength conversion device and the compensation light laser, and a second light guiding component disposed between the third dichroic mirror and the dichroic mirror, the third dichroic mirror being configured to reflect the blue excitation light and transmit the second compensation light, and the second light guiding component being configured to guide the blue excitation light to the dichroic mirror.
  13. 13. The laser fluorescence light source of claim 12, wherein the third dichroic mirror is a long-wavelength pass dichroic mirror, or the polarization direction of the blue excitation light is different from the polarization direction of the second compensation light, and the third dichroic mirror is a spectral polarization element corresponding to the polarization direction of the second compensation light.
  14. 14. The laser fluorescent light source of claim 8, wherein the wavelength conversion device comprises a plurality of the compensation substrates and a plurality of the second wavelength conversion materials corresponding to the compensation substrate , and the second compensation light comprises a plurality of time-sequential lights corresponding to the second wavelength conversion material .
  15. 15. The laser fluorescent light source of claim 2, wherein when the compensation area includes the compensation substrate and the th blank area, the excitation laser is a blue laser, the compensation laser includes a blue laser, and further includes a red laser and/or a green laser;
    the laser fluorescence light source further comprises a second dichroic mirror and a light guide component, wherein the second dichroic mirror is arranged between the wavelength conversion device and the compensating light laser, the light guide component is arranged between the second dichroic mirror and the dichroic mirror, the second dichroic mirror is used for reflecting the excitation light and transmitting the target compensating light, and the light guide component is used for guiding the excitation light to the dichroic mirror.
  16. 16. The laser fluorescence light source of claim 15, wherein the wavelength of the blue excitation light emitted from the excitation light laser is smaller than the wavelength of the blue compensation light, the transmission band of the -th dichroic mirror comprises 440-460nm, the reflection band of the -th dichroic mirror comprises 460-470nm, and 630-645nm and/or 518-532nm, the transmission band of the second dichroic mirror comprises 460-470nm, and 630-645nm and/or 518-532nm, and the reflection band of the second dichroic mirror comprises 440-460 nm.
  17. 17. The laser fluorescent light source of any of claims 1-16, wherein the opaque substrate comprises or more metals, alloys and compounds having thermal conductivities greater than a set thermal conductivity threshold, and the compensating substrate comprises or more of aluminum nitride, glass, alumina, sapphire and silicon nitride.
  18. 18, projector, comprising the laser fluorescent light source of any of claims 1-17, .
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