CN108196417A - A kind of wheeled projector of two-color laser fluorescence and its control method - Google Patents
A kind of wheeled projector of two-color laser fluorescence and its control method Download PDFInfo
- Publication number
- CN108196417A CN108196417A CN201611121051.5A CN201611121051A CN108196417A CN 108196417 A CN108196417 A CN 108196417A CN 201611121051 A CN201611121051 A CN 201611121051A CN 108196417 A CN108196417 A CN 108196417A
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- laser
- light
- fluorescent wheel
- fluorescence
- blue
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Classifications
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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
-
- 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
Abstract
The invention discloses a kind of wheeled projector of two-color laser fluorescence and its control methods, including two laser emitters and fluorescent wheel, two laser emitters send out the luminous point that laser irradiation is formed on fluorescent wheel and overlap, fluorescent wheel at the uniform velocity rotates, Laser Power Devices are in one cycle according to certain duty ratio, successively driving current is provided to blue laser and red laser respectively, feux rouges is all through fluorescent wheel, and blue laser then partly penetrates fluorescent wheel, another part gets to fluorescence on fluorescent powder and generates wide spectrum green light.The blue light and feux rouges of transmission are directional light by lens group collimation, and the wide spectrum wide angle green light of fluorescence is equally collected by lens group and is shaped as the directional light of certain spot size, after light splitting piece, three coloured light, which is realized, closes beam, and inject the microprism system of projection lens, color matching frame out is imaged on projection screen, and increased red laser makes the red contrast of image and color saturation higher.
Description
Technical field
The invention belongs to fluorescence type field of projector, and in particular to a kind of wheeled projector of two-color laser fluorescence and its control
Method.
Background technology
Projector is broadly divided into light bulb, LED and laser three types according to light source difference, and wherein laser projection is current
State-of-the-art shadow casting technique, and the laser projection of fluorescence wheel mode is the highest type of cost performance.For traditional fluorescence light
Road is irradiated to part blue laser on fluorescent powder, generates the light of yellow and green wavelength, and feux rouges and green is generated using filtering
Light, the light of blue laser composition three primary colours generated with another part transmitted light path, needs are generated by the proportioning to three primary colours
Color, generate the picture of needs, project on curtain.
The scheme of traditional blue laser excitated fluorescent powder, due to the limitation of phosphor material powder in itself, fluorescence spectrum
Wavelength is largely focused between 500-600nm, and only seldom optical wavelength is filtered out after optical filter in more than 600nm
Feux rouges accounting it is just considerably less, the red performance for the picture being projected out is simultaneously bad.
Invention content
The technical problems to be solved by the invention are：A kind of wheeled projector of two-color laser fluorescence and its controlling party are provided
Method solves the problems, such as to cause the performance of projected picture red bad in the prior art.
The present invention uses following technical scheme to solve above-mentioned technical problem：
A kind of wheeled projector of two-color laser fluorescence, including two laser emitters and fluorescent wheel, two laser emitters
It sends out the luminous point that laser irradiation is formed on fluorescent wheel to overlap, fluorescent wheel at the uniform velocity rotates, and two laser emitters work alternatively, glimmering
Halo inspires yellow fluorescence, green fluorescence, with all carrying out conjunction beam in light-emitting window through the blue laser of fluorescent wheel, is mixed into
White light.
Two light splitting pieces, a condenser lens, a collimation lens are set between laser emitter and fluorescent wheel, wherein,
Directly by reaching fluorescent wheel after light splitting piece, condenser lens, collimation lens, another swashs the laser that one laser emitter is sent out
The back side that the laser that optical transmitting set is sent out reflexes to first light splitting piece through total reflection mirror reflexes to second light splitting piece again, then according to
It is secondary by reaching fluorescent wheel after condenser lens and collimation lens, it is anti-that laser beats the yellow inspired on fluorescent wheel, green fluorescence
Second light splitting piece is reached to by collimation lens, condenser lens, is all-trans through the second light splitting piece back side and is incident upon light-emitting window；Blue
Laser all through fluorescent wheel after, continue through next stage collimation lens, condenser lens, it is then anti-using three total reflection mirrors
Light-emitting window is reached by second light splitting piece after penetrating, conjunction beam is carried out with yellow, green fluorescence, is mixed into white light.
The fluorescent wheel includes round heat-radiating substrate and is set to the circular ring shape phosphor region at heat-radiating substrate edge, the fluorescence
Area includes blue light transmission area, red transmission area and green-emitting fluorescent area.
Signal hair is respectively provided between red transmission area and green-emitting fluorescent area and between red transmission area and blue light transmission area
In fluorescent wheel rotary course, the control letter of laser emitter is sent out when laser spot passes through the sender unit for injection device
Number.
Light splitting piece is in 45 degree of angles, and be coated with yellow, green light total reflection film with incident light direction.
Two laser emitters are respectively blue laser and red laser.
A kind of control method of the wheeled projector of two-color laser fluorescence, in a swing circle of fluorescent wheel, including such as
Lower step：
First, the laser spot that two laser emitters of adjusting are sent out overlaps the fluorescence area in fluorescent wheel；
Secondly, control fluorescent wheel at the uniform velocity rotates, and obtains the fluorescence area information that laser spot passes through in real time；
Then, laser spot is waited for trigger the device by sender unit and send out transmitting signal；
Finally, after receiving transmitting signal, according to laser spot by the suitable of emitter previous moment and later moment in time
Sequence, cycle send out the control signal of two laser emitters.
The control signal of two laser emitters is sent out according to following rule：
Judge the fluorescence area that laser spot passes through by the previous moment and later moment in time of sender unit,
If previous moment is red transmission area, later moment in time is green-emitting fluorescent area, then sends out red laser and stop, is blue
The signal that color laser is opened；
If previous moment is blue light transmission area, later moment in time is red transmission area, then sends out red laser and open, is blue
The signal that color laser stops；
If previous moment is red transmission area, later moment in time is blue light transmission area, then sends out red laser and stop, is blue
The signal that color laser is opened；
If previous moment is green-emitting fluorescent area, later moment in time is red transmission area, then sends out red laser and open, is blue
The signal that color laser stops.
Compared with prior art, the invention has the advantages that：
The present invention is directed to this bad defect of fluorescence light path red color saturation degree, in blue laser excitated fluorescent powder
Red laser is added on the basis of light path.And fluorescent wheel is divided into three areas according to angle proportioning, respectively blue light and feux rouges is saturating
Penetrate area and green-emitting fluorescent area.Laser Power Devices in one cycle according to certain duty ratio, successively respectively to blue laser and
Red laser provides driving current, and feux rouges is all through fluorescent wheel, and blue laser is then partly through fluorescent wheel, another part
It gets to fluorescence on fluorescent powder and generates wide spectrum green light.The blue light and feux rouges of transmission are directional light by lens group collimation, and fluorescence
Wide spectrum wide angle green light is equally collected by lens group and is shaped as the directional light of certain spot size, after light splitting piece, three
Coloured light, which is realized, closes beam, and inject the microprism system of projection lens, and color matching frame out is imaged on projection screen, increased feux rouges
Laser makes the red contrast of image and color saturation higher.
Description of the drawings
Fig. 1 is that the light path of projector of the present invention moves towards schematic diagram.
Fig. 2 is the structure diagram of fluorescent wheel of the present invention.
Fig. 3 is the structure diagram of laser projection of the present invention.
Wherein, being identified as in figure：1- blue lasers；The second light splitting pieces of 2-；The first condenser lenses of 3-；4- first is collimated
Lens；5- fluorescent wheels；6- motors；The second collimation lenses of 7-；The second condenser lenses of 8-；The first total reflection mirrors of 9-；10- second is all-trans
Penetrate mirror；11- third collimation lenses；12- third total reflection mirrors；13- red transmissions area；14- blue light transmission areas；15- green-emitting fluorescents
Area；The 4th total reflection mirrors of 16-；The first light splitting pieces of 17-；18- red lasers.
Specific embodiment
The structure and the course of work of the present invention are described further below in conjunction with the accompanying drawings.
A kind of wheeled projector of two-color laser fluorescence, including two laser emitters and fluorescent wheel, two laser emitters
It sends out the luminous point that laser irradiation is formed on fluorescent wheel to overlap, fluorescent wheel at the uniform velocity rotates, and two laser emitters work alternatively, glimmering
Halo inspires yellow fluorescence, green fluorescence, with all carrying out conjunction beam in light-emitting window through the blue laser of fluorescent wheel, is mixed into
White light.
A kind of control method of the wheeled projector of two-color laser fluorescence, in a swing circle of fluorescent wheel, including such as
Lower step：
First, the laser spot that two laser emitters of adjusting are sent out overlaps the fluorescence area in fluorescent wheel；
Secondly, control fluorescent wheel at the uniform velocity rotates, and obtains the fluorescence area information that laser spot passes through in real time；
Then, laser spot is waited for trigger the device by sender unit and send out transmitting signal；
Finally, after receiving transmitting signal, according to laser spot by the suitable of emitter previous moment and later moment in time
Sequence, cycle send out the control signal of two laser emitters.
Specific embodiment one,
As shown in Figure 1, Figure 2, Figure 3 shows,
A kind of wheeled projector of two-color laser fluorescence, it is saturating including two laser emitters, two light splitting pieces, three collimations
Mirror, two condenser lenses, four total reflection mirrors, fluorescent wheel 5, two laser emitters are respectively that blue laser 1 and feux rouges swash
Light device 18, two light splitting pieces are respectively first, second light splitting piece, three collimation lenses be respectively first to third collimation lens,
Two condenser lenses are respectively first, second condenser lens, and four total reflection mirrors are respectively first to fourth total reflection mirror, blue
It is accurate to set gradually the first light splitting piece 17, the second light splitting piece 2, the first condenser lens 3, first for setting between laser 1 and fluorescent wheel 5
Straight lens 4, the laser that blue laser 1 is sent out directly by the first light splitting piece 17, the second light splitting piece 2, the first condenser lens 3,
Fluorescent wheel 5 is reached after first collimation lens 4, the laser that red laser 18 is sent out reflexes to first by the 4th total reflection mirror 16
After the back side of light splitting piece 17 is totally reflected, then, collimated successively by the second light splitting piece 2, the first condenser lens 3, first saturating
Fluorescent wheel 5 is reached after mirror 4, the laser spot that blue laser 1 and red laser 18 generate on fluorescent wheel 5 overlaps, motor 6
Drive fluorescent wheel 5 at the uniform velocity rotate, laser beat the yellow inspired on fluorescent wheel 5, green fluorescence back through collimation lens, gather
Focus lens reach second light splitting piece 2, are all-trans through second 2 back side of light splitting piece and are incident upon light-emitting window；Blue laser is all through glimmering
After halo, continue successively through the second collimation lens 7, the second condenser lens 8, the first total reflection mirror 9, the second total reflection mirror 10, the
Three collimation lenses 11, third total reflection mirror 12 reach the second light splitting piece 2, across the second light splitting piece 2 after reach light-emitting window, with Huang
Color, green fluorescence carry out conjunction beam, are mixed into white light.
Two laser emitters send out the luminous point that laser irradiation is formed on fluorescent wheel and overlap, and fluorescent wheel at the uniform velocity rotates, and two
A laser emitter works alternatively, and fluorescent wheel inspires yellow fluorescence, green fluorescence, and all through the blue laser of fluorescent wheel
Conjunction beam is carried out in light-emitting window, is mixed into white light.1- blue lasers；The second light splitting pieces of 2-；The first condenser lenses of 3-；4- first
Collimation lens；5- fluorescent wheels；6- motors；The second collimation lenses of 7-；The second condenser lenses of 8-；The first total reflection mirrors of 9-；10- second
Total reflection mirror；11- third collimation lenses；12- third total reflection mirrors；13- red transmissions area；14- blue light transmission areas；15- green lights
Phosphor region；The 4th total reflection mirrors of 16-；The first light splitting pieces of 17-；18- red lasers.
The fluorescent wheel 5 includes round heat-radiating substrate and is set to the circular ring shape phosphor region at heat-radiating substrate edge, described glimmering
Light area includes blue light transmission area 14, red transmission area 13 and green-emitting fluorescent area 15.
It is all provided between red transmission area 13 and green-emitting fluorescent area 15 and between red transmission area 13 and blue light transmission area 14
It puts sender unit, in 5 rotary course of fluorescent wheel, laser emitter is sent out when laser spot passes through the sender unit
Control signal.
Light splitting piece is in 45 degree of angles, and be coated with yellow, green light total reflection film with incident light direction.
Specific embodiment two,
A kind of control method of the wheeled projector of two-color laser fluorescence, in a swing circle of fluorescent wheel, including such as
Lower step：
The laser spot that two step 1, adjusting laser emitters are sent out overlaps the fluorescence area in fluorescent wheel；
Step 2, control fluorescent wheel at the uniform velocity rotate, and obtain the fluorescence area information that laser spot passes through in real time；
Step 3 waits for laser spot to trigger the device by sender unit and send out transmitting signal；
Step 4, after receiving transmitting signal, according to laser spot by the suitable of emitter previous moment and later moment in time
Sequence, cycle send out the control signal of two laser emitters；
The control signal of two laser emitters is sent out according to following rule：
Judge the fluorescence area that laser spot passes through by the previous moment and later moment in time of sender unit,
If previous moment is red transmission area, later moment in time is green-emitting fluorescent area, then sends out red laser and stop, is blue
The signal that color laser is opened；
If previous moment is blue light transmission area, later moment in time is red transmission area, then sends out red laser and open, is blue
The signal that color laser stops；
If previous moment is red transmission area, later moment in time is blue light transmission area, then sends out red laser and stop, is blue
The signal that color laser is opened；
If previous moment is green-emitting fluorescent area, later moment in time is red transmission area, then sends out red laser and open, is blue
The signal that color laser stops.
The operation principle of the present invention is as follows：
Laser Power Devices according to certain duty ratio, give blue laser and red laser respectively successively in one cycle
Driving current and light extraction are provided, blue and red laser after colimated light system, become directional light, directional light through light splitting piece
After condenser lens, blue and red laser beam are focused into a hot spot, beat on fluorescent wheel, and fluorescent wheel is according to angle
Proportioning is divided into three areas, respectively blue light, red transmission area and green-emitting fluorescent area.Fluorescent wheel rotates under the driving of motor,
In one swing circle, when feux rouges is emitted, the region for getting to fluorescent wheel is red transmission area, when blue light is emitted, is got to glimmering
Region on halo is blue light transmission area and green light fluorescent powder area, and some blue light penetrates fluorescent wheel, and some blue light fluorescence goes out green light.
And the wide spectrum green light of fluorescence is reflected away by fluorescent wheel, negative direction penetrates focus lens group, and negative direction passes through condenser lens
The wide angle of divergence green light of wide spectrum is shaped as the directional light of certain spot size.
As shown in Fig. 2, fluorescent wheel includes：Red transmission area, incident red laser whole transmissive；Blue light transmits
Area, incident blue laser whole transmissive；Green-emitting fluorescent area, incident blue laser fluorescence in this region go out wide spectrum
Green, and the exit direction of green light is distributed in lambert's body.
Laser Power Devices according to certain duty ratio, give blue laser and red laser respectively successively in one cycle
Driving current and light extraction are provided, 45 degree of angle directive speculums of red laser are deflected 90 degree of outgoing, and 45 degree of angles are by the first light splitting
It after piece, is turn 90 degrees by the first light splitting piece, is emitted to right front partially.It is converged after the first light splitting piece of blue laser directive with red laser
It closes, the feux rouges and blue light after converging after colimated light system, become directional light, directional light is through focusing through the second light splitting piece
After lens, blue and red laser beam are focused into a hot spot, beat on fluorescent wheel, and fluorescent wheel is divided into according to angle proportioning
Three areas, respectively blue light, red transmission area and green-emitting fluorescent area.Fluorescent wheel rotates under the driving of motor, in a rotation
In period, when feux rouges is emitted, the region for getting to fluorescent wheel is red transmission area, when blue light is emitted, is got on fluorescent wheel
Region is blue light transmission area and green-emitting fluorescent area, and some blue light penetrates fluorescent wheel, and some blue light fluorescence goes out green light.Green light is reflected
And it reverses through condenser lens, is collimated, is propagated forward with certain dispersion angle for the first time, by after reversed directive collimation lens
Secondary collimation, yellow light and green light become directional light after collimating twice.Green directional light with 45 degree of second light splitting pieces of angle directive,
It is totally reflected and is emitted along the Y direction.The blue light and feux rouges of transmission are collimated into directional light, directional light after transparent group of collimation
Distinguish directive total reflection mirror with 45 degree of angles, exit direction becomes the propagation of X negative directions, and (i.e. third collimates by relaying collimation lens
Lens) degree of parallelism is corrected after, directive total reflection mirror, exit direction is turn 90 degrees partially, along Y positive directions propagate, with 45 degree of angles
After full impregnated crosses the second light splitting piece, converge with green light, generate mixed white light.
The specification of each component of the present invention, function and effect are as follows：
Blue laser：Wavelength 455nm.
Red laser：Wavelength 638nm.
Light splitting piece：45 degree of incident blue lasers can be totally reflected with full impregnated mistake, yellow and green laser.
Condenser lens：The directional light of reversed incidence is shaped as a certain size hot spot, by the diverging finishing of forward entrance
Shape is directional light.
Collimation lens：The directional light of forward entrance is shaped as to a certain size hot spot, incident diverging finishing will be reflected
Shape is directional light.
Fluorescent wheel：Feux rouges all penetrates, and incident blue laser part whole transmissive, part fluorescence goes out green light.
Motor：Rotate fluorescent wheel.
Total reflection mirror：420~700nm wave bands plate 45 degree of angle total reflection films, and 45 degree of incident light are turn 90 degrees outgoing partially.
Red transmission area：Plate anti-reflection film (600~700nm).
Blue light transmission area：Plate anti-reflection film (420~500nm).
Green fluorescence area：The laser fluorescence of incident 455nm generates green light.
Claims (8)
1. a kind of wheeled projector of two-color laser fluorescence, it is characterised in that：Including two laser emitters and fluorescent wheel, two are swashed
Optical transmitting set sends out the luminous point that laser irradiation is formed on fluorescent wheel and overlaps, and fluorescent wheel at the uniform velocity rotates, and two laser emitters are handed over
Temporary substitute is made, and fluorescent wheel inspires yellow fluorescence, green fluorescence, closed with the blue laser all through fluorescent wheel in light-emitting window
Beam is mixed into white light.
2. the wheeled projector of two-color laser fluorescence according to claim 1, it is characterised in that：Laser emitter and fluorescent wheel
Between setting two light splitting pieces, a condenser lens, a collimation lens, wherein, the laser that a laser emitter is sent out is straight
Fluorescent wheel was reached after connecting light splitting piece, condenser lens, collimation lens, the laser that another laser emitter is sent out is through total reflection
The back side that mirror reflexes to first light splitting piece reflexes to second light splitting piece again, then after passing sequentially through condenser lens and collimation lens
Fluorescent wheel is reached, laser beats the yellow inspired on fluorescent wheel, green fluorescence is reached back through collimation lens, condenser lens
Second light splitting piece is all-trans through the second light splitting piece back side and is incident upon light-emitting window；Blue laser all through fluorescent wheel after, continue to lead to
Next stage collimation lens, condenser lens are crossed, is reached out after then being reflected using three total reflection mirrors by second light splitting piece
Optical port carries out conjunction beam with yellow, green fluorescence, is mixed into white light.
3. the wheeled projector of two-color laser fluorescence according to claim 2, it is characterised in that：The fluorescent wheel includes circle
Heat-radiating substrate and the circular ring shape phosphor region for being set to heat-radiating substrate edge, the phosphor region include blue light transmission area, red transmission
Area and green-emitting fluorescent area.
4. the wheeled projector of two-color laser fluorescence according to claim 3, it is characterised in that：Red transmission area and green light are glimmering
It is respectively provided with sender unit between light area and between red transmission area and blue light transmission area, in fluorescent wheel rotary course, when
Laser spot sends out the control signal of laser emitter when passing through the sender unit.
5. the wheeled projector of two-color laser fluorescence according to claim 2, it is characterised in that：Light splitting piece and incident light direction
In 45 degree of angles, and it is coated with yellow, green light total reflection film.
6. the wheeled projector of two-color laser fluorescence according to any one of claim 1 to 5, it is characterised in that：Two are swashed
Optical transmitting set is respectively blue laser and red laser.
7. the control method based on the wheeled projector of two-color laser fluorescence described in claim 1, it is characterised in that：In fluorescent wheel
A swing circle in, include the following steps：
First, the laser spot that two laser emitters of adjusting are sent out overlaps the fluorescence area in fluorescent wheel；
Secondly, control fluorescent wheel at the uniform velocity rotates, and obtains the fluorescence area information that laser spot passes through in real time；
Then, laser spot is waited for trigger the device by sender unit and send out transmitting signal；
Finally, it after receiving transmitting signal, according to laser spot by emitter previous moment and the sequence of later moment in time, follows
Ring sends out the control signal of two laser emitters.
8. the control method of the wheeled projector of two-color laser fluorescence according to claim 7, it is characterised in that：Two laser
The control signal of transmitter is sent out according to following rule：
Judge the fluorescence area that laser spot passes through by the previous moment and later moment in time of sender unit,
If previous moment is red transmission area, later moment in time is green-emitting fluorescent area, then sends out red laser and stop, is blue sharp
The signal that light device is opened；
If previous moment is blue light transmission area, later moment in time is red transmission area, then sends out red laser and open, is blue sharp
The signal that light device stops；
If previous moment is red transmission area, later moment in time is blue light transmission area, then sends out red laser and stop, is blue sharp
The signal that light device is opened；
If previous moment is green-emitting fluorescent area, later moment in time is red transmission area, then sends out red laser and open, is blue sharp
The signal that light device stops.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121051.5A CN108196417A (en) | 2016-12-08 | 2016-12-08 | A kind of wheeled projector of two-color laser fluorescence and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611121051.5A CN108196417A (en) | 2016-12-08 | 2016-12-08 | A kind of wheeled projector of two-color laser fluorescence and its control method |
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| CN108196417A true CN108196417A (en) | 2018-06-22 |
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| CN110187595A (en) * | 2019-06-18 | 2019-08-30 | 吕素萍 | A kind of hybrid projection light source and forming method thereof |
| CN110749876A (en) * | 2019-08-30 | 2020-02-04 | 上海禾赛光电科技有限公司 | Calibration method and calibration structure for laser radar |
| CN111413843A (en) * | 2018-12-19 | 2020-07-14 | 卡西欧计算机株式会社 | Light source device and projection device |
| CN115951552A (en) * | 2023-03-09 | 2023-04-11 | 深圳市橙子数字科技有限公司 | Light emitting device and light source system |
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