CN207473278U - A kind of projection laser light source - Google Patents
A kind of projection laser light source Download PDFInfo
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- CN207473278U CN207473278U CN201721035980.4U CN201721035980U CN207473278U CN 207473278 U CN207473278 U CN 207473278U CN 201721035980 U CN201721035980 U CN 201721035980U CN 207473278 U CN207473278 U CN 207473278U
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Abstract
The utility model discloses a kind of projection laser light sources, excitation light source including being used to provide blue excitation light, in blue excitation light source light extraction light path, the shrink beam unit of shrink beam processing is carried out to exciting light, to change the subregion optical filter of the optical path direction of different color light, level-one lens between subregion optical filter and wavelength conversion unit, level-one lens converge the light source from subregion optical filter, light from wavelength conversion unit is collimated, wavelength conversion unit, including diffusion sheet and lasing region.It is moved towards by the subregion optical filter with level-one splitting area and two level plated film area to change light path, simultaneously by having the level-one lens of convergence and alignment function, to improve the utilization rate of light, so as to reach simplified light-source structure, reduce light source volume, the effect that processing is simply easily realized.
Description
Technical field
The utility model is related to light source, particularly a kind of projection laser light source.
Background technology
With the development of solid state light emitter, light emitting diode (LED, Light Emitting Diode) and semiconductor laser
Gradually enter into illumination and display market.
There are two types of the mode of generation white light or coloured light is general：One kind is directly using coloured light light source is for example red, green or blue-ray LED
To provide coloured light or synthesize white light using these coloured light；Another kind is come exciting light based on light wavelength conversion with excitation light source
Wavelength conversion material generates coloured light, and then synthesizes white light using the various coloured light that exciting light or excitation generate.Such as can produce
Raw short wavelength's such as light source of blue light or UV light carrys out excitation wavelength transition material for excitation light source, such as, but not limited to such as fluorescent powder.
By taking green light as an example, because being difficult to efficiently, price is very high for current green light LED or green (light) laser；Conversely, blue light and UV light
Solid-state devices is efficient and price is low, undoubtedly has the market prospects of bigger using latter scheme to generate green light.
The light source of the blue laser of mainstream+fluorescent powder scheme at present, nearly all using fluorescent reflection, blue laser transmission
Scheme needs that relaying circuit additionally is configured to blue laser to realize the closing light of blue laser and fluorescence, and therefore, the program exists
The problem of light-source structure is complicated, and volume is larger.
Utility model content
The purpose of this utility model is that by a kind of projection laser light source, answered to solve light-source structure in the prior art
It is miscellaneous, bulky problem.
To realize this purpose, following technical scheme is provided：
A kind of projection laser light source, including：Blue laser light source provides blue excitation light；Shrink beam unit swashs positioned at blue
In light emitting source light extraction light path, shrink beam processing is carried out to blue excitation light；Subregion optical filter, it is described including two or more subregions
Subregion can each be arranged to different coloured light is reflected or transmitted, to change the light path side of different color light
To；Level-one lens between subregion optical filter and wavelength conversion unit, carry out the blue excitation light from subregion optical filter
Convergence, collimates the light beam from wavelength conversion unit；Wavelength conversion unit, including diffusion sheet and lasing region, the wave
Long converting unit is arranged to that central axis can be surrounded, and allow in rotation incident light beam thereon successively repeatedly with
Diffusion sheet or lasing region individually contact；Wherein, the diffusion sheet surface of the wavelength conversion unit is coated with blue light anti-reflection film, works as blue
Diffusion sheet carries out it angular spread and reflects when excitation beam reaches diffusion sheet, and into level-one lens, output intensity is distributed as
The coloured light of annular, inner circle region light intensity are less than peripheral ring shaped region；The lasing region of the wavelength conversion unit includes one or more
The phosphor region of a coloured light, when blue excitation light beam is incident on up to exciting corresponding coloured light during lasing region and reflect.
Preferably, the subregion of the subregion optical filter includes level-one splitting area and two level plated film area, the level-one splitting area
Incident blue excitation light source is reflected or transmitted, the level-one splitting area is located at subregion filter center region.
Preferably, the level-one splitting area of the subregion optical filter be arranged on the dichroic coating that is plated on subregion optical filter or
For the color separation filter being glued on subregion optical filter, the two level plated film area surrounds a fraction to be arranged on subregion optical filter
The coating film area in light area.
Preferably, the lasing region of the wavelength conversion unit includes red fluorescence area and green fluorescence area.
Preferably, the projection laser light source further includes the second red light source, and second red light source is red led light
Source or red laser light source, the emergent light of second red light source is reflected or is transmitted eventually by subregion optical filter, with indigo plant
Finally the light of sectorized optical filter reflection or transmission converges outgoing to color laser light source.
Preferably, the projection laser light source further includes two level lens；The two level lens, positioned at subregion optical filter and
Between two red light sources, the emergent light light from the second red light source is converged or dissipated.
Preferably, the lasing region of the wavelength conversion unit includes green fluorescence area.
Preferably, the level-one splitting area reflection green light beam transmission red light beam and light beam of the subregion optical filter,
Green beam and light beam transmission red light beam are reflected in two level plated film area.
Preferably, the level-one splitting area transmission green beam reflection red light beam and light beam of the subregion optical filter,
Two level plated film area transmits green beam and light beam reflection red light beam.
Preferably, the level-one splitting area reflection light beam of the subregion optical filter, transmits red light beam and green beam；
Two level plated film area is coated with anti-reflection film, transmission light beam, red light beam and green beam.
Preferably, the level-one splitting area transmission light beam of the subregion optical filter, reflects red light beam and green beam,
Two level plated film area is coated with the film of reflection blue light, feux rouges and green light.
Preferably, further include with blue transparent area, green filter area and red filter area can be around center axis rotation
Colour wheel and three step lens；The colour wheel is arranged on the emergent light optical path direction of the subregion optical filter, and the three step lens is set
It puts between the colour wheel and subregion optical filter, for the emergent light for converging subregion optical filter and is incident on the light beam after convergence
The different filter areas of colour wheel；The lasing region of the wavelength conversion unit includes yellow fluorescence area and green fluorescence area；The color
Wheel is for so that the veiling glare from subregion optical filter is being incident on green filter area and the removal of red filter area back reflection.
Preferably, the blue excitation light beam spreads through diffusion sheet and is reflected into the color of level-one lens output annular spread
Light, the light distribution of the coloured light of annular spread have low ebb area, and low ebb section length is more than or equal to a fraction of subregion optical filter
Light area longer sides length is in the projected length in light intensity section.
The beneficial effects of the utility model are：By changing with the subregion optical filter in level-one splitting area and two level plated film area
Light path is moved towards, while by the diffusion sheet of annular angular distribution and the level-one lens with convergence alignment function, to improve light
Utilization rate eliminates blue light relaying light path so as to reach, simplifies light-source structure, reduce light source volume, the effect that processing is simply easily realized
Fruit.
Description of the drawings
Fig. 1 is one light-source structure schematic diagram of embodiment；
Fig. 2 is one subregion filter sheet structure schematic diagram of embodiment；
Fig. 3 is one wavelength conversion unit distribution map of embodiment；
Fig. 4 is the angular distribution figure of embodiment blue laser after diffusion sheet scattered reflection；
The surface of intensity distribution after Fig. 5 is emitted for one blue laser of embodiment by level-one collimated；
Fig. 6 is two light-source structure schematic diagram of embodiment；
Fig. 7 is three light-source structure schematic diagram of embodiment；
Fig. 8 is three wavelength conversion unit distribution map of embodiment；
Fig. 9 is example IV light-source structure schematic diagram；
Figure 10 is five light-source structure schematic diagram of embodiment；
Figure 11 is five wavelength conversion unit distribution map of embodiment；
Figure 12 is six light-source structure schematic diagram of embodiment；
Figure 13 is seven light-source structure schematic diagram of embodiment；
Figure 14 is seven colour wheel distribution map of embodiment；
Figure 15 is seven wavelength conversion unit distribution map of embodiment；
Figure 16 is eight light-source structure schematic diagram of embodiment.
Specific embodiment
The technical program is described in detail with embodiment below in conjunction with attached drawing.
Embodiment one
It is as shown in Figure 1 the present embodiment light-source structure schematic diagram, the blue excitation light including being used to provide blue excitation light
Source 400, wherein blue excitation light source 400 can be not limited to include a blue laser light source；Go out positioned at blue excitation light source 400
In light light path, the shrink beam unit 500 of shrink beam processing is carried out to exciting light；To change the filter of the subregion of the optical path direction of different color light
Mating plate 300；Level-one lens 200 between subregion optical filter 300 and wavelength conversion unit 100.
The level-one lens 200 converge the light beam from subregion optical filter 300, to coming from wavelength conversion unit
100 light beam is collimated.
The wavelength conversion unit 100, including diffusion sheet and lasing region, the wavelength conversion unit is arranged in can surrounding
Central axis, and in rotation incident light beam thereon is individually contacted successively with diffusion sheet or lasing region repeatedly,
Angular spread is carried out to coloured light when coloured light reaches diffusion sheet and is reflected, corresponding coloured light is excited when exciting light reaches lasing region,
And it reflects.
The subregion optical filter 300 includes two or more subregions, and the subregion can each be arranged to difference
Coloured light reflected or transmitted.As shown in Fig. 2, the subregion optical filter 300 includes the level-one splitting area 310 of rectangular configuration
With the two level plated film area 320 of rectangular configuration, the level-one splitting area 310 incident blue excitation light source 400 is reflected or
Transmission, the long hem width degree in level-one splitting area are m, and the light that level-one splitting area 310 is emitted shrink beam unit 500 is reflected or transmitted,
Level-one splitting area 310 is preferably placed at 320 central area of subregion optical filter 300 or two level plated film area.
320 preferred rectangle of two level plated film area, the effect of rectangle is to reduce the area that level-one plated film area accounts for, because being incident on one
The blue laser beam circumference in grade plated film area has long short side, level-one plated film area, which should cover, to be incident on above close to rectangle
Laser beam, therefore be set as rectangle and can ensure to be completely covered, while reduce the area shared by it as possible.Certainly, two level plated film
Area 320 can also select other shapes according to actual needs, it is made to cover incident laser beam thereon as far as possible.
The level-one splitting area 310 of the subregion optical filter for be arranged on the dichroic coating that is plated on subregion optical filter 300 or
For the color separation filter being glued on subregion optical filter, the two level plated film area 320 is surrounded to be arranged on subregion optical filter 300
The coating film area of level-one splitting area 310.
The diffusion sheet surface of wavelength conversion unit 100 is preferably coated with blue light anti-reflection film, and the effect of blue anti-reflection film is to reduce
The blu-ray reflection rate on wavelength conversion unit surface, so as to reduce the blue light reflected into light path.
When the arrival diffusion sheet of blue excitation light beam 400, diffusion sheet carries out angular spread to it and reflects, saturating into level-one
Mirror 200, output intensity are distributed as the coloured light of annular, and inner circle region light intensity is less than peripheral ring shaped region；The wavelength conversion unit
Lasing region include the phosphor regions of one or more coloured light, when blue excitation light beam 400 is incident reaches lasing region excitation correspond to
Coloured light and reflection.The lasing region of the wavelength conversion unit 100 includes the phosphor region of one or more coloured light, works as blue excitation
Light beam incidence excites corresponding coloured light and reflects when reaching lasing region.
The distribution of wavelength conversion unit 100 as shown in Figure 3, reflective diffusion sheet 110 carry out blue excitation light beam anti-
Penetrate angular spread, in the present embodiment lasing region include red fluorescence area 130 and green fluorescence area 120, swashed by blue excitation light
Hair generates corresponding red fluorescence and green fluorescence.
In the present embodiment, the level-one splitting area reflection blue light of subregion optical filter 300a transmits feux rouges and green light, two level plated film
Area is coated with the film of transmission blue light, feux rouges and green light.
Wherein, shrink beam unit 500 preferably includes positive focus lens 501 and negative focus lens 502.Shrink beam unit 500 is preferably provided with
Into the combination of positive negative lens, naturally it is also possible to be arranged to the combination of positive positive lens according to actual needs.
Reflective diffusion sheet 110 is so that it is annular point that the coloured light that script angular distribution is Gaussian Profile, which is converted to angular distribution,
The coloured light of cloth, as shown in Figure 4；After the coloured light of the angular distribution is by level-one lens, light distribution can be formed as annular spread
Coloured light, inner circle region light intensity is less than peripheral ring shaped region light intensity, and light distribution has low ebb area, and low ebb section length ab is more than
Equal to subregion optical filter level-one splitting area longer sides length m light intensity section projected length, i.e. ab be more than or equal to mx
Sin45 °, so as to reduce its by level-one splitting area when because center inner circle region reflect caused by energy loss.
Blue excitation light source 400 sends out blue laser, carries out shrink beam by shrink beam unit 500, reaches subregion optical filter 300
Level-one splitting area 310, level-one splitting area 310 is by the dichroic coating that is plated on subregion optical filter or to be glued at subregion optical filter
On color separation filter, blue laser is reflexed into level-one lens 200, blue laser is converged to wavelength and turned by level-one lens 200
Unit 100 is changed, when the reflective diffusion sheet 110 of blue laser contact wavelength conversion unit 100, blue laser is subjected to angle
It spreads and reflexes to level-one lens 200, blue laser is refracted to subregion according to its light distribution characteristic and filtered by level-one lens 200
The two level plated film area 320 of piece 300, two level coated filter 320 is coated with the film of transmission blue and green light and feux rouges, by blue laser
Transmission is gone out；When blue laser contacts the red fluorescence area 130 of wavelength conversion unit 100 or green fluorescence area 120, generate red
Light or green light simultaneously reflex to level-one lens 200, and two level plated film area 320 and level-one splitting area 310 are refracted to by level-one lens 200
Transmission is gone out.
Embodiment two
The present embodiment light-source structure schematic diagram is illustrated in figure 6, comparing its main distinction with embodiment one is, laser light
Source is different from the relative position of wavelength conversion unit so that the level-one splitting area transmission blue light of subregion optical filter 300a, reflection are red
Light and green light, two level plated film area are coated with the film of reflection blue light, feux rouges and green light.According to the plated film situation of subregion optical filter 300a,
Excitation light source, shrink beam unit, subregion optical filter and level-one lens optical path Center are point-blank.
Blue excitation light source sends out blue laser, carries out shrink beam by shrink beam unit, reaches the one of subregion optical filter 300a
Grade splitting area, dichroic coating of the level-one splitting area by being plated on subregion optical filter or the color separation to be glued on subregion optical filter are filtered
Blue laser is transmitted through level-one lens by mating plate, and blue laser is converged to wavelength conversion unit, works as blue laser by level-one lens
When contacting the reflective diffusion sheet of wavelength conversion unit, blue laser is subjected to angular spread and reflexes to level-one lens, level-one
Blue laser is refracted to the two level plated film area of subregion optical filter 300a according to its light distribution characteristic by lens, and two level plated film filters
Piece is coated with the film of reflection blue light, feux rouges and green light, and blue laser is reflected away；When blue laser contact wavelength conversion unit
When red fluorescence area or green fluorescence area, generate feux rouges or green light and reflex to level-one lens, two are refracted to by level-one lens
Grade plated film area and level-one splitting area reflect away.
Embodiment three
The present embodiment light-source structure schematic diagram is illustrated in figure 7, comparing the main distinction with embodiment one is the present embodiment
The projection laser light source further includes the second red light source 600, and second red light source 600 is red LED light source or red
Laser light source, the emergent light of second red light source 600 is reflected or is transmitted eventually by subregion optical filter, with blue laser
Finally the light of sectorized optical filter 300b reflections or transmission converges outgoing to light source；It is saturating that the projection laser light source further includes two level
Mirror 601；The two level lens 601 are located between subregion optical filter and the second red light source 600, to coming from the second red light source
600 emergent light light is converged or is dissipated.
In the present embodiment, the two level lens 601 are placed in front of 600 light path of the second red light source, the second red light source 600
For red laser or red LED light, light source 600 is parallel with the emergent light of blue excitation light source, and 600 sectorized optical filter of light source
Light after reflection and blue excitation light source, emergent light is parallel after sectorized filter transmission, and second light source 600 is placed in wavelength
The light emission side of converting unit 101.
Wherein, as shown in figure 8, including reflective diffusion sheet 111, lasing region is green for the distribution of wavelength conversion unit 101
Phosphor region 121.
Wherein, the level-one splitting area transmission green reflection feux rouges of subregion optical filter 300b and blue light, two level plated film area are coated with
Transmit the film of green light and blu-ray reflection feux rouges.
In the present embodiment, blue excitation light source sends out blue laser, and shrink beam is carried out by shrink beam unit, reaches subregion and filters
The level-one splitting area of piece 300b, level-one splitting area are filtered by the dichroic coating that is plated on subregion optical filter 300b or to be glued at subregion
Blue laser is reflexed to level-one lens by the color separation filter on mating plate 300b, and blue laser is converged to wavelength by level-one lens
Blue laser when the reflective diffusion sheet of blue laser contact wavelength conversion unit 101, is carried out angle by converting unit 101
It spreads and reflexes to level-one lens, blue laser is refracted to subregion optical filter 300b by level-one lens according to its light distribution characteristic
Two level plated film area, two level coated filter be coated with transmission green light and blu-ray reflection feux rouges film, blue laser is transmitted away；
When the green fluorescence area of blue laser contact wavelength conversion unit 101, generate green light and reflex to level-one lens, by level-one
Lens refract to two level plated film area and level-one splitting area and transmit away.
Second red light source 600 sends out red beam, and red beam is incident on two level lens 601, and two level lens 601 will be red
Coloured light diverging refracts to the two level plated film area of subregion optical filter 300b and level-one splitting area, and red reflective is gone out.
By the red beam that subregion optical filter 300b is emitted, blue laser and green light carry out closing light outgoing.
Example IV
The present embodiment light-source structure schematic diagram is illustrated in figure 9, comparing the main distinction with embodiment three is the present embodiment
The center of emergent light after the central ray of second light source 600a emergent lights is reflected with the sectorized optical filter 303 of first light source emergent light
Light ray parallel.
Wherein, the level-one splitting area reflection green light transmission feux rouges of subregion optical filter 303 and blue light, two level plated film area are coated with instead
Penetrate the film of green light and blue light transmission feux rouges.
In the present embodiment, blue excitation light source sends out blue laser, and shrink beam is carried out by shrink beam unit, reaches subregion and filters
The level-one splitting area of piece 303, level-one splitting area are filtered by the dichroic coating that is plated on subregion optical filter 303 or to be glued at subregion
Blue laser is transmitted through level-one lens by the color separation filter on piece 303, and blue laser is converged to wavelength convert by level-one lens
Blue laser when the reflective diffusion sheet of blue laser contact wavelength conversion unit, is carried out angular spread and reflected by unit
To level-one lens, blue laser is refracted to the two level plated film of subregion optical filter 303 according to its light distribution characteristic by level-one lens
Area, two level coated filter are coated with the film of reflection green light and blue light transmission feux rouges, blue laser are reflected away；Work as blue laser
When contacting the green fluorescence area of wavelength conversion unit, generate green light and reflex to level-one lens, two are refracted to by level-one lens
Grade plated film area and level-one splitting area reflect away.
Second red light source 600a sends out red beam, and red beam is incident on two level lens, and two level lens are by red light
Diverging refracts to the two level plated film area of subregion optical filter 303 and level-one splitting area, and red light is transmitted away.
By the red beam that subregion optical filter 303 is emitted, blue laser and green light carry out closing light outgoing.
Embodiment five
It is as shown in Figure 10 the present embodiment light-source structure schematic diagram, comparing the main distinction with embodiment one is the present embodiment
Increase second light source 602 and two level lens 603, the backlight side that second light source 602 is placed in wavelength conversion unit 102 (are not excited
The side of luminous excitation beam), two level lens 603 are placed between second light source 602 and wavelength conversion unit 102, second light source
The central rays parallel of the emerging beam of the central ray of 602 light extractions optical filter reflection sectorized with first light source.
Wherein, the distribution of wavelength conversion unit 102 is as shown in figure 11, and diffusion sheet includes reflective diffusion sheet 112 and transmission
Formula diffusion sheet 132, lasing region include green fluorescence area 122.
Blue excitation light source sends out blue laser, carries out shrink beam by shrink beam unit, reaches a fraction of subregion optical filter
Light area, dichroic coating of the level-one splitting area by being plated on subregion optical filter or the color separation to be glued on subregion optical filter filter
Blue laser is reflexed to level-one lens by piece, and blue laser is converged to wavelength conversion unit 102 by level-one lens, when blue swashs
When light contacts the reflective diffusion sheet of wavelength conversion unit 102, blue laser is subjected to angular spread and reflexes to level-one lens,
Blue laser is refracted to the two level plated film area of subregion optical filter according to its light distribution characteristic by level-one lens, and two level plated film filters
Piece is coated with the film of transmission blue and green light and feux rouges, and blue laser is transmitted away；When blue laser contacts wavelength conversion unit
During 102 green fluorescence area 122, generate green light and simultaneously reflex to level-one lens, by level-one lens refract to two level plated film area and
Level-one splitting area transmits away.
Second red light source 602 sends out red beam, and red beam is incident on two level lens 603, and two level lens 603 will be red
Coloured light converges to wavelength conversion unit 102, will when the transmission-type diffusion sheet 132 of red beam contact wavelength conversion unit 102
Red light transmits away, and refracting to two level plated film area and level-one splitting area using the level-one lens of subregion optical filter transmits
It goes.
By the red beam that subregion optical filter is emitted, blue laser and green light carry out closing light outgoing.
Embodiment six
It is as shown in figure 12 the present embodiment light-source structure schematic diagram, comparing the main distinction with embodiment five is the present embodiment
Second light source 602a emergent lights central ray it is vertical with the central ray for the emerging beam that sectorized optical filter 304 reflects,
Second light source 602a is parallel with the emergent light of blue excitation light source, and the light after the sectorized optical filter reflections of second light source 602a
It is vertical with blue excitation light source emergent light.
Wherein, the level-one splitting area transmission blue light of subregion optical filter 304 reflects the film of feux rouges and green light, two level plated film area
It is coated with the film of reflection blue light, feux rouges and green light.
Blue excitation light source sends out blue laser, carries out shrink beam by shrink beam unit, reaches a fraction of subregion optical filter
Light area, dichroic coating of the level-one splitting area by being plated on subregion optical filter or the color separation to be glued on subregion optical filter filter
Blue laser is transmitted through level-one lens by piece, and blue laser is converged to wavelength conversion unit by level-one lens, when blue laser connects
When touching the reflective diffusion sheet of wavelength conversion unit, blue laser is subjected to angular spread and reflexes to level-one lens, level-one is saturating
Blue laser is refracted to the two level plated film area of subregion optical filter according to its light distribution characteristic by mirror, and two level coated filter is coated with
The film of blue light, feux rouges and green light is reflected, blue laser is reflected away；When the green of blue laser contact wavelength conversion unit is glimmering
It during light area, generates green light and reflexes to level-one lens, refracting to two level plated film area and level-one splitting area by level-one lens reflects
It goes out.
Second red light source 602a sends out red beam, and red beam is incident on two level lens, and two level lens are by red light
Wavelength conversion unit is converged to, when the transmission-type diffusion sheet of red beam contact wavelength conversion unit, red light is transmitted
It goes, refracting to two level plated film area and level-one splitting area by level-one lens reflects away.
By the blue laser that subregion optical filter reflects, green light and feux rouges carry out closing light outgoing.
Embodiment seven
It is as shown in figure 13 the present embodiment light-source structure schematic diagram, comparing the main distinction with embodiment one is the present embodiment
Further include with blue transparent area, green filter area and red filter area can around center axis rotation colour wheel 604 and three-level it is saturating
Mirror 605；The lasing region of wavelength conversion unit includes yellow fluorescence 133 and green fluorescence area 123, and the colour wheel 604 is arranged on institute
State on the emergent light optical path direction of subregion optical filter, the three step lens 605 be arranged on the colour wheel 604 and subregion optical filter it
Between, the different filter areas of colour wheel are incident on for the emergent light for converging subregion optical filter and by the light beam after convergence；
In the present embodiment, the sectorized 305 two level plated film area of optical filter of emergent light that colour wheel 604 is placed in blue excitation light source is saturating
On light direction after penetrating, third lens 605 are placed between subregion optical filter 305 and colour wheel 604, will come from subregion optical filter
305 light is converged on colour wheel 604.
Wherein, the distribution of colour wheel 604 includes blue transparent area 614, green filter area 624 and red filter as shown in figure 14
Area 634；The setting of colour wheel 604 is so that the veiling glare light beam from subregion optical filter 305 passes through at green chromatic color area and yellow chromatic color area
Green filter area 624 and the removal of 634 back reflection of red filter area.
Wherein, the distribution of wavelength conversion unit 103 is as shown in figure 15, including diffusion sheet 113 and lasing region；Wherein excite
Area includes yellow fluorescence 133 and green fluorescence area 123.
Wherein, the level-one splitting area reflection blue light transmission yellow light of subregion optical filter 305 and the film of green light, the plating of two level plated film area
There is the film of transmission blue and green light and yellow light.
Blue excitation light source sends out blue laser, carries out shrink beam by shrink beam unit, reaches the level-one of subregion optical filter 305
Splitting area, dichroic coating of the level-one splitting area by being plated on subregion optical filter or the color separation to be glued on subregion optical filter filter
Blue laser is reflexed to level-one lens by piece, and blue laser is converged to wavelength conversion unit 103 by level-one lens, when blue swashs
When light contacts the diffusion sheet 113 of wavelength conversion unit 103, blue laser is subjected to angular spread and reflexes to level-one lens, one
Blue laser is refracted to the two level plated film area of subregion optical filter 305, two level plating membrane filtration according to its light distribution characteristic by grade lens
Mating plate is coated with the film of transmission blue and green light and yellow light, and blue laser is transmitted away；When blue laser contacts wavelength conversion unit
When 103 yellow fluorescence or green fluorescence area, generate yellow light or green light and reflex to level-one lens, refracted to by level-one lens
Two level plated film area and level-one splitting area transmit away.
The blue laser of sectorized optical filter outgoing, yellow light and green light closing light are incident on third lens 605, and converge to color
On wheel 604.Light beam through convergence is removed veiling glare on the different filter areas of colour wheel 604 by being incident on.
Embodiment eight
It is as shown in figure 16 the present embodiment light-source structure schematic diagram, comparing the main distinction with embodiment seven is the present embodiment
Subregion optical filter 306 level-one splitting area be coated with reflection yellow light and green light transmission blue light film, two level plated film area is coated with reflection
The film of yellow light, blue light and green light.Colour wheel 605 is placed in the sectorized 306 two level plated film area of optical filter of emergent light of blue excitation light source
On light direction after reflection, third lens are placed between subregion optical filter 306 and colour wheel, will come from subregion optical filter 306
Light is converged on colour wheel.
Blue excitation light source sends out blue laser, carries out shrink beam by shrink beam unit, reaches the level-one of subregion optical filter 306
Splitting area, dichroic coating of the level-one splitting area by being plated on subregion optical filter or the color separation to be glued on subregion optical filter filter
Blue laser is transmitted through level-one lens by piece, and blue laser is converged to wavelength conversion unit by level-one lens, when blue laser connects
The expansion of wavelength conversion unit is touched when penetrating piece, blue laser is subjected to angular spread and reflexes to level-one lens, level-one lens according to
Blue laser is refracted to the two level plated film area of subregion optical filter by its light distribution characteristic, and it is blue that two level coated filter is coated with transmission
The film of light, green light and yellow light, blue laser is reflected away；When the blue laser contact yellow fluorescence of wavelength conversion unit or green
During color phosphor region, generate yellow light or green light and reflex to level-one lens, two level plated film area and level-one are refracted to by level-one lens
Splitting area reflects away.
The blue laser of sectorized optical filter outgoing, yellow light and green light closing light are incident on third lens, and converge to colour wheel
On.Light beam through convergence is removed veiling glare on the different filter areas of colour wheel by being incident on.
It, can also be according to the plated film relationship of subregion optical filter 306, corresponding excitation light source and level-one lens in the present embodiment
Location following variation.
In the utility model embodiment, the concrete structure setting of above example is not limited to, can be increased according to actual conditions
The setting for adding or reducing one or more elements (for example is not provided with shrink beam unit, blue laser light source is changed to assemble light
The light source that emits of mode；But if to realize high brightness, shrink beam unit is just preferably provided with, since it is desired that more blue lasers
As excitation light source, incident laser beam is multi beam blue laser beam at this time, and one could be all incident on by needing to do shrink beam processing
Grade splitting area) or exchange the positions of one or more elements and (for example change blue laser light source and subregion optical filter and wavelength
The relative position of converting unit, while adjust the functional areas setting of subregion optical filter and wavelength conversion unit).
In the utility model embodiment, by changing light path with the subregion optical filter in level-one splitting area and two level plated film area
Trend, while by the diffusion sheet of annular angular distribution and the level-one lens with convergence alignment function, to improve the utilization of light
Rate eliminates blue light relaying light path so as to reach, simplifies light-source structure, reduce light source volume, the effect that processing is simply easily realized.Institute
The subregion for stating subregion optical filter is not limited to two subregions of setting described in embodiment, and multiple points can also be set according to actual conditions
Area, the position of each subregion are not limited to described in the utility model embodiment, for example, level-one splitting area can not also be centrally disposed
Position can be arranged on other positions, etc. according to actual conditions.
The above content is the further descriptions done with reference to optimal technical scheme to the utility model, it is impossible to assert real
These explanations are only limitted to novel specific implementation.For the utility model person of an ordinary skill in the technical field,
Under the premise of not departing from the utility model design, simple deduction can be made and replaced, should all be considered as the utility model
Protection domain.
Claims (13)
1. a kind of projection laser light source, including：
Blue laser light source provides blue excitation light；
In blue excitation light source light extraction light path, shrink beam processing is carried out to blue excitation light for shrink beam unit；
Subregion optical filter, including two or more subregions, the subregion can each be arranged to different coloured light progress
Reflection or transmission, to change the optical path direction of different color light；
Level-one lens, between subregion optical filter and wavelength conversion unit, to the blue excitation light from subregion optical filter into
Row convergence, collimates the light beam from wavelength conversion unit；
Wavelength conversion unit, including diffusion sheet and lasing region, the wavelength conversion unit is arranged to that central axis can be surrounded, and
And in rotation incident light beam thereon is individually contacted successively with diffusion sheet or lasing region repeatedly；
Wherein,
The diffusion sheet surface of the wavelength conversion unit is coated with blue light anti-reflection film, is spread when blue excitation light beam reaches diffusion sheet
Piece carries out it angular spread and reflects, and into level-one lens, output intensity is distributed as the coloured light of annular, and inner circle region light intensity is low
In peripheral ring shaped region；
The lasing region of the wavelength conversion unit includes the phosphor region of one or more coloured light, is reached when blue excitation light beam is incident on
Corresponding coloured light is excited during lasing region and is reflected.
2. a kind of projection laser light source according to claim 1, which is characterized in that the subregion of the subregion optical filter includes
Level-one splitting area and two level plated film area, the level-one splitting area is reflected or is transmitted to incident blue excitation light source, described
Level-one splitting area is located at subregion filter center region.
A kind of 3. projection laser light source according to claim 2, which is characterized in that the level-one light splitting of the subregion optical filter
Area is to be arranged on the dichroic coating plated on subregion optical filter or the color separation filter to be glued on subregion optical filter, described two
Grade plated film area is to be arranged on the coating film area that level-one splitting area is surrounded on subregion optical filter.
A kind of 4. projection laser light source according to claim 1, which is characterized in that the excitation of the wavelength conversion unit
Area includes red fluorescence area and green fluorescence area.
5. a kind of projection laser light source according to claim 1, which is characterized in that the projection laser light source further includes
Two red light sources, second red light source are red LED light source or red laser light source, the outgoing of second red light source
Light eventually by subregion optical filter reflects either transmission and blue laser light source, and finally sectorized optical filter reflects or transmission
Light converges outgoing.
6. a kind of projection laser light source according to claim 5, which is characterized in that the projection laser light source further includes two
Grade lens；The two level lens, between subregion optical filter and the second red light source, to the outgoing from the second red light source
Light is converged or is dissipated.
A kind of 7. projection laser light source according to claim 6, which is characterized in that the excitation of the wavelength conversion unit
Area includes green fluorescence area.
A kind of 8. projection laser light source according to claim 7, which is characterized in that the level-one light splitting of the subregion optical filter
Area's reflection green light beam transmission red light beam and light beam, two level plated film area reflection green beam and light beam transmission feux rouges
Light beam.
A kind of 9. projection laser light source according to claim 7, which is characterized in that the level-one light splitting of the subregion optical filter
Area's transmission green beam reflection red light beam and light beam, two level plated film area transmission green beam and light beam reflection feux rouges
Light beam.
A kind of 10. projection laser light source according to claim 4 or 7, which is characterized in that the level-one of the subregion optical filter
Light beam is reflected in splitting area, transmits red light beam and green beam；Two level plated film area is coated with anti-reflection film, transmission light beam,
Red light beam and green beam.
A kind of 11. projection laser light source according to claim 4 or 7, which is characterized in that the level-one of the subregion optical filter
Splitting area transmits light beam, reflects red light beam and green beam, and two level plated film area is coated with reflection blue light, feux rouges and green light
Film.
12. a kind of projection laser light source according to claim 1, which is characterized in that further include with blue transparent area, green
Color filter area and red filter area can be around the colour wheel and three step lens of center axis rotation；
The colour wheel is arranged on the emergent light optical path direction of the subregion optical filter, and the three step lens is arranged on the colour wheel
Between subregion optical filter, the different filters of colour wheel are incident on for the emergent light for converging subregion optical filter and by the light beam after convergence
Light area；
The lasing region of the wavelength conversion unit includes yellow fluorescence area and green fluorescence area；
The colour wheel is for so that the veiling glare from subregion optical filter is being incident on green filter area and red filter area back reflection
Removal.
13. a kind of projection laser light source according to claim 1, which is characterized in that the blue excitation light beam is through diffusion
Piece spreads and is reflected into the coloured light of level-one lens output annular spread, and the light distribution of the coloured light of annular spread has low ebb
Area, and low ebb section length is more than or equal to projected length of the level-one splitting area longer sides length in light intensity section of subregion optical filter.
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| CN201721035980.4U CN207473278U (en) | 2017-08-18 | 2017-08-18 | A kind of projection laser light source |
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| CN201721035980.4U CN207473278U (en) | 2017-08-18 | 2017-08-18 | A kind of projection laser light source |
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