CN111384668A - Laser light source module and laser projection system - Google Patents

Laser light source module and laser projection system Download PDF

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Publication number
CN111384668A
CN111384668A CN201811647998.9A CN201811647998A CN111384668A CN 111384668 A CN111384668 A CN 111384668A CN 201811647998 A CN201811647998 A CN 201811647998A CN 111384668 A CN111384668 A CN 111384668A
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laser
light source
source module
laser light
transmission
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杨兴
许礼强
王瑞
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TCL Corp
TCL Research America Inc
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TCL Research America Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0233—Mounting configuration of laser chips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0235—Method for mounting laser chips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/023—Mount members, e.g. sub-mount members
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Semiconductor Lasers (AREA)

Abstract

The invention discloses a laser light source module and a laser projection system, which comprise a laser array package and an optical filter, wherein the optical filter is correspondingly arranged on a light path of the laser array package, the laser array package comprises semiconductor lasers distributed in an array, the optical filter comprises an optical filtering functional area arranged corresponding to the semiconductor lasers, and the optical filtering functional area comprises a reflecting area and a transmission area which are arranged at intervals, so that the problem that the laser array package structure limits larger light spot gaps is solved, the internal structure of the laser light source module is simplified, and the difficulty of the subsequent assembly process is reduced.

Description

Laser light source module and laser projection system
Technical Field
The invention relates to the field of semiconductor lasers, in particular to a laser light source module and a laser projection system.
Background
With the continuous development of display technology, the demand of people for display equipment with high brightness, large color gamut and long service life is more and more urgent, and the laser display technology just corresponds to the pain point. The core light source of the laser display technology mostly adopts a semiconductor laser with the characteristics of high brightness, small volume, long service life, low cost, high reliability and the like, commonly called as a Laser Diode (LD). The current single semiconductor laser has low output power which is mostly between hundreds of milliwatts and a few watts due TO the technical level of semiconductors and the characteristics of materials, and the encapsulation of LD also adopts TO encapsulation. In order to meet the requirements of laser display products on high-power laser light sources, in practical application, a plurality of laser diodes are often packaged and arranged in an array, and high-power laser output is realized through beam combination.
At present, a common technical scheme is to package a plurality of LDs onto one module in an array, place the modules in a 90-degree manner with respect to the laser propagation direction, turn the light beam of one of the modules by using a plane mirror strip, and finally perform beam shrinkage by using a beam shrinkage system, so as to achieve the purpose of increasing the laser power density.
However, in the prior art, the beam characteristics of the semiconductor laser are not considered, the laser power density is simply improved through spatial arrangement, a large gap exists between light spots, the power density is low, the size is large, and the design of a whole system is not facilitated. Therefore, the prior art still needs to be improved and developed.
Disclosure of Invention
The invention aims to provide a laser light source module and a laser projection system, which can eliminate a large gap of light spots caused by the limitation of a laser array packaging structure.
The technical purpose of the invention is realized by the following technical scheme:
the utility model provides a laser light source module, wherein, laser instrument array package and light filter that includes, the light filter correspond set up in laser instrument array package's light path, laser instrument array package is including the semiconductor laser that the array was arranged, the light filter include with the light filtering function district that semiconductor laser corresponds the setting, light filtering function district is including the reflecting region and the transmission region that the interval set up.
The laser light source module, wherein, semiconductor laser includes the encapsulation casing, set up in semiconductor laser chip in the encapsulation casing and set up in the collimating lens of semiconductor laser chip front end, laser array encapsulation is including the semiconductor laser who is the rectangular array and arranges.
The laser light source module, wherein, semiconductor laser includes the monochromatic or different colour's of different wavelength semiconductor laser chip, the light filter is provided with the filtering function region of corresponding wavelength.
The laser source module, wherein, laser array encapsulation still includes the heat sink, semiconductor laser encapsulates in on the heat sink, the width of filtering function area is greater than the slow axis width of the semiconductor laser collimation facula.
The laser light source module, wherein, the light filter includes first light filtering face and second light filtering face, thereby it forms to plate the reflectance coating on the reflectance coating and plate the transmission coating on the transmission zone the first light filtering face, plate the transmission coating on the second light filtering face.
The laser light source module comprises a laser light source module, a light filter and a control module, wherein the light filter comprises a light filtering functional area, an adhesive layer and a substrate which are sequentially arranged, the light filtering functional area is a functional sheet, one surface of the functional sheet is bonded to the adhesive layer, and the other surface of the functional sheet is coated with a film; the transmission area is a transmission sheet with one surface plated with a transmission film, and the reflection area is a reflection sheet with one surface plated with a reflection film.
In the laser light source module, one surface of the substrate is bonded to the adhesive layer, and the other surface of the substrate is plated with the transmission film; the refractive index of the functional sheet is smaller than that of the adhesive layer, and the refractive index of the adhesive layer is smaller than that of the substrate.
The laser light source module further comprises at least two groups of laser array packages which are arranged in a staggered mode, and a preset package offset is arranged between every two groups of laser array packages; and the optical filters corresponding to each group of laser array packages are arranged in a staggered manner in the direction vertical to the laser array packages and have filtering offsets at preset intervals.
The laser light source module comprises at least four groups of laser array packages which are oppositely arranged, and the laser array packages are symmetrically arranged on two sides of the laser light source module.
A laser projection system comprises the laser light source module.
In summary, the invention eliminates the problem that the laser array packaging structure limits the larger light spot gap, simplifies the internal structure of the laser light source module and reduces the difficulty of the subsequent assembly process.
Drawings
Fig. 1 is a schematic structural diagram of a laser array package according to the present invention.
Fig. 2 is a schematic structural diagram of the optical filter in the first embodiment of the present invention.
Fig. 3 is a schematic view of the structure of the semiconductor laser in the present invention.
Fig. 4 is a schematic structural diagram of an optical filter according to a second embodiment of the present invention.
Fig. 5 is a schematic view of an overall structure of a laser light source module according to a third embodiment of the invention.
FIG. 6 is a schematic diagram of the optical path transmission of the laser light source module according to the present invention.
Fig. 7 is a schematic view of an overall structure of a laser light source module according to a fourth embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example (b): a laser light source module according to an embodiment of the present invention is shown in fig. 1 and 5, and includes a laser array package 100 and a light filter 200, where the light filter 200 is correspondingly disposed on a light path of the laser array package 100, the laser array package 100 includes a heat sink 110 and semiconductor lasers 120 arranged in an array and packaged on the heat sink 110, and as shown in fig. 2, the light filter 200 includes filter function regions disposed side by side, and the filter function regions include reflection regions 210 and transmission regions 220 disposed at intervals.
As shown in fig. 3, the semiconductor laser 120 includes a package housing 121, a semiconductor laser chip 122 disposed in the package housing 121, and a collimating lens 123 disposed at a front end of the semiconductor laser chip 122. The laser array package 100 includes semiconductor lasers 120 arranged in a rectangular array, and in this embodiment, the laser array package 100 includes 9 semiconductor lasers 120 arranged in a rectangular array. The width of the filtering function area is larger than the slow axis width of the collimated light spot of the semiconductor laser 120.
Specifically, the semiconductor laser is packaged by TO, and further comprises a resonant cavity. Meanwhile, the light emitting surface of a semiconductor laser chip (i.e., an LD chip) can be approximately regarded as a rectangular region, the long side of which is about several tens of micrometers and is called the slow axis direction, and the short side of which is about 1 micrometer and is called the fast axis direction. When the semiconductor laser works, the dimension of the short side direction is close to the laser wavelength, so that only one oscillation mode, namely a TEM (transverse electric and magnetic field) fundamental mode, exists in the fast axis direction of the laser; the dimension of the long side direction is dozens of microns, the laser has an oscillation mode in the slow axis direction, and a multimode Gaussian beam is output.
From the far field distribution of the semiconductor laser, the beam quality in the fast axis direction is good, the divergence angle is large and is between about 30 degrees and 60 degrees, the beam quality in the slow axis reverse direction is poor, the divergence angle is small and is between about 6 degrees and 10 degrees. Therefore, the light spot collimated by the collimating lens is an elliptical light spot, and the major axis is a and the minor axis is b.
Etendue (Etendue) is an important optical property in an optical system, and is used to characterize the light transmission capability of the optical system, and for a certain area of a surface light source, the light transmission capability can be described by the product of a spot area and a beam solid angle:
E＝n2∫∫cosθdAdΩ
where E denotes the etendue, n denotes the refractive index of the medium, θ denotes the beam divergence angle, dA denotes a bin, and d Ω denotes a solid angle corresponding to the bin. For ideal optical systems, etendue is a conservative quantity, whereas for non-ideal optical systems, etendue increases but not decreases.
For the laser light source module, because of the limitation of the packaging structure, laser array packaging (i.e. LD array) is adopted, i.e. semiconductor lasers are respectively arrayed along two vertical directions and packaged on a heat sink. Wherein, the output facula of laser array encapsulation is similar to a rectangle face light source, and to rectangle face light source, its optics expansion volume can change:
E＝πSsin2θmax
wherein S is the area of the rectangular light source, and theta max is the maximum divergence angle of the output light beam of the surface light source. Considering that the output beam of the semiconductor laser is a collimated beam after being collimated by the collimating lens, the far field divergence angle is small. Therefore, what significantly affects the optical expansion of the LD array is the area of the LD array.
By combining the above analysis, the essence of the laser light source module is to construct an effective optical system, and to reduce the optical expansion of the laser array package as much as possible. Theoretically, if the gap between the output light spots of the semiconductor laser (i.e. the output light spots of the LDs) can be completely eliminated, the minimum optical expansion of the LD array formed by the N LDs can be achieved
E0＝πabNsin2θmax
Wherein, a is the width of the long axis of the LD output light spot, b is the width of the short axis of the LD output light spot, N is the number of the LDs, and theta max is the maximum divergence angle of the LD output light beam. Based on the theory, the invention provides a new design method for eliminating the problem of virtual height of the optical expansion of the LD array caused by the clearance caused by the LD packaging structure.
The invention fully considers the spot characteristics of the semiconductor laser based on the theory of conservation of optical expansion, packages the LDs on the heat sink in an array manner and arranges the LDs in a staggered manner, adopts the optical filter to selectively reflect and transmit the laser beam emitted by each LD, and realizes the minimum output of the optical expansion. The design of the optical filter simplifies the structure of the light source module, reduces the volume of the light source module and simplifies the subsequent complex optical assembly and adjustment process.
In the first embodiment of the present invention, as shown in fig. 2, the optical filter 200 includes a first filter surface S1 and a second filter surface S2, the reflective region 210 is coated with a reflective film and the transmissive region 220 is coated with a transmissive film to form the first filter surface S1, and the second filter surface S2 is coated with a transmissive film.
Specifically, the optical filter 200 is a partitioned reflective transmissive optical filter, wherein the optical filter 200 includes a first light filtering surface S1 and a second light filtering surface S2, and the refractive index of the material of the optical filter 200 is n1The thickness of the filter 200 is d1. The first light filtering surface S1 has 7 regions, each region has a width larger than the slow axis width b of the collimated light spot of the semiconductor laser, and the 7 regions are the transmission region 220 and the reflection region 210 which are arranged at intervals.
The filter specifically includes a first transmission region 221, a second transmission region 222, a third transmission region 223 and a fourth transmission region 224, the transmission regions 220 are all coated with transmission films corresponding to laser wavelengths, the second filter surface S2 is also coated with transmission films corresponding to laser wavelengths, the incident angle of the transmission films is 45 degrees, and the transmission films are preferably single-wavelength dielectric films with high reflectivity.
The reflection region 210 includes a first reflection region 211, a second reflection region 212, and a third reflection region 213 respectively disposed between the transmission regions 220, the reflection region 210 is coated with a reflection film corresponding to the laser wavelength, the incident angle of the reflection film is 45 degrees, and the reflection film is preferably a single-wavelength dielectric reflection film with substantially high reflectivity.
In the second embodiment of the present invention, the structure of the filter is different from that of the filter in the first embodiment.
As shown in fig. 4, the optical filter 200 includes a filter function region, an adhesive layer 240 and a substrate 250, which are sequentially disposed, the filter function region is a function sheet 230, one surface of the function sheet 230 is bonded to the adhesive layer 240, and the other surface of the function sheet 230 is coated with a film; the transmission region is a transmission sheet 232 with one surface plated with a transmission film, and the reflection region is a reflection sheet 231 with one surface plated with a reflection film.
One surface of the substrate 250 is bonded to the glue layer 240, and the other surface of the substrate 250 is plated with a transmission film; the refractive index of the functional sheet 230 is smaller than that of the adhesive layer 240, and the refractive index of the adhesive layer 240 is smaller than that of the substrate 250.
Specifically, the optical filter 200 is a partitioned reflective transmissive optical filter, the optical filter 200 includes a first light filtering surface S1 and a second light filtering surface S2, and further includes a light filtering functional region, an adhesive layer 240 and a substrate 250 which are spliced by gluing, and the thicknesses of the light filtering functional region, the adhesive layer 240 and the substrate 250 are d2、d3And d4The refractive indexes of the light filtering functional region, the adhesive layer 240 and the substrate 250 are n respectively2、n3、n4Wherein the refractive index satisfies n2＜n3＜n4。
Preferably, the refractive index of the glue layer 240 is set as:
Figure BDA0001932396900000081
preferably, the light filtering function region includes 7 function plates 230, each function plate 230 is spliced to form the light filtering function region, each function plate 230 includes a transmission plate 232 and a reflection plate 231 which are arranged at intervals, the transmission plate 232 is plated with a transmission film, and the reflection plate 231 is plated with a reflection film.
The transmissive plate 232 includes a first transmissive plate 2321, a second transmissive plate 2322, a third transmissive plate 2323 and a fourth transmissive plate 2324, each transmissive plate 232 is coated with a transmissive film corresponding to a laser wavelength, and the second filter surface S2 is also coated with a transmissive film. The incident angle of the transmission film is 45 degrees, and the transmission film is preferably a single-wavelength dielectric film with high reflectivity.
The reflective sheets 231 are disposed between the transmissive sheets 232, each of the reflective sheets 231 specifically includes a first reflective sheet 2311, a second reflective sheet 2312 and a third reflective sheet 2313, each of the reflective sheets 231 is plated with a reflective film, an incident angle of the reflective film is 45 degrees, and the reflective film is preferably a single-wavelength dielectric reflective film with a very high reflectivity.
Compared with the first embodiment of the invention, each functional sheet and the substrate in the second embodiment only need to be coated on one side, and the non-coated sides are formed by gluing and splicing shadowless glue (ultraviolet glue), so that the transmission film and the reflection film can transmit ultraviolet light to facilitate ultraviolet curing during gluing of the shadowless glue.
As shown in fig. 5, fig. 5 is a sub-module of the laser light source module, the sub-module includes a laser array package 100 and three optical filters 200 arranged in a staggered manner, the laser array package includes 9 semiconductor lasers 120, the 9 semiconductor lasers 120 are distributed in an array, and form a 3 × 3 array and are packaged on the same heat sink 110, so as to form the laser array package 100.
Specifically, as shown in fig. 5 and fig. 6, a three-dimensional coordinate system is first established, and it is assumed that the laser array package 100 of the present invention is located in the coordinate system, the slow axis direction of the semiconductor laser 120 is parallel to the x-axis direction, the fast axis direction of the semiconductor laser 120 is parallel to the y-axis direction, and the laser output direction of the semiconductor laser 120 is parallel to the z-axis direction. The laser output surface of the laser array package 100 is defined as P1, and the pitch between the semiconductor lasers 120 is L ═ a + Δ y, where a is the long-axis width of the LD output spot and Δ y is the pitch of the LD output spot.
The length direction of the optical filter 200 is parallel to the x-axis direction, the angle between the optical filter 200 and the laser array package 100 is 45 degrees, and the reflection region 210 of each optical filter 200 corresponds to each semiconductor laser 120 on the laser array package 100 in the z-axis direction. The three filters 200 are sequentially arranged in a stepped and staggered manner in the z-axis direction, and the height difference of each filter 200 is a + Δ y'.
Thus, the laser beam output by the laser array package 100 is filtered by the filter 200 and projected onto the output face of the sub-module, which is defined as P2. The y-axis spot gap on the output surface P2 of the submodule is reduced to Δ y' from the original LD output spot spacing. The magnitude of Δ y 'depends on the far-field divergence angle of the LD collimated beam and the assembly tolerance of the filter, and in practical applications, Δ y' cannot be completely zero.
In a third embodiment of the present invention, as shown in fig. 5, the laser light source module further includes at least two groups of laser array packages 100 arranged in a staggered manner, and a predetermined package offset is set between each group of laser array packages 100; the optical filters 200 corresponding to each group of the laser array packages 100 are arranged in a staggered manner in a direction perpendicular to the laser array packages 100, and have filter offsets at predetermined intervals.
Specifically, two sub-modules are spliced in the y-axis direction, and are dislocated in the x-axis direction by a distance of Δ x ', so that the output beam of the next sub-module just corresponds to the transmission region of the optical filter of the previous sub-module, wherein Δ x' is the preset packaging offset. When the light beam passes through the filter, the light beam is laterally shifted as known from Snell's Law.
If the filter of the first embodiment is used, the lateral offset is:
Figure BDA0001932396900000101
if the filter in the second embodiment is used, the lateral offset is:
Figure BDA0001932396900000102
therefore, the sub-module partitioned reflective and transmissive filter set in the following is higher than the sub-module partitioned reflective and transmissive filter set in the preceding by Δ d or Δ d 'in the z-axis direction to ensure the consistency of the output light spots, where Δ d or Δ d' is the filter offset of the predetermined interval.
Because the offset of delta x 'is arranged between the two sub-modules, the light beams of the two sub-modules are inserted between the partitioned reflection transmission type filter sets of the rear sub-module, and the size of the delta x' needs to satisfy the following relation:
Figure BDA0001932396900000103
where M is the number of sub-modules, as one aspect of the present invention, the number of sub-modules is not limited to 2, and the number of sub-modules is preferably 2 to 3 in order to ensure sufficient optical transmission efficiency.
As an aspect of the invention, in the previous sub-module, the filters may be replaced with ordinary mirrors of the same size. If the number of the sub-modules is more than 2, the partitioned reflective and transmissive filter set of the sub-module farthest from the output surface of the module can be replaced by a common reflector set with the same size. The common reflector group is preferably a single-wavelength dielectric film reflecting film with higher optical efficiency.
The semiconductor laser comprises conductor laser chips with different wavelengths and different colors, and preferably, the semiconductor laser chips are single-color, double-color or three-color. The optical filter is provided with a filtering function area corresponding to the wavelength.
Specifically, semiconductor laser includes the double-colored or three-colour laser of RGB of different wavelength, and through setting up the coating film that subregion reflection transmission type light filter corresponds the function piece to, realize the double-colored or three-colour laser light source module of RGB under the condition that does not change the infrastructure, the laser light source module expansibility is stronger, and the modularization degree is higher. Meanwhile, the semiconductor laser with the divergence angle as large as possible is selected and arranged on the sub-module close to the output surface of the laser light source module, so that the energy loss caused by the reduction of the coupling efficiency of the subsequent optical system due to the overlong optical path is reduced.
In a fourth embodiment of the present invention, as shown in fig. 7, the laser light source module further includes at least four sets of laser array packages 100 disposed oppositely, and the laser array packages 100 on two sides are symmetrically arranged.
Specifically, the laser light source modules in the first embodiment of the present invention are rotated by 180 degrees, and then the two laser light source modules are symmetrically arranged to obtain a laser light source module with double-sided arrangement.
The invention also provides a laser projection system, which comprises the laser light source module; as described above.
In conclusion, the invention has the following beneficial effects:
firstly, based on the theory of optical expansion, the light emitting characteristic of the semiconductor laser is fully considered, the problem of large light spot gap caused by the limitation of a laser array packaging structure is solved through the staggered arrangement of laser array packaging and the optical filter, and the minimized output of the optical expansion is realized.
Secondly, the filter adopts the design of subregion reflection transmission-type filter, has simplified the inside structure of laser source module for the structure is compacter, has reduced follow-up installation and debugging technology degree of difficulty, has better manufacturability.
Third, the filter still can adopt the subregion reflection transmission type filter design of veneer concatenation mode, under the condition that does not change the infrastructure, has realized RGB double-colored or three-colour laser light source module, and laser light source module expansibility is stronger, and the modularization degree is high.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a laser light source module, characterized by: the laser array package and the light filter that include, the light filter correspond set up in laser array package's light path, laser array package is including the semiconductor laser that the array was arranged, the light filter include with the filtering function district that semiconductor laser corresponds the setting, filtering function district is including the reflecting region and the transmission region that the interval set up.
2. The laser light source module as set forth in claim 1, wherein: the semiconductor laser comprises a packaging shell, a semiconductor laser chip arranged in the packaging shell and a collimating lens arranged at the front end of the semiconductor laser chip, and the laser array package comprises semiconductor lasers arranged in a rectangular array.
3. The laser light source module as set forth in claim 2, wherein: the semiconductor laser comprises single-color or different-color semiconductor laser chips with different wavelengths, and the optical filter is provided with a filtering function area corresponding to the wavelength.
4. The laser light source module as set forth in claim 1, wherein: the laser array package also comprises a heat sink, the semiconductor laser is packaged on the heat sink, and the width of the light filtering functional area is larger than the width of a slow axis of a collimation light spot of the semiconductor laser.
5. The laser light source module as set forth in claim 1, wherein: the optical filter comprises a first optical filtering surface and a second optical filtering surface, a reflecting film is plated on the reflecting area, a transmission film is plated on the transmission area, and therefore the first optical filtering surface is formed, and the transmission film is plated on the second optical filtering surface.
6. The laser light source module as set forth in claim 1, wherein: the optical filter comprises a light filtering functional area, an adhesive layer and a substrate which are sequentially arranged, wherein the light filtering functional area is a functional sheet, one surface of the functional sheet is bonded to the adhesive layer, and the other surface of the functional sheet is coated with a film; the transmission area is a transmission sheet with one surface plated with a transmission film, and the reflection area is a reflection sheet with one surface plated with a reflection film.
7. The laser light source module as set forth in claim 6, wherein: one surface of the substrate is bonded to the adhesive layer, and the other surface of the substrate is plated with a transmission film; the refractive index of the functional sheet is smaller than that of the adhesive layer, and the refractive index of the adhesive layer is smaller than that of the substrate.
8. The laser light source module as set forth in claim 1, wherein: the laser light source module also comprises at least two groups of laser array packages which are arranged in a staggered manner, and a preset package offset is arranged between every two groups of laser array packages; and the optical filters corresponding to each group of laser array packages are arranged in a staggered manner in the direction vertical to the laser array packages and have filtering offsets at preset intervals.
9. The laser light source module as set forth in claim 1, wherein: the laser light source module further comprises at least four groups of laser array packages which are oppositely arranged, and the laser array packages on two sides are symmetrically arranged.
10. A laser projection system, characterized by: comprising a laser light source module according to any one of claims 1 to 9.
CN201811647998.9A 2018-12-29 2018-12-29 Laser light source module and laser projection system Pending CN111384668A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115343902A (en) * 2021-05-12 2022-11-15 中强光电股份有限公司 Illumination system and projection device

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