CN108663881A - A kind of projection light source and its optical projection system - Google Patents

A kind of projection light source and its optical projection system Download PDF

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Publication number
CN108663881A
CN108663881A CN201810245714.7A CN201810245714A CN108663881A CN 108663881 A CN108663881 A CN 108663881A CN 201810245714 A CN201810245714 A CN 201810245714A CN 108663881 A CN108663881 A CN 108663881A
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CN
China
Prior art keywords
light source
spectroscope
speculum
colour wheel
datum line
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CN201810245714.7A
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Chinese (zh)
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CN108663881B (en
Inventor
高志强
杨伟樑
赖泓基
林清云
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Vision Technology (shenzhen) Co Ltd
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Vision Technology (shenzhen) Co Ltd
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Priority to CN201810245714.7A priority Critical patent/CN108663881B/en
Publication of CN108663881A publication Critical patent/CN108663881A/en
Priority to PCT/CN2019/070264 priority patent/WO2019179209A1/en
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Publication of CN108663881B publication Critical patent/CN108663881B/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • 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
    • G03B21/2066—Reflectors in illumination beam

Abstract

Embodiment of the present invention is related to a kind of projection light source and its optical projection system, including：Blue laser light source, red laser light source, rotation fluorescence colour wheel, collector lens, the first spectroscope and red laser speculum；The working face of rotation fluorescence colour wheel has been disposed adjacent annulus fluorescent layer and annular reflection diffusion layer；Blue laser light source, red laser light source, collector lens, the first spectroscope and red laser speculum may be contained within the working face side of rotation fluorescence colour wheel, annulus fluorescent layer, collector lens, the first spectroscope and the blue laser light source of rotation fluorescence colour wheel are located at the first datum line, red laser speculum and the first spectroscope are located at the second datum line, red laser light source off-axis is arranged, and the red laser light beam and the first datum line of outgoing form the first off-axis angle a.By the above-mentioned means, embodiment of the present invention can promote the colour gamut of projection light source in the case where not influencing projection light source brightness, simultaneously so that projection light source is compact-sized.

Description

A kind of projection light source and its optical projection system
Technical field
Embodiment of the present invention is related to projection display technique field, is more particularly to a kind of projection light source and its projection System.
Background technology
Laser is a kind of high brightness, high directivity, the light source that can send out monochromatic coherent light beam.In recent years, because of laser Plurality of advantages so that laser as projection light source by gradually be applied to projection display technique field, by laser as projected light Optical projection system service life length, various colors and the picture brightness height in source.
In the prior art, the projection light source of optical projection system mostly uses greatly the scheme of blue laser excitated fluorescent powder, wherein blue Light is directly provided by blue laser, and the green fluorescence that green light is generated by blue laser excitation green emitting phosphor is filtered through green filter section Go out, the yellow fluorescence that feux rouges is generated by blue laser excitation yellow fluorescent powder is filtered out through red filter section.In this kind of mode, due to Feux rouges is filtered out by yellow fluorescence so that the excitation purity of feux rouges is not high, and then causes the colour gamut of projection light source not high, if leading to by force It crosses and filters out more yellow lights to promote the excitation purity of feux rouges, the feux rouges section efficiency of optical projection system can be reduced, drag low projection light source Brightness so that both colour gamut and brightness can not be taken into account.Then, how in the case where not influencing projection light source brightness colour gamut is improved As urgent problem to be solved.
Invention content
Embodiment of the present invention is intended to provide a kind of projection light source and its optical projection system, can not influence projection light source The colour gamut of projection light source is promoted in the case of brightness, simultaneously so that projection light source is compact-sized, and volume will not be red sharp because increasing Radiant and be significantly increased.
In order to solve the above technical problems, the technical solution that embodiment of the present invention uses is：A kind of projected light is provided Source, including：
Blue laser light source, red laser light source, rotation fluorescence colour wheel, collector lens, the first spectroscope and red swash Light reflection mirror；
The working face setting annulus fluorescent layer and annular reflection diffusion layer of the rotation fluorescence colour wheel, the annulus fluorescent layer It is disposed adjacent with the annular reflection diffusion layer；
The blue laser light source, red laser light source, collector lens, the first spectroscope and red laser speculum are all provided with It is placed in the working face side of the rotation fluorescence colour wheel, also,
Annulus fluorescent layer, the collector lens, first spectroscope and the blue of the rotation fluorescence colour wheel Laser light source is located at the first datum line,
The red laser speculum and first spectroscope are located at the second datum line,
Red laser light source off-axis setting so that the red laser light beam of red laser light source outgoing with it is described First datum line forms the first off-axis angle a.
Optionally, first datum line and second datum line are mutually perpendicular to；
The first off-axis angle a meets formulaWherein, d is that annular reflection diffusion layer center loop wire arrives The distance of first datum line, f are the focal length of the collector lens.
Optionally, the angle of first spectroscope and first datum line is 45 °；
The red laser speculum is set to first spectroscope far from rotation fluorescence colour wheel side；
The normal of the red laser speculum and the angle b of second datum line meet formula
Optionally, the annulus fluorescent layer includes：Blue laser transmission area, yellow fluorescent powder area and green emitting phosphor area；
The projection light source further includes：First speculum, the second speculum and the second spectroscope；
Second spectroscope is set to the side of the working face of the rotation fluorescence colour wheel,
First speculum and second speculum are set to the other side of the working face of the rotation fluorescence colour wheel, Also,
First speculum, the annulus fluorescent layer of the rotation fluorescence colour wheel, the collector lens, first light splitting Mirror and the blue laser light source are located at the first datum line,
The red laser speculum, first spectroscope and second spectroscope are located at the second datum line,
Second spectroscope and second speculum are located at third datum line,
Second speculum and first speculum are located at the 4th datum line.
Optionally, first datum line, the second datum line, third datum line and the 4th datum line are rectangular；
Second speculum and the second spectroscope are parallel to first spectroscope, and second speculum, One spectroscope and the second spectroscope are each perpendicular to first speculum.
Optionally, the annulus fluorescent layer includes：Blue laser echo area, yellow fluorescent powder area and green emitting phosphor area；
The projection light source further includes：Blue laser speculum；
Blue laser light source off-axis setting so that the blue laser beams of blue laser light source outgoing with it is described First datum line forms the second off-axis angle c.
Optionally, the second off-axis angle c meets formulaWherein, d2For the sideline of the annulus fluorescent layer To the distance of first datum line, f is the focal length of the collector lens.
Optionally, the annulus fluorescent layer includes：Blue laser specular scattering area, yellow fluorescent powder area and green emitting phosphor Area；
First spectroscope includes：First reflecting segment, the second reflecting segment and transmissive segments；
The transmissive segments are set between first reflecting segment and the second reflecting segment；
The transmissive segments reflect other color beams for transmiting blue light and feux rouges.
Optionally, the length of the transmissive segments is not less than blue light spot diameter, also, the smaller indigo plant of length of the transmissive segments Light loss is smaller.
Optionally, the projection light source further includes：
Rotating filtering colour wheel；
The annular filter layer of working face setting of the rotating filtering colour wheel, the annular filter layer position of the rotating filtering colour wheel In second datum line.
In order to solve the above technical problems, another technical solution that embodiment of the present invention uses is：A kind of projection is provided System, including：
Display chip, projection lens and above-described projection light source.
The advantageous effect of embodiment of the present invention is：In the case of being different from the prior art, embodiment of the present invention provides A kind of projection light source and its optical projection system, the projection light source include：Blue laser light source, red laser light source, rotation fluorescence Annulus fluorescent layer is arranged in the working face of colour wheel, collector lens, the first spectroscope and red laser speculum, rotation fluorescence colour wheel With annular reflection diffusion layer, and annulus fluorescent layer and annular reflection diffusion layer are disposed adjacent；Wherein, blue laser light source, red Color laser light source, collector lens, the first spectroscope and red laser speculum may be contained within the working face one of rotation fluorescence colour wheel Side, also, the annulus fluorescent layer, collector lens, the first spectroscope and the blue laser light source that rotate fluorescence colour wheel are located at first Datum line, red laser speculum and the first spectroscope are located at the second datum line, and then off-axis is arranged red laser light source, so that The red laser light beam and the first datum line of red laser light source outgoing form the first off-axis angle a.The above embodiment by Increase red laser light source replacement in projection light source and filter out the mode of yellow light to promote the excitation purity of feux rouges, improves projection light source Colour gamut while can not influence projection light source brightness, ensure that brightness and the colour gamut of projection light source；Meanwhile by projecting Annular reflection diffusion layer is set in light source, and red laser light source off-axis is arranged so that red laser light source can swash with blue Radiant is set to the same side, rationally utilizes the space between rotation fluorescence colour wheel and blue laser light source so that projection light source Compact-sized, volume will not be significantly increased because increasing red laser light source.
Description of the drawings
One or more embodiments are illustrated by the picture in corresponding attached drawing, these are exemplary Illustrate not constitute the restriction to embodiment, the element with same reference numbers label is expressed as similar member in attached drawing Part, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of structural schematic diagram for projection light source that the embodiment of the present invention one provides；
Fig. 2 is a kind of index path for projection light source that the embodiment of the present invention one provides；
Fig. 3 is the structural schematic diagram for the rotation fluorescence colour wheel that the embodiment of the present invention one provides；
Fig. 4 is a kind of structural schematic diagram of projection light source provided by Embodiment 2 of the present invention；
Fig. 5 is a kind of index path of projection light source provided by Embodiment 2 of the present invention；
Fig. 6 is the structural schematic diagram of rotation fluorescence colour wheel provided by Embodiment 2 of the present invention；
Fig. 7 is a kind of structural schematic diagram for projection light source that the embodiment of the present invention three provides；
Fig. 8 is a kind of index path for projection light source that the embodiment of the present invention three provides；
Fig. 9 is the structural schematic diagram for the rotation fluorescence colour wheel that the embodiment of the present invention three provides.
It please refers to Fig.1 to Fig. 9,1 is projection light source, and 11 be blue laser light source, and 12 be red laser light source, and 21 be rotation Fluorescence colour wheel, 211 be annular reflection diffusion layer, and 212 be annulus fluorescent layer, and 2121 be green emitting phosphor area, and 2122 is glimmering for yellow The areas Guang Fen, 2123 be blue laser transmission area, 2124 be blue laser echo area, 2125 be blue laser specular scattering area, 213 It is rotating filtering colour wheel for first driving means, 22,221 be annular filter layer, and 222 be the second driving device, and 31 is saturating for optically focused Mirror, 41 be the first spectroscope, and 411 be the first reflecting segment, and 412 be the second reflecting segment, and 413 be transmissive segments, and 42 be the second spectroscope, 51 be red laser speculum, and 52 be the first speculum, and 53 be the second speculum, and 54 be blue laser speculum.
Specific implementation mode
To keep the purpose, technical scheme and advantage of embodiment of the present invention clearer, implement below in conjunction with the present invention Attached drawing in mode carries out clear, complete description, it is clear that described reality to the technical solution in embodiment of the present invention The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability The every other embodiment that domain those of ordinary skill is obtained without making creative work, belongs to the present invention The range of protection.
It should be noted that when element is expressed " being fixed on " another element, it can directly on another element, Or may exist one or more elements placed in the middle therebetween.When an element is expressed " connection " another element, it can be with It is directly to another element or may exist one or more elements placed in the middle therebetween.Used in this specification Term " vertically ", " horizontal ", "left", "right" and similar statement are for illustrative purposes only.
In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other not Conflict is constituted to can be combined with each other.
Embodiment one
Referring to Fig. 1, being a kind of structural schematic diagram for projection light source that embodiment of the present invention provides, the projection light source 1 Applied to optical projection system, including：Blue laser light source 11, red laser light source 12, rotation fluorescence colour wheel 21, rotating filtering colour wheel 22, collector lens 31, the first spectroscope 41, the second spectroscope 42, red laser speculum 51, the first speculum 52 and second are anti- Penetrate mirror 53, also, the blue laser light source 11, red laser light source 12, rotation fluorescence colour wheel 21, rotating filtering colour wheel 22, Collector lens 31, the first spectroscope 41, the second spectroscope 42, red laser speculum 51, the reflection of the first speculum 52 and second Mirror 53 may be contained in same level.
Specifically, blue laser light source 11 is for being emitted blue laser beams, including multiple blue laser luminescence chips (figure Do not show), the first Multiplexing apparatus (not shown) and the first collimation lens set (not shown).Wherein, the luminous core of each blue laser Piece is used to be emitted corresponding blue laser to the first Multiplexing apparatus, and the first Multiplexing apparatus is used to receive corresponding blue laser and will Multi beam blue laser is emitted towards the first collimation lens set, the first collimation lens set for will the multi beam blue laser that be received towards same One direction outgoing, forms a branch of parallel blue laser beams.Above-mentioned first Multiplexing apparatus includes multiple blu-ray reflection mirrors.Its In, each blu-ray reflection mirror is set to the front of a corresponding blue laser luminescence chip, and each blu-ray reflection mirror is used for will The blue laser of corresponding blue laser luminescence chip outgoing is emitted towards the first collimation lens set.Certainly, in some alternative realities It applies in mode, blue laser light source 11 or a blue laser luminescence chip.
Red laser light source 12 for being emitted red laser light beam, including multiple red laser luminescence chip (not shown), Second Multiplexing apparatus (not shown) and the second collimation lens set (not shown).Wherein, each red laser luminescence chip is used for It is emitted corresponding red laser to the second Multiplexing apparatus, the second Multiplexing apparatus is for receiving corresponding red laser and multi beam is red Color laser is emitted towards the second collimation lens set, the second collimation lens set for will the multi beam red laser that be received towards the same side To outgoing, a branch of parallel red laser light beam is formed.Above-mentioned second Multiplexing apparatus includes multiple red mirrors.Wherein, often A red mirror is set to the front of a corresponding red laser luminescence chip, and each red mirror is used for will be corresponding The red laser of red laser luminescence chip outgoing is emitted towards the first collimation lens set.Certainly, in some alternative embodiments In, red laser light source 12 or a red laser luminescence chip.
It please refers to Fig.1 to Fig.3, rotation fluorescence colour wheel 21 includes：Annular reflection diffusion layer 211, annulus fluorescent layer 212 and One driving device 213.
Annular reflection diffusion layer 211 and annulus fluorescent layer 212 is coaxial is set on the working face P1 of rotation fluorescence colour wheel 21, And the internal diameter of annular reflection diffusion layer 211 is consistent with the outer diameter of annulus fluorescent layer 212, i.e. annular reflection diffusion layer 211 and annular Fluorescence coating 212 is disposed adjacent and the annular reflection diffusion layer 211 is located at the outer shroud for the working face P1 for rotating fluorescence colour wheel 21 Side, annulus fluorescent layer 212 are located at the inner ring side of the working face P1 of rotation fluorescence colour wheel 21.
Certainly, in some alternative embodiments, the internal diameter of annular reflection diffusion layer 211 can also be more than annulus fluorescent The outer diameter of layer 212, i.e., there are gaps between annular reflection diffusion layer 211 and annulus fluorescent layer 212.
Wherein, the working face P1 of the rotation fluorescence colour wheel 21 is i.e. towards blue laser light source 11 and red laser light source 12, the surface for receiving blue laser beams and red laser light beam.
Further, annular reflection diffusion layer 211 is used to receive the red laser light beam of the outgoing of red laser light source 12, and The red laser beam spread received is reflected, to eliminate the speckle of red laser light beam.
Annulus fluorescent layer 212 then is used to receive the blue laser beams of the outgoing of blue laser light source 11.Specifically, it please refers to Fig. 3, annulus fluorescent floor 212 include green emitting phosphor area 2121, yellow fluorescent powder area 2122 and blue laser transmission area 2123, institute Green emitting phosphor area 2121, yellow fluorescent powder area 2122 and blue laser transmission area 2123 is stated circumferentially to set along annulus fluorescent floor 212 It sets, and green emitting phosphor area 2121, yellow fluorescent powder area 2122 are identical with the region area of blue laser transmission area 2123.
Certainly, in some embodiments, the green emitting phosphor area 2121, yellow fluorescent powder area 2122 and blue laser The region area of transmission area 2123 can carry out inequality proportion setting according to actual needs.
When blue laser beams are incident to the green emitting phosphor area 2121 of annulus fluorescent floor 212, green emitting phosphor area 2121 absorb the blue laser beams and are excited to reflect green fluorescence；
When blue laser beams are incident to the yellow fluorescent powder area 2122 of annulus fluorescent floor 212, yellow fluorescent powder area 2122 absorb the blue laser beams and are excited to reflect yellow fluorescence；
When blue laser beams are incident to the blue laser transmission area 2123 of annulus fluorescent layer 212, blue laser transmission Area 2123 transmits the blue laser beams.
First driving means 213 are set to relative rotation fluorescence colour wheel 21 for driving rotation fluorescence colour wheel 21 to rotate On another surface of working face P1, it is preferable that first driving means 213 are set to the middle part on the surface, so that the first driving Device 213 can smoothly drive the rotation fluorescence colour wheel 21 to rotate.The first driving means 213 can be motor etc..
Rotating filtering colour wheel 22 includes：Annular filter layer 221 and the second driving device 222.
Annular filter layer 221 is set on the working face P2 of rotating filtering colour wheel 22, total with the rotating filtering colour wheel 22 Axis is arranged, and area is less than the area of the working face P2 of the rotating filtering colour wheel 22, and the annular filter layer 221 is red for receiving Color laser beam, blue laser beams, yellow fluorescence and green fluorescence.
Wherein, the working face P2 of the rotating filtering colour wheel 22 i.e. for receive blue laser beams, red laser light beam, The surface of yellow fluorescence and green fluorescence.
Specifically, annular filter layer 221 includes red filter section (not shown), blue filter section (not shown) and green filter Light section (not shown), the red filter section, blue filter section and green filter section are circumferentially disposed along annular filter layer 221, and And the region area of red filter section, blue filter section and green filter section and the green emitting phosphor area 2121, yellow fluorescence The region area of powder area 2122 and blue laser transmission area 2123 corresponds to.
When blue laser beams, red laser light beam, yellow fluorescence and green fluorescence are incident to the red of annular filter layer 221 When color optical filtering section, which transmits red laser light beam, and can filter the yellow band of yellow fluorescence to transmit Feux rouges, wherein the yellow band of green fluorescence, blue laser beams and yellow fluorescence is filtered out；
When blue laser beams, red laser light beam, yellow fluorescence and green fluorescence are incident to the indigo plant of annular filter layer 221 When color optical filtering section, the blue filter section transmitting blue laser beam, wherein green fluorescence, red color laser beam and yellow Fluorescence is filtered out；
When blue laser beams, red laser light beam, yellow fluorescence and green fluorescence are incident to the green of annular filter layer 221 When color optical filtering section, which transmits green fluorescence, wherein blue laser beams, red color laser beam and yellow Fluorescence is filtered out.
Second driving device 222 is set to relative rotation optical filtering colour wheel 22 for driving rotating filtering colour wheel 22 to rotate On another surface of working face P2, it is preferable that the second driving device 222 is set to the middle part on the surface, so that the second driving Device 222 can smoothly drive the rotating filtering colour wheel 22 to rotate.Second driving device 222 can be motor etc..
Preferably, the second driving device 222 is rotated synchronously with first driving means 213, so that rotation fluorescence colour wheel 21 Green emitting phosphor area 2121 is corresponding with the green filter section of rotating filtering colour wheel 22 so that is reflected from green emitting phosphor area 2121 Green fluorescence can pass through green filter section；Rotate yellow fluorescent powder area 2122 and the rotating filtering colour wheel 22 of fluorescence colour wheel 21 Red filter section correspond to so that the yellow fluorescence reflected from yellow fluorescent powder area 2122 can be by red filter section；Rotation The blue laser transmission area 2123 for turning fluorescence colour wheel 21 is corresponding with the blue filter section of rotating filtering colour wheel 22 so that swashs from blue The blue laser beams that transmitance region 2123 transmits can pass through blue filter section.
Collector lens 31 can be lenticular lens, for converging light.
First spectroscope 41 and the second spectroscope 42 are plane half-reflecting half mirror structure.Wherein, the first spectroscope 41 can Transmitting blue laser beam and red laser light beam, and reflection green fluorescence and yellow fluorescence；Second spectroscope 42 then can be anti- Penetrate blue laser beams, transmission red laser light beam, yellow fluorescence and green fluorescence.
Red laser speculum 51, the first speculum 52 and the second speculum 53 are plane mirror.Wherein, red laser Speculum 51 is then used for reflection blue laser for reflecting red laser light beam, first speculum, 52 and second speculum 53 Light beam.
Certainly, in some alternative embodiments, red laser speculum 51, the first speculum 52 and the second speculum 53 can also be arc-shaped reflecting mirror or curved reflector etc..
Further, blue laser light source 11, red laser light source 12, collector lens 31,41, second points of the first spectroscope Light microscopic 42 and red laser speculum 51 may be contained within the sides working face P1 of rotation fluorescence colour wheel 21, the first speculum 52 and the Two-mirror 53 may be contained within the other sides working face P1 (side far from the working face P1) of rotation fluorescence colour wheel 21, and And
First speculum 52, the annulus fluorescent layer 212 of rotation fluorescence colour wheel 21, collector lens 31, the first spectroscope 41 with And blue laser light source 11 is sequentially located at the first datum line S1, i.e., described first speculum 52, the annular for rotating fluorescence colour wheel 21 Central axis and first datum line of fluorescence coating 212, collector lens 31, the first spectroscope 41 and blue laser light source 11 S1 is overlapped；
The annular optical filtering of red laser speculum 51, the first spectroscope 41, the second spectroscope 42 and rotating filtering colour wheel 22 Layer 221 is sequentially located at the second datum line S2, i.e., the described red laser speculum 51, the first spectroscope 41,42 and of the second spectroscope The central axis of the annular filter layer 221 of rotating filtering colour wheel 22 is overlapped with the second datum line S2；
Second spectroscope 42 and the second speculum 53 are sequentially located at third datum line S3, i.e., second spectroscope 42 with And second the central axis of speculum 53 overlapped with the third datum line S3；
Second speculum 53 and the first speculum 52 are sequentially located at the 4th datum line S4, i.e., second speculum 53 with And first the central axis of speculum 52 overlapped with the 4th datum line S4；
And then off-axis is arranged red laser light source 12, so that its red laser light beam for being emitted and the first datum line S1 shapes At the first off-axis angle a, first off-axis angle a meets formulaWherein, d is the center of annular reflection diffusion layer 211 For loop wire to the distance of the first datum line S1, f is the focal length of collector lens 31.12 off-axis of red laser light source is arranged and ring is set Shape reflection diffusion layer 211 reflects the red laser light beam of the outgoing of the red laser light source 12 so that red laser light source can be with Blue laser light source is set to the same side, rationally using the space between rotation fluorescence colour wheel and blue laser light source, more makes Projection light source is compact-sized, and volume will not be significantly increased because increasing red laser light source.
Wherein, the first datum line S1, the second datum line S2, third datum line S3 and the 4th datum line S4 are generally aligned in the same plane It is interior and be mutually perpendicular to, it is rectangular.
Specifically, the first spectroscope 41 is located between the working face P1 and blue laser light source 11 of rotation fluorescence colour wheel 21, The blue laser light that the working face P1 of the rotation fluorescence colour wheel 21 is emitted perpendicular to the first datum line S1, blue laser light source 11 Beam is overlapped with the first datum line S1, and the first spectroscope 41 is then 45 ° with the angle of the first datum line S1 so that the first spectroscope 41 First surface P3 towards the working face P1 of rotation fluorescence colour wheel 21, second surface P4 is towards blue laser light source 11, described the The annular that one spectroscope 41 is used to the blue laser beams that blue laser light source 11 is emitted being transmitted through rotation fluorescence colour wheel 21 is glimmering Photosphere 212, and the green fluorescence that 212 green emitting phosphor area 2121 of annulus fluorescent floor is reflected and yellow fluorescent powder area 2122 are anti- The yellow fluorescence of injection reflects, and is additionally operable to the red laser light beam of 211 scattered reflection of transmission annular reflection diffusion layer；
Collector lens 31 be then located at rotation fluorescence colour wheel 21 working face P1 and the first spectroscope 41 first surface P3 it Between, perpendicular to the first datum line S1, for the light beam of the working face P1 to being incident to rotation fluorescence colour wheel 21 and from rotation The light beam of the working face P1 outgoing of fluorescence colour wheel 21 carries out optically focused processing so that each light beam can accurately converge to target location；
First speculum 52 be then located at the other side of the working face P1 of rotation fluorescence colour wheel 21 and with first spectroscope 41 is vertical, i.e., the reflecting surface of first speculum 52 rotates fluorescence colour wheel towards the rotation fluorescence colour wheel 21 for reflecting The blue laser beams that 21 blue laser transmission area 2123 is transmitted, to change the direction of blue laser beams；
The reflecting surface of reflecting surface the first speculum 52 of direction of second speculum 53, and the second speculum 53 is parallel to institute The first spectroscope 41 is stated, perpendicular to first speculum 52, is used to reflect the blue laser light of the first speculum 52 reflection Beam changes the direction of blue laser beams again；
Second spectroscope 42 is then parallel to first spectroscope, 41 and second speculum 53, perpendicular to the first speculum 52, facing towards the reflecting surface of the second speculum 53 and the working face P2 of rotating filtering colour wheel 22, one facing towards first is divided one The first surface P3 of mirror 41, the blue laser beams for reflecting the second reflecting surface 53 reflex to the ring of rotating filtering colour wheel 22 Shape filter layer 221, the red laser light beam for being additionally operable to the yellow fluorescence for reflecting the first spectroscope 41 and green fluorescence, transmission are saturating It is incident upon the annular filter layer 221 of rotating filtering colour wheel 22；
(the first spectroscope 41 is separate by the second surface P4 of reflecting surface the first spectroscope 41 of direction of red laser speculum 51 Rotate 21 side of fluorescence colour wheel), and the normal of the red laser speculum 51 and the second datum line S2 form angle b, it should Angle b meets formulaIt is used to the red laser light beam that the first spectroscope 41 transmits reflexing to the first light splitting Mirror 41, and it is transmitted through the second spectroscope 42 through the first spectroscope 41, then it is transmitted through rotating filtering colour wheel 22 through the second spectroscope 42 Annular filter layer 221 carry out optical filtering processing；
Red laser light source 12 is then located remotely from the side of the reflecting surface of red laser speculum 51, with the first datum line S1 Form the first off-axis angle a so that red laser light source can rationally utilize space, compact-sized, even if increasing red laser light The volume of source projection light source will not be significantly increased.
In summary, it is to be understood that referring to Fig. 2, blue laser light source 11 is emitted blue laser beams, the blue Laser beam is transmitted through collector lens 31 through the first spectroscope 41, then the ring of rotation fluorescence colour wheel 21 is converged to through collector lens 31 Shape fluorescence coating 212, it is glimmering by green if the blue laser beams converge to the green emitting phosphor area 2121 of annulus fluorescent floor 212 The areas Guang Fen 2121 absorb and reflect green fluorescence, which is reflected onto collector lens 31 and is converged through collector lens 31 The second spectroscope 42 is reflexed to the first spectroscope 41, then through the first spectroscope 41, then rotation is transmitted through via the second spectroscope 42 The annular filter layer 221 for turning optical filtering colour wheel 22 carries out optical filtering processing；If the blue laser beams converge to annulus fluorescent layer 212 When yellow fluorescent powder area 2122, is absorbed by yellow fluorescent powder area 2122 and reflect yellow fluorescence, which is reflected onto Collector lens 31 simultaneously converges to the first spectroscope 41 through collector lens 31, then reflexes to the second spectroscope through the first spectroscope 41 42, then be transmitted through via the second spectroscope 42 the annular filter layer 221 of rotating filtering colour wheel 22 and carry out optical filtering processing；If the blue When laser beam converges to the blue laser transmission area 2123 of annulus fluorescent layer 212, transmitted via blue laser transmission area 2123 The second speculum 53 is reflexed to the first speculum 52, then through the first speculum 52, then is reflexed to via the second speculum 53 Two spectroscopes 42, then be transmitted through via the second spectroscope 42 the annular filter layer 221 of rotating filtering colour wheel 22 and carry out optical filtering processing； Meanwhile red laser light source 12 is emitted red laser light beam, which is incident to collector lens 31, via poly- Optical lens 31 converges to the annular reflection diffusion layer 211 of rotation fluorescence colour wheel 21, then through 211 scattered reflection of annular reflection diffusion layer To collector lens 31, to change the direction of red laser light beam, then through collector lens 31 red laser speculum 51 is converged to, passed through Red laser speculum 51 reflexes to the first spectroscope 41, then is transmitted through the second spectroscope 42 through the first spectroscope 41, then via The annular filter layer 221 that second spectroscope 42 is transmitted through rotating filtering colour wheel 22 carries out optical filtering processing.
The higher feux rouges of excitation purity, blue light and green light are obtained after 221 optical filtering of annular filter layer processing, it is obtained red The higher white light of colour gamut can be obtained after light, blue light and green light closing light.
The advantageous effect of embodiment of the present invention is：In the case of being different from the prior art, embodiment of the present invention provides A kind of projection light source and its optical projection system, the projection light source include：Blue laser light source, red laser light source, rotation fluorescence Annulus fluorescent layer is arranged in the working face of colour wheel, collector lens, the first spectroscope and red laser speculum, rotation fluorescence colour wheel With annular reflection diffusion layer, and annulus fluorescent layer and annular reflection diffusion layer are disposed adjacent；Wherein, blue laser light source, red Color laser light source, collector lens, the first spectroscope and red laser speculum may be contained within the working face one of rotation fluorescence colour wheel Side, also, the annulus fluorescent layer, collector lens, the first spectroscope and the blue laser light source that rotate fluorescence colour wheel are located at first Datum line, red laser speculum and the first spectroscope are located at the second datum line, and then off-axis is arranged red laser light source, so that The red laser light beam and the first datum line of red laser light source outgoing form the first off-axis angle a.The above embodiment by Increase red laser light source replacement in projection light source and filter out the mode of yellow light to promote the excitation purity of feux rouges, improves projection light source Colour gamut while can not influence projection light source brightness, ensure that brightness and the colour gamut of projection light source；Meanwhile by projecting Annular reflection diffusion layer is set in light source, and red laser light source off-axis is arranged so that red laser light source can swash with blue Radiant is set to the same side, rationally utilizes the space between rotation fluorescence colour wheel and blue laser light source so that projection light source Compact-sized, volume will not be significantly increased because increasing red laser light source.
Embodiment two
Referring to Fig. 4, being a kind of structural schematic diagram for projection light source that embodiment of the present invention provides, the projection light source 1 Applied to optical projection system, the projection light source 1 and the projection light source described in embodiment one are essentially identical, and identical content can be found in implementation Example one, then this no longer repeats one by one.
Its distinguishing characteristics is that the projection light source 1 described in embodiment of the present invention includes：It is blue laser light source 11, red Color laser light source 12, rotation fluorescence colour wheel 21, rotating filtering colour wheel 22, collector lens 31, the first spectroscope 41, red laser are anti- Penetrate mirror 51 and blue laser speculum 54.
Specifically, referring to Fig. 6, the annulus fluorescent floor 212 of rotation fluorescence colour wheel 21 includes green emitting phosphor area 2121, Huang Color fluorescent powder area 2122 and blue laser echo area 2124, the green emitting phosphor area 2121, yellow fluorescent powder area 2122 and indigo plant Color laser reflection area 2124 is circumferentially disposed along annulus fluorescent floor 212, and green emitting phosphor area 2121, yellow fluorescent powder area 2122 It is identical with the region area of blue laser echo area 2124.
Certainly, in some embodiments, the green emitting phosphor area 2121, yellow fluorescent powder area 2122 and blue laser The region area of echo area 2124 can carry out inequality proportion setting according to actual needs.
When blue laser beams are incident to the green emitting phosphor area 2121 of annulus fluorescent floor 212, green emitting phosphor area 2121 absorb the blue laser beams and are excited to reflect green fluorescence；
When blue laser beams are incident to the yellow fluorescent powder area 2122 of annulus fluorescent floor 212, yellow fluorescent powder area 2122 absorb the blue laser beams and are excited to reflect yellow fluorescence；
When blue laser beams are incident to the blue laser echo area 2124 of annulus fluorescent layer 212, blue laser reflection The blue laser beams are reflected in area 2124, so that the blue laser beams can be reflected onto blue laser speculum 54, To change the direction of blue laser beams, using and making compact-sized for optical element can be reduced.
Blue laser speculum 54 is plane mirror, is used for reflection blue laser beam.
Certainly, in some alternative embodiments, blue laser speculum 54 can also be arc-shaped reflecting mirror or song Face speculum etc..
Further, blue laser light source 11, red laser light source 12, collector lens 31, the first spectroscope 41, red swash Light reflection mirror 51 and blue laser speculum 54 may be contained within the sides working face P1 of rotation fluorescence colour wheel 21, also,
Annulus fluorescent layer 212, collector lens 31 and the first spectroscope 41 of rotation fluorescence colour wheel 21 are sequentially located at first Datum line S1, the i.e. center of the annulus fluorescent layer 212 of the rotation fluorescence colour wheel 21, collector lens 31 and the first spectroscope 41 Axis is overlapped with the first datum line S1；
The annular filter layer 221 of red laser speculum 51, the first spectroscope 41 and rotating filtering colour wheel 22 is sequentially located at Second datum line S2, i.e., the described red laser speculum 51, the first spectroscope 41 and rotating filtering colour wheel 22 annular filter layer 221 central axis is overlapped with the second datum line S2；
Blue laser speculum 54 is located at the sides second surface P4 of the first spectroscope 41, be located at the first datum line S1 and Second datum line S2；
Then off-axis is arranged blue laser light source 11, so that its blue laser beams being emitted is formed with the first datum line S1 Second off-axis angle c, second off-axis angle c meet formulaWherein, d2For annulus fluorescent layer 212 sideline to first The distance of datum line S1, f are the focal length of the collector lens；
Also off-axis is arranged red laser light source 12, so that its red laser light beam being emitted is formed with the first datum line S1 First off-axis angle a, first off-axis angle a meet formulaWherein, d is the center ring of annular reflection diffusion layer 211 For line to the distance of the first datum line S1, f is the focal length of collector lens 31.12 off-axis of red laser light source is arranged and annular is set Reflection diffusion layer 211 reflects the red laser light beam of the outgoing of the red laser light source 12 so that red laser light source can be with indigo plant Color laser light source is set to the same side, rationally using the space between rotation fluorescence colour wheel and blue laser light source, more so that throwing Shadow light-source structure is compact, and volume will not be significantly increased because increasing red laser light source.
Wherein, it in the first datum line S1 and the second datum line S2 is generally aligned in the same plane and is mutually perpendicular to.
Specifically, the first spectroscope 41 is located at the working face P1 and blue laser light source 11 and red of rotation fluorescence colour wheel 21 Between color laser light source 12, the working face P1 of the rotation fluorescence colour wheel 21 is perpendicular to the first datum line S1, blue laser light source The blue laser beams of 11 outgoing form the second off-axis angle c with the first datum line S1, and the red that red laser light source 12 is emitted swashs Light light beam and the first datum line S1 form the first off-axis angle a, and the first spectroscope 41 is then 45 ° with the angle of the first datum line S1, So that working face P1s of the first surface P3 of the first spectroscope 41 towards rotation fluorescence colour wheel 21, and first surface P3 also courts To the working face P2 of rotating filtering colour wheel 22, second surface P4 towards blue laser light source 11 and red laser light source 12, and For second surface P4 also towards red laser speculum 51 and blue laser speculum 54, first spectroscope 41 is used for will be red The red laser light beam that color laser light source 12 is emitted is transmitted through the annular reflection diffusion layer 211 of rotation fluorescence colour wheel 21, and transmits Red laser speculum 51 reflect red laser light beam to rotating filtering colour wheel 22 annular filter layer 221；It is additionally operable to ring The yellow fluorescence that the green fluorescence and yellow fluorescent powder area 2122 that 212 green emitting phosphor area 2121 of shape fluorescence coating reflects reflect Reflex to the annular filter layer 221 of rotating filtering colour wheel 22, and the blue laser light that transmitting blue laser reflection area 2124 is reflected Beam, and the blue laser beams that blue laser speculum 54 reflects are transmitted through to the annular filter layer of rotating filtering colour wheel 22 221；
Collector lens 31 be then located at rotation fluorescence colour wheel 21 working face P1 and the first spectroscope 41 first surface P3 it Between, perpendicular to the first datum line S1, for the light beam of the working face P1 to being incident to rotation fluorescence colour wheel 21 and from rotation The light beam of the working face P1 outgoing of fluorescence colour wheel 21 carries out optically focused processing so that each light beam can accurately converge to target location；
(the first spectroscope 41 is separate by the second surface P4 of reflecting surface the first spectroscope 41 of direction of red laser speculum 51 Rotate 21 side of fluorescence colour wheel), and the normal of the red laser speculum 51 and the second datum line S2 form angle b, it should Angle b meets formulaIt is used to rotate the red of 211 scattered reflection of annular reflection diffusion layer of fluorescence colour wheel 21 Color laser beam reflexes to the first spectroscope 41；
(the first spectroscope 41 is separate by the second surface P4 of reflecting surface the first spectroscope 41 of direction of blue laser speculum 54 Rotate 21 side of fluorescence colour wheel), it is adjacent with red laser speculum 51, and the normal of the blue laser speculum 54 and the Two datum line S2 form angle b ' (not shown), and angle b ' meets formulaIt is used for the first spectroscope 41 The blue laser beams of transmission reflex to the first spectroscope 41, to change the direction of blue laser beams.
Embodiment through the invention reduces the use of optical element, and optical element is concentrated on side so that knot Structure is more compact.
In summary, it is to be understood that referring to Fig. 5, blue laser light source 11 is emitted blue laser beams, the blue Laser beam off-axis is incident to collector lens 31, and the annulus fluorescent layer of rotation fluorescence colour wheel 21 is converged to via collector lens 31 212, if the blue laser beams converge to the green emitting phosphor area 2121 of annulus fluorescent floor 212, by green emitting phosphor area 2121 absorb and reflect green fluorescence, which is reflected onto collector lens 31 and converges to first through collector lens 31 Spectroscope 41, then carry out optical filtering processing through the annular filter layer 221 that the first spectroscope 41 is reflexed to rotating filtering colour wheel 22；If When the blue laser beams converge to the yellow fluorescent powder area 2122 of annulus fluorescent floor 212, absorbed by yellow fluorescent powder area 2122 And yellow fluorescence is reflected, which is reflected onto collector lens 31 and converges to the first spectroscope through collector lens 31 41, then reflex to through the first spectroscope 41 the annular filter layer 221 of rotating filtering colour wheel 22 and carry out optical filtering processing；If the blue swashs When light light beam converges to the blue laser echo area 2124 of annulus fluorescent layer 212, reflexed to via blue laser echo area 2124 Collector lens 31, then the first spectroscope 41 is converged to via collector lens 31, it is transmitted through blue laser via the first spectroscope 41 Speculum 54, and the first spectroscope 41 is reflexed to via the blue laser speculum 54, finally it is transmitted through by the first spectroscope 41 The annular filter layer 221 of rotating filtering colour wheel 22 carries out optical filtering processing；Meanwhile red laser light source 12 is emitted red laser light Beam, the red laser light beam off-axis are incident to the first spectroscope 41, and collector lens 31 is transmitted through via the first spectroscope 41, via Collector lens 31 converges to the annular reflection diffusion layer 211 of rotation fluorescence colour wheel 21, then is spread instead through annular reflection diffusion layer 211 It is incident upon collector lens 31, to change the direction of red laser light beam, then through collector lens 31 converges to red laser speculum 51, The first spectroscope 41 is reflexed to through red laser speculum 51, then is transmitted through the ring of rotating filtering colour wheel 22 through the first spectroscope 41 Shape filter layer 221 carries out optical filtering processing.
The higher feux rouges of excitation purity, blue light and green light are obtained after 221 optical filtering of annular filter layer processing, it is obtained red The higher white light of colour gamut can be obtained after light, blue light and green light closing light.
The advantageous effect of embodiment of the present invention is：In the case of being different from the prior art, embodiment of the present invention provides A kind of projection light source and its optical projection system, the projection light source include：Blue laser light source, red laser light source, rotation fluorescence Annulus fluorescent layer is arranged in the working face of colour wheel, collector lens, the first spectroscope and red laser speculum, rotation fluorescence colour wheel With annular reflection diffusion layer, and annulus fluorescent layer and annular reflection diffusion layer are disposed adjacent；Wherein, blue laser light source, red Color laser light source, collector lens, the first spectroscope and red laser speculum may be contained within the working face one of rotation fluorescence colour wheel Side, also, the annulus fluorescent layer, collector lens, the first spectroscope and the blue laser light source that rotate fluorescence colour wheel are located at first Datum line, red laser speculum and the first spectroscope are located at the second datum line, and then off-axis is arranged red laser light source, so that The red laser light beam and the first datum line of red laser light source outgoing form the first off-axis angle a.The above embodiment by Increase red laser light source replacement in projection light source and filter out the mode of yellow light to promote the excitation purity of feux rouges, improves projection light source Colour gamut while can not influence projection light source brightness, ensure that brightness and the colour gamut of projection light source；Meanwhile by projecting Annular reflection diffusion layer is set in light source, and red laser light source off-axis is arranged so that red laser light source can swash with blue Radiant is set to the same side, rationally utilizes the space between rotation fluorescence colour wheel and blue laser light source so that projection light source Compact-sized, volume will not be significantly increased because increasing red laser light source.
Embodiment three
Referring to Fig. 7, being a kind of structural schematic diagram for projection light source that embodiment of the present invention provides, the projection light source 1 Applied to optical projection system, the projection light source 1 and the projection light source described in embodiment one are essentially identical, and identical content can be found in implementation Example one, then this no longer repeats one by one.
Its distinguishing characteristics is that the projection light source 1 described in embodiment of the present invention includes：It is blue laser light source 11, red Color laser light source 12, rotation fluorescence colour wheel 21, rotating filtering colour wheel 22, collector lens 31, the first spectroscope 41 and red laser Speculum 51.
Specifically, referring to Fig. 9, the annulus fluorescent floor 212 of rotation fluorescence colour wheel 21 includes green emitting phosphor area 2121, Huang Color fluorescent powder area 2122 and blue laser specular scattering area 2125, the green emitting phosphor area 2121, yellow fluorescent powder area 2122 It is circumferentially disposed along annulus fluorescent floor 212 with blue laser specular scattering area 2125, and green emitting phosphor area 2121, yellow fluorescence Powder area 2122 is identical with the region area in blue laser specular scattering area 2125.
Certainly, in some embodiments, the green emitting phosphor area 2121, yellow fluorescent powder area 2122 and blue laser The region area in specular scattering area 2125 can carry out inequality proportion setting according to actual needs.
When blue laser beams are incident to the green emitting phosphor area 2121 of annulus fluorescent floor 212, green emitting phosphor area 2121 absorb the blue laser beams and are excited to reflect green fluorescence；
When blue laser beams are incident to the yellow fluorescent powder area 2122 of annulus fluorescent floor 212, yellow fluorescent powder area 2122 absorb the blue laser beams and are excited to reflect yellow fluorescence；
When blue laser beams are incident to the blue laser specular scattering area 2125 of annulus fluorescent floor 212, blue laser Blue laser beams described in 2125 scattered reflection of specular scattering area, to eliminate blue laser beams speckle, and expand blue laser The reflection angle of light beam so that blue laser beams can be reflected onto the first reflecting segment 411 and the second reflecting segment 412, reduce The use of speculum so that structure is more compact, and reduces the volume of projection light source to a certain extent.
First spectroscope 41 includes the first reflecting segment 411, the second reflecting segment 412 and transmissive segments 413, which sets It is placed between the first reflecting segment 411 and the second reflecting segment 412.Wherein, the first reflecting segment 411 and the second reflecting segment 412 are for anti- Penetrate blue laser beams, yellow fluorescence and green fluorescence；Transmissive segments 413 are used for transmitting blue laser beam and red laser light Beam reflects yellow fluorescence and green fluorescence, therefore the length of transmissive segments 413 is not less than the spot diameter of blue laser beams, so that The transmissive segments 413 can completely transmit blue laser beams, and the smaller blue light loss of length of the transmissive segments 413 is smaller.
Further, blue laser light source 11, red laser light source 12, collector lens 31, the first spectroscope 41 and red Laser mirror 51 may be contained within the sides working face P1 of rotation fluorescence colour wheel 21, also,
Rotate annulus fluorescent layer 212, collector lens 31, the first spectroscope 41 and the blue laser light source of fluorescence colour wheel 21 11 are sequentially located at the first datum line S1, i.e., the described annulus fluorescent layer 212 for rotating fluorescence colour wheel 21,31, first points of collector lens Light microscopic 41 and the central axis of blue laser light source 11 are overlapped with the first datum line S1；
The annular filter layer 221 of red laser speculum 51, the first spectroscope 41 and rotating filtering colour wheel 22 is sequentially located at Second datum line S2, i.e., the described red laser speculum 51, the first spectroscope 41 and rotating filtering colour wheel 22 annular filter layer 221 central axis is overlapped with the second datum line S2；
Then off-axis is arranged red laser light source 12, so that its red laser light beam being emitted is formed with the first datum line S1 First off-axis angle a, first off-axis angle a meet formulaWherein, d is the center ring of annular reflection diffusion layer 211 For line to the distance of the first datum line S1, f is the focal length of collector lens 31.12 off-axis of red laser light source is arranged and annular is set Reflection diffusion layer 211 reflects the red laser light beam of the outgoing of the red laser light source 12 so that red laser light source can be with indigo plant Color laser light source is set to the same side, rationally using the space between rotation fluorescence colour wheel and blue laser light source, more so that throwing Shadow light-source structure is compact, and volume will not be significantly increased because increasing red laser light source.
Wherein, it in the first datum line S1 and the second datum line S2 is generally aligned in the same plane and is mutually perpendicular to.
Specifically, the first spectroscope 41 is located between the working face P1 and blue laser light source 11 of rotation fluorescence colour wheel 21, The blue laser light that the working face P1 of the rotation fluorescence colour wheel 21 is emitted perpendicular to the first datum line S1, blue laser light source 11 Beam is overlapped with the first datum line S1, and the first spectroscope 41 is then 45 ° with the angle of the first datum line S1 so that the first spectroscope 41 First surface P3 towards the working face P1 of rotation fluorescence colour wheel 21, and first surface P3 is also towards rotating filtering colour wheel 22 Working face P2, second surface P4 is towards blue laser light source 11, and second surface P4 is also towards red laser speculum 51, the transmissive segments 413 of first spectroscope 41 are used to the blue laser beams that blue laser light source 11 is emitted being transmitted through rotation Turn the annulus fluorescent layer 212 of fluorescence colour wheel 21, the first reflecting segment 411, the second reflecting segment 412 and transmissive segments 413 are by annulus fluorescent The yellow fluorescence that the green fluorescence and yellow fluorescent powder area 2122 that 212 green emitting phosphor area 2121 of floor reflects reflect reflexes to The annular filter layer 221 of rotating filtering colour wheel 22；First reflecting segment 411 and the second reflecting segment 412 are by the indigo plant of annulus fluorescent layer 212 The blue laser beams of 2125 scattered reflection of color laser reflection fringe area reflex to the annular filter layer of rotating filtering colour wheel 22 221；First spectroscope 41 is additionally operable to the red laser light beam and red laser of 211 scattered reflection of transmission annular reflection diffusion layer The red laser light beam that reflector element 51 reflects；
Collector lens 31 be then located at rotation fluorescence colour wheel 21 working face P1 and the first spectroscope 41 first surface P3 it Between, perpendicular to the first datum line S1, for the light beam of the working face P1 to being incident to rotation fluorescence colour wheel 21 and from rotation The light beam of the working face P1 outgoing of fluorescence colour wheel 21 carries out optically focused processing so that each light beam can accurately converge to target location；
(the first spectroscope 41 is separate by the second surface P4 of reflecting surface the first spectroscope 41 of direction of red laser speculum 51 Rotate 21 side of fluorescence colour wheel), and the normal of the red laser speculum 51 and the second datum line S2 form angle b, it should Angle b meets formulaIt is used to the red laser light beam that the first spectroscope 41 transmits reflexing to the first light splitting Mirror 41, and the annular filter layer 221 for being transmitted through through the first spectroscope 41 rotating filtering colour wheel 22 carries out optical filtering processing；
Red laser light source 12 is then located remotely from the side of the reflecting surface of red laser speculum 51, with the first datum line S1 Form the first off-axis angle a so that red laser light source can rationally utilize space, compact-sized, even if increasing red laser light The volume of source projection light source will not be significantly increased.
Embodiment through the invention reduces the use of speculum, reduces the volume of projection light source to a certain extent, together When, by the way that optical element is concentrated on side so that structure is more compact.
In summary, it is to be understood that referring to Fig. 8, blue laser light source 11 is emitted blue laser beams, the blue Transmissive segments 413 of the laser beam through the first spectroscope 41 are transmitted through collector lens 31, then through collector lens 31 to converge to rotation glimmering The annulus fluorescent layer 212 of photochromic wheel 21, if the blue laser beams converge to the green emitting phosphor area 2121 of annulus fluorescent floor 212 When, green fluorescence is absorbed and reflects by green emitting phosphor area 2121, which is reflected onto collector lens 31 and through poly- Optical lens 31 converges to the first spectroscope 41, then the annular filter layer of rotating filtering colour wheel 22 is reflexed to through the first spectroscope 41 221 carry out optical filtering processing；It is yellow if the blue laser beams converge to the yellow fluorescent powder area 2122 of annulus fluorescent floor 212 Color fluorescent powder area 2122 absorbs and reflects yellow fluorescence, which is reflected onto collector lens 31 and through collector lens 31 The first spectroscope 41 is converged to, then reflexes to through the first spectroscope 41 the annular filter layer 221 of rotating filtering colour wheel 22 and is filtered Light processing；If the blue laser beams converge to the blue laser specular scattering area 2125 of annulus fluorescent floor 212, via blue 2125 scattered reflection of laser reflection fringe area to the first reflecting segment 411 of the first spectroscope 41 and the second reflecting segment 412 reflexes to The annular filter layer 221 of rotating filtering colour wheel 22 carries out optical filtering processing, is lost from transmissive segments 413 with to reduce blue laser beams Situation, at this point, the length of the transmissive segments 413 is smaller, the loss of blue laser beams is smaller；Meanwhile red laser light source 12 goes out Red laser light beam is penetrated, which is incident to collector lens 31, and it is glimmering to converge to rotation via collector lens 31 The annular reflection diffusion layer 211 of photochromic wheel 21, then through 211 scattered reflection of annular reflection diffusion layer to collector lens 31, to change The direction of red laser light beam, then red laser speculum 51 is converged to through collector lens 31, it is anti-through red laser speculum 51 It is incident upon the first spectroscope 41, then the second spectroscope 42 is transmitted through through the first spectroscope 41, then is transmitted through via the second spectroscope 42 The annular filter layer 221 of rotating filtering colour wheel 22 carries out optical filtering processing.
The higher feux rouges of excitation purity, blue light and green light are obtained after 221 optical filtering of annular filter layer processing, it is obtained red The higher white light of colour gamut can be obtained after light, blue light and green light closing light.
The advantageous effect of embodiment of the present invention is：In the case of being different from the prior art, embodiment of the present invention provides A kind of projection light source and its optical projection system, the projection light source include：Blue laser light source, red laser light source, rotation fluorescence Annulus fluorescent layer is arranged in the working face of colour wheel, collector lens, the first spectroscope and red laser speculum, rotation fluorescence colour wheel With annular reflection diffusion layer, and annulus fluorescent layer and annular reflection diffusion layer are disposed adjacent；Wherein, blue laser light source, red Color laser light source, collector lens, the first spectroscope and red laser speculum may be contained within the working face one of rotation fluorescence colour wheel Side, also, the annulus fluorescent layer, collector lens, the first spectroscope and the blue laser light source that rotate fluorescence colour wheel are located at first Datum line, red laser speculum and the first spectroscope are located at the second datum line, and then off-axis is arranged red laser light source, so that The red laser light beam and the first datum line of red laser light source outgoing form the first off-axis angle a.The above embodiment by Increase red laser light source replacement in projection light source and filter out the mode of yellow light to promote the excitation purity of feux rouges, improves projection light source Colour gamut while can not influence projection light source brightness, ensure that brightness and the colour gamut of projection light source；Meanwhile by projecting Annular reflection diffusion layer is set in light source, and red laser light source off-axis is arranged so that red laser light source can swash with blue Radiant is set to the same side, rationally utilizes the space between rotation fluorescence colour wheel and blue laser light source so that projection light source Compact-sized, volume will not be significantly increased because increasing red laser light source.
Example IV
Embodiment of the present invention also provides a kind of optical projection system, which includes the projected light described in above example Source 1, display chip and projection lens.
In some embodiments, the optical projection system further include shell, square rod either fly's-eye lens, prism group or from By toroidal lens group.Wherein, shell formed accommodating cavity, projection light source 1, shell, square rod either fly's-eye lens, prism group or from It is installed in the accommodating cavity of shell by toroidal lens group and display chip；Shell is additionally provided with an opening, and the opening is by shell Accommodating cavity is connected with the exterior space of shell, and projection lens is installed on the opening.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other Technical field is included within the scope of the present invention.

Claims (11)

1. a kind of projection light source, which is characterized in that including：
Blue laser light source (11), red laser light source (12), rotation fluorescence colour wheel (21), collector lens (31), the first light splitting Mirror (41) and red laser speculum (51)；
The working face setting annulus fluorescent layer (212) and annular reflection diffusion layer (211) of the rotation fluorescence colour wheel (21), it is described Annulus fluorescent layer (212) and the annular reflection diffusion layer (211) are disposed adjacent；
The blue laser light source (11), red laser light source (12), collector lens (31), the first spectroscope (41) and red swash Light reflection mirror (51) may be contained within the working face side of the rotation fluorescence colour wheel (21), also,
Annulus fluorescent layer (212), the collector lens (31), first spectroscope (41) of the rotation fluorescence colour wheel (21) And the blue laser light source (11) is located at the first datum line (S1),
The red laser speculum (51) and first spectroscope (41) are located at the second datum line (S2),
Red laser light source (12) off-axis setting so that the red laser light beam of the red laser light source (12) outgoing with First datum line (S1) forms the first off-axis angle a.
2. projection light source according to claim 1, which is characterized in that
First datum line (S1) and second datum line (S2) are mutually perpendicular to；
The first off-axis angle a meets formulaWherein, d is annular reflection diffusion layer center loop wire described in The distance of first datum line (S1), f are the focal length of the collector lens.
3. projection light source according to claim 2, which is characterized in that
The angle of first spectroscope (41) and first datum line (S1) is 45 °；
The red laser speculum (51) is set to first spectroscope (41) far from the rotation fluorescence colour wheel (21) one Side；
The normal of the red laser speculum (51) and the angle b of second datum line (S2) meet formula
4. according to the projection light source described in claim 1-3 any one, which is characterized in that
The annulus fluorescent layer (212) includes：Blue laser transmission area (2123), yellow fluorescent powder area (2122) and green fluorescence Powder area (2121)；
The projection light source (1) further includes：First speculum (52), the second speculum (53) and the second spectroscope (42)；
Second spectroscope (42) is set to the side of the working face of the rotation fluorescence colour wheel (21),
First speculum (52) and second speculum (53) are set to the working face of the rotation fluorescence colour wheel (21) The other side, also,
Annulus fluorescent layer (212), the collector lens of first speculum (52), the rotation fluorescence colour wheel (21) (31), first spectroscope (41) and the blue laser light source (11) are located at the first datum line (S1),
The red laser speculum (51), first spectroscope (41) and second spectroscope (42) are located at the second base Directrix (S2),
Second spectroscope (42) and second speculum (53) are located at third datum line (S3),
Second speculum (53) and first speculum (52) are located at the 4th datum line (S4).
5. projection light source according to claim 4, which is characterized in that
First datum line (S1), the second datum line (S2), third datum line (S3) and the 4th datum line (S4) are rectangular；
Second speculum (53) and the second spectroscope (42) are parallel to first spectroscope (41), and described second is anti- It penetrates mirror (53), the first spectroscope (41) and the second spectroscope (42) and is each perpendicular to first speculum (52).
6. according to the projection light source described in claim 1-3 any one, which is characterized in that
The annulus fluorescent layer (212) includes：Blue laser echo area (2124), yellow fluorescent powder area (2122) and green fluorescence Powder area (2121)；
The projection light source (1) further includes：Blue laser speculum (54)；
Blue laser light source (11) off-axis setting so that the blue laser beams of the blue laser light source (11) outgoing with First datum line (S1) forms the second off-axis angle c.
7. projection light source according to claim 6, which is characterized in that
The second off-axis angle c meets formulaWherein, d2For the annulus fluorescent layer sideline to described first The distance of datum line (S1), f are the focal length of the collector lens.
8. according to the projection light source described in right 1-3 any one, which is characterized in that
The annulus fluorescent layer (212) includes：Blue laser specular scattering area (2125), yellow fluorescent powder area (2122) and green Fluorescent powder area (2121)；
First spectroscope (41) includes：First reflecting segment (411), the second reflecting segment (412) and transmissive segments (413)；
The transmissive segments (413) are set between first reflecting segment (411) and the second reflecting segment (412)；
The transmissive segments (413) reflect other color beams for transmiting blue light and feux rouges.
9. projection light source according to claim 8, which is characterized in that the length of the transmissive segments (413) is not less than blue light Spot diameter, also, the smaller blue light loss of length of the transmissive segments (413) is smaller.
10. according to projection light source described in any one of claim 1-9, which is characterized in that the projection light source (1) is also wrapped It includes：
Rotating filtering colour wheel (22)；
The annular filter layer (221) of working face setting of the rotating filtering colour wheel (22), the ring of the rotating filtering colour wheel (22) Shape filter layer (221) is located at second datum line (S2).
11. a kind of optical projection system, which is characterized in that including：Display chip, projection lens and such as claim 1-10 are any one Projection light source described in.
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