CN105093794B - Double-color laser light source - Google Patents
Double-color laser light source Download PDFInfo
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- CN105093794B CN105093794B CN201510509918.3A CN201510509918A CN105093794B CN 105093794 B CN105093794 B CN 105093794B CN 201510509918 A CN201510509918 A CN 201510509918A CN 105093794 B CN105093794 B CN 105093794B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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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
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Abstract
The invention discloses a double-color laser light source which comprises a blue laser and a red laser which emit blue laser light and red laser light respectively; and a fluorescent wheel, the surface of which is coated with green fluorescent powders, wherein the green fluorescent powders emit green fluorescence when excited by the blue laser light. The double-color laser light source also comprises a speckle dissipation system. The speckle dissipation system comprises a first diffusion portion which is controlled to rotate, is arranged in a beam shaping optical path of the blue laser light and red laser light and is used for diffusing the blue laser light and the red laser light; and a second diffusion portion which is controlled to rotate, is arranged before a blue laser light, red laser light and green fluorescence incident light bar, and is used for at least penetrating the blue laser light and the red laser light sequentially and forming blue light and red light output. The double-color laser light source can effectively reduce speckle effect and improve display quality of projected images.
Description
Technical field
The present invention relates to field of projection display, more particularly, to a kind of two-color laser light source.
Background technology
Laser is a kind of high brightness, and high directivity sends the light source of monochromatic coherent light bundle, due to the plurality of advantages of laser,
In recent years by gradually as light source applications in projection display technique field.But the high coherence due to laser, inevitable real estate
Raw speckle effect, this phenomenon not only be used pure laser as the scheme of light source in be especially apparent, exist in laser and glimmering
In light, and the scheme of mixing light source of laser and led.So-called speckle refers to that coherent source, when irradiating coarse object, dissipates
After penetrating light, because its wavelength is identical, phase-constant, interference will be produced in space, in space some parts occur dry
Relate to mutually long, have part to interfere cancellation, final result is that granular light and dark speckle on screen,
It is exactly some unfocused smudgings, long-time viewing is also easy to produce spinning sensation, and this undoubtedly can cause under projected image quality
Fall, reduces the viewing experience of user.
The application of two-color laser improves the overall brightness of LASER Light Source, meets the brightness applications need of current laser projection
Ask, but the speckle issue that laser brings in itself also increases therewith, become an obstacle of its popularization and application.
How to reduce laser while applying two-color laser light source is become urgently due to the speckle effect that self character brings
Technical problem to be solved.
Content of the invention
The invention provides a kind of two-color laser light source, by controlled the first diffusion part being rotated and the second diffusion part group
Become dissipation speckle system, dissipation speckle can be carried out to blue laser and red laser simultaneously, effectively weaken speckle phenomena, solve existing
There is the technical problem leading to projected image quality to reduce in technology due to the speckle effect brought using LASER Light Source.
The present invention is achieved by the following technical solutions:
A kind of two-color laser light source, including blue laser and red laser, sends blue laser respectively and redness swashs
Light；Fluorescent wheel, its surface-coated has green emitting phosphor, and green emitting phosphor is excited by blue laser and sends green fluorescence, also includes
Dissipation speckle system, this dissipation speckle system includes:
First diffusion part, the first diffusion part is controlled to be rotated, and is arranged at the beam shaping of blue laser and red laser
In light path, for spreading blue laser and red laser；
And second diffusion part, the second diffusion part is controlled to be rotated, and is arranged at blue laser, red laser and green fluorescence
Before incident optical wand, for timing transmissive at least for blue laser and red laser and form blue light, HONGGUANG output；
Further, the first diffusion part is diffusion sheet material, and its surface-coated has diffuser；
Further, the angle of divergence of the diffuser of the first diffusion part is in gradually along the radially outside of the first diffusion part
Reduce rule distribution；
Further, the second diffusion part includes diffusion region and non-diffusing area, and diffusion region is used for through blue laser and redness
Laser, non-diffusing area is used for passing through green fluorescence；
Further, the diffusion region of the second diffusion part is diffusion sheet material, and its surface-coated has diffuser；
Further, non-diffusing area is green color filter or transparent material, for entering optical wand through green fluorescence；
Further, the diffusion region of the second diffusion part includes blue laser diffusion region and red laser diffusion region, for
When second diffusion part rotates, timing ground passes through blue laser and described red laser；
Further, red laser diffusion region includes many sub- diffusion regions, and many sub- diffusion regions dissipate to red laser
Angle is different；
Further, it is located at the sub- diffusion region of the zone line dispersion angle to described red laser in many sub- diffusion regions
More than the dispersion angle to described red laser positioned at the sub- diffusion region of two side areas；
Further, the area of the sub- diffusion part being located at zone line in many sub- diffusion parts is more than positioned at two side areas
The area of sub- diffusion part.
Technical solution of the present invention, at least has following Advantageous Effects or an advantage:
Because the proliferation part of motion is compared to static proliferation part, static proliferation part is using increase laser light
Destroying the condition of this generation of phase-constant interference, but influence degree is limited for the space phase of bundle, and the proliferation part moving
Random phase that can be to laser beam increase spatially, the generation of random phase is it is possible to largely to destroy phase place permanent
The condition that this generation fixed is interfered, such that it is able to the preferable coherence reducing laser beam, weakens LASER Light Source projected image
On speckle phenomena.Technical solution of the present invention utilizes this principle, first in the beam shaping light of blue laser and red laser
First diffusion part is set in road, and the first diffusion part is controlled to be rotated, for spreading blue laser or red laser, no matter right
Blue laser beams or laser beam all can be by the random phases spatially of increase laser beam, reduction laser beam
Coherence；And the second diffusion part, the second expansion are set before blue laser and red laser and green fluorescence incidence optical wand
Scattered portion is controlled to be rotated, and timing, transmissive at least for blue laser and red laser, is diffused again to the laser after closing light,
Produce random phase spatially further, the proliferation part effect of two motions is overlapped mutually, and laser beam is disappeared
Relevant, thus the LASER Light Source for projection can form more independent speckle pattern on projection images, and independent speckle
The number of pattern is more, using the integral action of human eye, the phenomenon of light and shade speckle weaker such that it is able to effectively weaken laser
Speckle effect, improves projected image display quality.
Simultaneously as the first diffusion part is controlled being moved, and it is arranged in beam shaping light path, can be to laser beam
Diffusion simultaneously works as homogenizing the effect of light spot energy, thus pass through minimizing energy during optical glass beneficial to laser beam excessively concentrating
Energy density is high and cause opticses heating too fast or deposition dust situation occurs in other words, simultaneously facilitates after homogenizing
Blue laser beams excite to fluorescent wheel, improve the launching efficiency of fluorescence, it is to avoid light spot energy is uneven, and energy concentrates temperature
Spend journey and cause the calcination of fluorescence wheel surface..
Further, in technical solution of the present invention, the second diffusion part includes diffusion region and non-diffusing area, and diffusion region is used for
Transmission to blue laser and red laser dissipation speckle, rather than diffusion region is used for passing through green fluorescence, has concurrently and LASER Light Source is disappeared
Speckle and the effect exporting three primary colours for system, it is possible to reduce the use of colour filter wheel component, thus beneficial to simplification light-source system frame
Structure.
Further, technical solution of the present invention, the dissipation speckle for blue laser and red laser shares by the first diffusion
Portion and the dissipation speckle system of the second diffusion part composition, non-is not to carry out dissipation speckle light path design respectively for every road laser, reduces
The complexity of light source optical path, improves dissipation speckle efficiency.
Brief description
Fig. 1 is the embodiment of the present invention 1 two-color laser light-source structure schematic diagram；
Fig. 2 is the embodiment of the present invention 2 two-color laser light-source structure schematic diagram；
Fig. 3 a, Fig. 3 b is for being the laser facula schematic shapes after proliferation part in the embodiment of the present invention 2；
Fig. 4 is the first diffusion part schematic diagram in the embodiment of the present invention 2；
Fig. 5 is fluorescent wheel plane distribution schematic diagram in the embodiment of the present invention 2；
Fig. 6 is the second diffusion sheet schematic diagram in the embodiment of the present invention 2；
Fig. 7 is another second diffusion sheet subregion schematic diagram in the embodiment of the present invention 2；
Fig. 8 is laser beam energy Gauss distribution schematic diagram in the embodiment of the present invention 2.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
One step ground describes in detail it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole enforcement
Example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
All other embodiment, broadly falls into the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention 1 provides a kind of two-color laser light source, as shown in figure 1, including blue laser array 11 He
Red laser array 12, sends blue laser and red laser, fluorescent wheel 4, its surface-coated has green emitting phosphor, green respectively
Color fluorescent material is excited by blue laser and sends green fluorescence, and wherein, blue laser and red laser are entering fluorescent wheel 4 and closing light
Also shaping to be carried out through light-beam forming unit 2 before part 5, include the first of dissipation speckle system 3 in light-beam forming unit 2
Diffusion part 31, the wherein first diffusion part 31 is controlled to be rotated, in the beam shaping light path of blue laser and red laser,
For spreading this blue laser and red laser.Blue laser reflexes to fluorescent wheel through closing light part 5, and through fluorescent wheel transmission
Arrive again at closing light part 5 with relaying loop optical path, and be reflected out, red laser and green fluorescence group are respectively through closing light
The reflection of part 5 and transmission, three kinds of color mixture form white closing light.Second diffusion part 32 is controlled to be rotated, as one fortune
Dynamic proliferation part, before it is arranged at blue laser, red laser and green fluorescence incidence optical wand 6, for timing ground extremely
Pass through blue laser and red laser less, due to carrying out transmission blueness and the red laser of timing by rotation, such that it is able to
Form output blue light and the HONGGUANG of timing, may be used for system output three primary colours.Second diffusion part 32 and the first diffusion part
The dissipation speckle system of 31 composition embodiment of the present invention LASER Light Sources.
Optical wand 6 is collected three primary colours light and is entered x ray machine part (in figure does not go out), and realizing LASER Light Source provides photograph for x ray machine part
Bright.
In embodiments of the present invention, because blue laser and red laser pass sequentially through the first of dissipation speckle system 3 and spread
Portion and the second diffusion part, can carry out dissipation speckle to blue laser and red laser using two proliferation parts of motion simultaneously,
Solve the technical problem of the projected image display quality difference brought when two-color laser light source uses due to speckle effect；Same luck
The first dynamic diffusion part can also simultaneously work as homogenizing the effect of light spot energy simultaneously to laser beam diffusion, thus being beneficial to laser
Light beam cause opticses heating too fast by reducing energy excessively to concentrate energy density in other words high during optical glass or
The situation of deposition dust occurs, and simultaneously facilitates the blue laser beams after homogenizing and fluorescent wheel is excited, and improves swashing of fluorescence
Send out efficiency, it is to avoid light spot energy is uneven, energy concentrates temperature course to cause the calcination of fluorescence wheel surface；And second diffusion
Output blue light and the HONGGUANG that timing is gone back in the effect of dissipation speckle simultaneously is playing, to blue laser and red laser diffusion, successively in portion, can
For providing three primary colours output for system.
Embodiment 2
The embodiment of the present invention 2 provides a kind of LASER Light Source, as shown in Fig. 2 the blue laser for output blue laser
The red laser array 12 of device array 11 and output red laser is arranged vertically, and the light beam that array arranged vertically sends is also mutual
Perpendicular.This arrangement mode is beneficial to reduce the volume shared by laser instrument, is conducive to sharing of light-beam forming unit simultaneously.
Because the laser facula that laser instrument sends there may be brightness disproportionation, and the problem that beam area is excessive, Jin Erzao
One-tenth opticses light transmission rate is low, and fluorescence excitation efficiency is low, and laser beam diffusion angle leads to swash more than optical wand collection angle
The light collection efficiency low impact problems such as projection light source brightness it is therefore desirable to reflect to laser, a series of light such as refraction
Bundle shaping, reduces its angle of divergence, reduces beam area, and homogenizes light spot energy, could quilt through the laser beam of beam shaping
For illuminating, and the fluorescence excitation for follow-up fluorescent wheel.
Wherein, the first diffusion part is fixedly installed in blue laser and the beam shaping light path of red laser, specifically may be used
It is arranged at the rear end of beam shaping light path, for spreading described blue laser and red laser.As described in Figure 2, beam shaping dress
Put 2 and include a mirror unit 21, convex lenss 22 and concavees lens 23, and preferably light-beam forming unit 2 is gone back
Including the first diffusion part 31 after concavees lens, the first diffusion part 31 is fixedly installed.Convex lenss 22 and concavees lens 23 form
Telescopic system.Light-beam forming unit carries out to blue laser and red laser closing bundle, shrink beam, homogenized Shape correction successively.
Wherein, before mirror unit 21 is located at blueness and red laser array, and with this two laser arrays all in 45 °
Angle is placed.Mirror unit 21 can have spaced reflecting mirror by one group and form, and reflecting mirror optic portion can reflect one
Plant light source, mirror separation can allow for transmission another kind light source.Thus only using a mirror unit it is possible to realize right
To a kind of reflection of light source in the middle of blueness and red laser light source, and the transmission to another kind of light source, this two can either be swashed
The light beam of optical arrays output reduces beam spacing the consistent synthesis light beam of outbound course, can reach the mesh of compact conformation again
's.
Preferably, blue laser and red laser are before reaching mirror unit 21, also each saturating through a collimation
Mirror (not shown) is collimated, and to reduce the angle of divergence of laser, so that more light quantities is reached or pass through mirror unit, from
And improve the shaping efficiency of laser.
Reflected mirror unit 21 closes the blue laser after restrainting and red laser passes sequentially through convex lenss 41 and 42 groups of concavees lens
The telescopic system becoming, the effect of microscope group of herein looking in the distance is by further for laser beam shrink beam, reduces spot size light in other words
The area of bundle, improves transmitance in back-end optical device for the light beam.
After telescopic system, blue laser and red laser are after the first diffusion part 31 carries out spreading for the first time
Project, wherein, blue laser is incident to fluorescent wheel 4 through after the first diffusion part 31, after red laser passes through the first diffusion part 31
It is incident to closing light part 5.No matter for red laser or blue laser, this first diffusion part can be carried out to laser beam
Diffusion, on the one hand can be increased the space random phase of laser beam, destroy what this generation of phase-constant was interfered by motion
Condition, thus reach the purpose of certain dissipation speckle；On the other hand the effect homogenizing light spot energy can be played to laser beam,
This point is particularly important for blue laser, because blue laser is using the excitation light as fluorescent wheel, if hot spot does not enter
Row homogenizes, and is likely to result in due to laser light spot intensity skewness, local energy is concentrated, when being directly incident on fluorescence wheel surface,
The greater concentration of laser facula of light intensity can produce hyperpyrexia and then produce calcination damage to fluorescence wheel surface, lead to not normally swash
Fluoresce, simultaneously no matter for red laser and blue laser, light spot energy all can after homogenizing when by subsequent optical part
Reduce energy excessively to concentrate energy density in other words high and cause opticses heating too fast or situation generation that is depositing dust.
This first diffusion part 31 is arranged at the rear end of beam shaping light path, allows for laser and passes through shrink beam, hot spot
Area is less, is transferred in following optical system beneficial to by optical glass, is now diffused again, can improve sharp
The diffuser efficiency of light light beam, meanwhile, in order to reach the condition that incident fluorescence wheel excited it is also necessary to will carry out last
Light spot homogenizing, makes energy be uniformly distributed.
Specifically, the first diffusion part 31 can be diffusion sheet material, and its surface can be coated with diffuser, can from than
As clouded glass or binary devices, diffuse-reflectance can be produced to light, destroy the directivity of laser.Can also be on diffusion sheet surface
Processing micro structure, plays same diffuse-reflectance effect.
Compared to static diffusion chip part, the diffusion chip part of motion is except increasing the eliminating coherence to laser beam
Effect, to laser beam in other words hot spot homogenize degree also more, as shown in Figure 3 a and Figure 3 b shows, for respectively pass through static
Form the shape matching of hot spot after the diffusion chip part of diffusion chip part and motion.Because the Energy distribution of laser is not uniform
, when the diffusion chip part of motion, with rotation, the position of spot center also can shift, thus forming multiple light
The effect of speckle superposition, and then the area of the hot spot ultimately forming is bigger, thus homogenizing degree also more preferably to laser facula.
Preferably due to be in gaussian shaped profile in view of laser, as shown in Figure 8.Therefore in order to improve to laser
Eliminating coherence and homogenize efficiency, the angle of divergence of the diffuser on the first diffusion part surface along described first diffusion part radially to
Outer is in be gradually reduced rule distribution, as shown in Figure 4.Diffuser the closer to proliferation part central area dissipates to laser beam
Angle is bigger, radially outward, and the diffuser further away from proliferation part zone line is less to the angle of divergence of laser beam.
Because image is made up of red-green-blue, in embodiments of the present invention laser can provide blue and
Red two kinds of primary colours are in addition it is also necessary to Wavelength converter is producing the green of one of three primary colours.Fluorescent wheel is conventional wavelength convert
Device, has rotating shaft, can hard to bear motor driving be rotated, as shown in figure 5, fluorescent wheel 4 includes transmissive portions 42 and reflecting part 41,
Wherein transmissive portions 42 are used for transmission excitation light, using the principle of the light of the short light excitation wavelength length of wavelength, from blue laser are
Excitation light.Reflecting part 41 surface-coated has green emitting phosphor.When fluorescent wheel 4 rotates, transmissive portions 42 and reflecting part 41, Jiu Huijiao
For the position being in excitation light source incidence.Thus when the blue laser through beam shaping incides fluorescence wheel surface, can
Enough transmit a part of laser and sent fluorescence moreover it is possible to excite by a part of laser.When fluorescent wheel 4 rotates reflecting part 41 position
When, blue laser irradiation green light fluorescent powder sends green fluorescence and the surface through fluorescent wheel 4 reflects away and reaches closing light part 5.
When fluorescent wheel turns to transmissive portions 42 position, transmissive portions can be clear glass, and blue laser will pass through transmissive portions 42, then
It is back to optics 5 from the back side of fluorescent wheel 4 through blue laser loop, blue laser loop is generally by relay lenss and reflection
Mirror is constituted.
Preferably, the front/back in fluorescent wheel 4 can also arrange collimation lens set, for reduce be transmitted laser or
The angle of flare of the fluorescent light being reflected, strengthens the convergence degree of light beam.
And it is directly incident on optics 5 after the red laser of beam shaping is then through the first diffusion sheet, in this reality
Apply in example, optics 5 can be selected for a piece of x closing light mirror.
Wherein, x closing light mirror is made up of the two panels eyeglass of one-tenth arranged in a crossed manner " x " type, and the saturating b of anti-a is realized by plated film in its surface,
Or the color selecting of the saturating a of anti-b passes through effect.For example, counter be popular in green eyeglass, or anti-green red, saturating indigo plant eyeglass, by closing in x
Rational coating is carried out on light eyeglass, and allows light avoid the not high area of center of lens transmitance in light path design as far as possible
Domain is it is possible to realize high reflectance and the high permeability of light.
In embodiments of the present invention, x closing light mirror 5 by a piece of anti-indigo plant thoroughly red, reveal the green eyeglass and a piece of counter be popular in indigo plant, reveal the green mirror
Piece forms, and the wherein anti-indigo plant that is popular in reveals the green eyeglass, can be reflected red laser, and blue laser is carried out transmission, transmission
Rear blue laser again by another anti-indigo plant be thoroughly popular in green lens reflecting to fluorescent wheel, eventually pass through a series of light path convertings and return again
To x closing light mirror 5, and green lens reflecting is thoroughly popular in by the anti-indigo plant in x closing light mirror 5 goes out.And the green fluorescence being excited is then by fluorescence
Wheel reflexes to x closing light mirror 5, and through x closing light mirror 5 counter be popular in indigo plant reveal the green eyeglass and anti-indigo plant be thoroughly popular in green eyeglass and all transmit
Go, red laser then first by counter be popular in indigo plant, the lens reflecting that reveals the green reaches that anti-indigo plant is thoroughly red, the lens transmission that reveals the green is gone out.Three kinds of colors
Propagation path in x closing light mirror for the light as shown in Fig. 2 closing light light path part.Finally, red laser, blue laser and green are glimmering
Light all forms mixed white light outgoing in the same direction through x closing light mirror 5 closing light.
In order to significantly more efficient, dissipation speckle is carried out to laser, after closing light, the mixed light of laser and fluorescence also will be through
Cross the second diffusion part 32 of dissipation speckle system 3, the second diffusion part 32 can be rotated by motor is controlled.Specifically, second
Diffusion part 32 can be color wheel structure, as shown in fig. 6, this colour wheel structure includes diffusion region 321 and non-diffusing area 322, diffusion
Area 321 is used for through blue laser and red laser, and non-diffusing area 322 is used for passing through green fluorescence.Diffusion region 321 and non-diffuse
Area 322 is spliced to form this colour wheel wheel face.
Wherein, diffusion region 321 can be selected for diffusion sheet material and makes, and its surface can also be coated with diffuser or setting is micro-
Structure.For being able to blue laser and red laser are diffused, diffusion region 321 is divided into blue laser diffusion region 321b again
With red laser diffusion region 321r, it is used for the timing ground when the second diffusion part rotates as shown in Figure 6 and passes through blue laser successively
And red laser.
Non-diffusing area 322 can be green color filter or transparent material, such as clear glass, for glimmering through green
Light, fluorescence is imported optical wand 6 and is homogenized.When non-diffusing area 322 is green color filter, the second diffusion part just serves colour filter
The effect of output, improves the color purity of green fluorescence.
Redness required by consideration system white balance and blue proportioning, blue laser diffusion region 321b and red laser expand
Center of circle angle is typically different in other words for the shared sectorial area in colour wheel structure of scattered area 321r, thus on this two diffusion regions
The coated area of diffuser is general also different.Such as in the present embodiment, blue, red and green three's central angle accounting is respectively
For 15%, 25%, 60%, specifically blue laser diffusion region 321b accounts for 54 degree of central angle, and red laser diffusion region 321r accounts for central angle
90 degree, non-diffusing area 322 accounts for 216 degree of central angle.Red laser diffusion region in above-mentioned second diffusion part, blue laser diffusion region and
The colour wheel center of circle angle distribution in non-diffusing area is only for example, and the proportioning of r, g, b color is relevant with the white balance required by system,
This is not limited to above-mentioned numerical range.White balance is that in description display device, the mixing of red, green, blue three primary colours is white smart after generating
One index of exactness, white balance can be looked for temperature, and the factor such as ambient light affects, and different white balances can assume different figures
As tone.And, in the above-described embodiments, if system speckle phenomena is serious, need to reduce the angle shared by portion of non-diffusing area
Degree, and increases the angle shared by diffusion region, using wide-angle diffusion region to weakening speckle phenomena.
Although the coherence of blue laser and red laser is closer to, because human eye is to red laser and blueness
The sensitivity of the speckle that laser is formed is different, and practical situation is that the speckle sensitivity that human eye is formed to red laser is higher,
Therefore the dissipation speckle for red laser will more be focused on.For red laser diffusion region 312r, many height diffusions can be included
Area, many sub- diffusion regions are set to difference to the dispersion angle of red laser, can be to be located at mesozone in many sub- diffusion regions
The sub- diffusion region in domain is more than positioned at the sub- diffusion region of two side areas the angle of divergence to red laser to the dispersion angle of red laser
The reason degree, and shared area is also greater than the area of the sub- diffusion region of two side areas, so setting, allows for the energy of laser
Amount is distributed as Gaussian, and as schematically shown in Figure 8, the energy of laser beam is more concentrated in centre, is therefore located centre position
The angle of divergence of diffusion region needs more greatly, and the bigger ability of area ratio is effectively carried out to the laser beam of energy more concentration
Dissipate.
For example shown in Fig. 7, red laser diffusion part is the sub- diffusion part of 3 red lasers, and ra, rb, rc, wherein rb are fan-shaped
Central angle is 45 degree, and ra is 20 degree, and rc is 25 degree, and at rb, the angle of divergence of diffuse reflector could be arranged to 5 degree ~ 5.5 degree, ra
The angle of divergence of diffuse reflector could be arranged to 2 degree ~ 2.5 degree everywhere, and at rc, the angle of divergence of diffuse reflector could be arranged to 2.5 degree ~ 3
Degree, is arranged such, and the gradual arrangement of each sub- diffusion part of red laser diffusion part can be directed to the feature of gaussian laser type light beam
Effectively carry out eliminating coherence.
The work process that in the present embodiment, laser carries out dissipation speckle is: lights sequential according to laser instrument, when a sapphirine swashs
During light device, blue laser, through beam shaping, through the first diffusion part 31, is realized preliminary eliminating coherence and is homogenized, through x closing light
Mirror 5 reflexes to fluorescent wheel 4, when fluorescent wheel 4 goes to transmissive portions 42 position, and from fluorescent wheel transmissive portions 42 transmission, with after through in
The loop optical path that continues conversion reaches x closing light mirror 5 and reflects output again, and now, the second diffusion part 32 turns to blue laser diffusion region
321b, thus blue laser forms blue light through the diffusion sheet diffusion outgoing of motion.When fluorescent wheel 4 goes to reflecting part 41, blue
Color laser is irradiated to the green emitting phosphor of reflecting part 41 surface perimeter part, and the green fluorescence sending is reflected and through x by fluorescent wheel
Closing light mirror 5 transmission exports, and now, the second diffusion part 32 turns to non-diffusing area 322 position, such as green color filter, thus
Green fluorescence is through the green color filter of the second diffusion part rotating, filtered formation green glow.
In the same manner, when red laser is lighted, red laser is through light-beam forming unit and through through the first diffusion part 31, realizing
Preliminary eliminating coherence, reaches and is reflected by x closing light mirror, now, the second diffusion part 32 goes to red laser diffusion region 321r position,
Rotation with red laser diffusion region 321r is passed sequentially through ra, rb, rc by red laser, through spreading again, thus red
The diffusion outgoing of laser light red laser diffusion region 321r forms HONGGUANG.
To sum up, provide in two-color laser light source technology scheme in the present embodiment, the blueness that blue and red laser sends
Laser and red laser first pass around the first diffusion part 31 of motion, can be diffusion sheet material, no matter to blue laser beams
Or laser beam all can reduce the coherence of laser beam by increasing the random phase spatially of laser beam.When
After blue laser, red laser and fluorescence closing light again when the second diffusion part 32 of motion, can be diffusion sheet material, sequential
Property, transmissive at least for blue laser and red laser, is diffused again to the laser after closing light, produce further spatially with
Machine phase place, the proliferation part effect of two motions is overlapped mutually, and has carried out eliminating coherence to laser beam, thus swashing for projection
Radiant can form more independent speckle pattern on projection images, and the number of independent speckle pattern is more, using people
Eye integral action, the phenomenon of light and shade speckle weaker such that it is able to effectively weaken the speckle effect of laser, improve projection
As display quality.
And, the present embodiment is also directed to the human eye feature more sensitive to red laser speckle, will be red in the second diffusion part
Multiple sub- diffusion regions are divided in the diffusion of color laser, and dissipate in area with to red laser positioned at the sub- diffusion region of zone line
Angle aspect is all higher than the sub- diffusion region of two side areas such that it is able to be directed to the feature of laser beam Gauss distribution, increases further
The strong dissipation speckle effect to red laser.
Simultaneously as the first diffusion part 31 is controlled being moved, and it is arranged in beam shaping light path, can be to laser light
Bundle diffusion simultaneously works as homogenizing the effect of light spot energy, thus pass through minimizing energy during optical glass beneficial to laser beam excessively collecting
In in other words energy density high and cause opticses heating too fast or deposition dust situation occurs, simultaneously facilitate after homogenizing
Blue laser beams fluorescent wheel is excited, improve fluorescence launching efficiency, it is to avoid light spot energy is uneven, energy concentrate
Temperature course and cause the calcination of fluorescence wheel surface.
And, in the embodiment of the present invention, the second diffusion part is wheel construction of the same colour, including diffusion region and non-diffusing area, two
Divide by being spliced to form wheel face, diffusion region and non-diffusing area can be sequentially output blue light with timing with the rotation of colour wheel, red
Light and green glow, can export three primary colours in timing ground, thus having concurrently to LASER Light Source dissipation speckle and exporting three primary colours for system
Effect, it is possible to reduce the use of colour filter wheel component, improve the utilization rate of opticses in laser source system, beneficial to simplification
Light-source system framework.
And, the embodiment of the present invention, the dissipation speckle for blue laser and red laser shares by the first diffusion part and the
The dissipation speckle system of two diffusion part compositions, non-is not to carry out dissipation speckle light path design respectively for every road laser, reduces light source
The complexity of light path, improves dissipation speckle efficiency.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to including excellent
Select embodiment and fall into being had altered and changing of the scope of the invention.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprise these changes and modification.
Claims (6)
1. a kind of two-color laser light source, including blue laser and red laser, sends blue laser and red laser respectively；
Fluorescent wheel, its surface-coated has green emitting phosphor, and described green emitting phosphor is excited by described blue laser and sends green fluorescence, its
It is characterised by,
Also include dissipation speckle system, described dissipation speckle system includes:
First diffusion part, the controlled light beam being rotated, being arranged at described blue laser and red laser of described first diffusion part
In shaping light path, for spreading described blue laser and red laser；
And second diffusion part, described second diffusion part is controlled to be rotated, and is arranged at described blue laser, red laser and green
Before fluorescence incidence optical wand, for timing transmissive at least for described blue laser and red laser and to form blue light, HONGGUANG defeated
Go out;
Wherein, the second diffusion part includes diffusion region and non-diffusing area, and described diffusion region is used for through described blue laser and redness
Laser, described non-diffusing area is used for through described green fluorescence；
The diffusion region of described second diffusion part includes blue laser diffusion region and red laser diffusion region,
Described red laser diffusion region includes many peripherally disposed sub- diffusion regions,
Positioned at the sub- diffusion region of zone line, the dispersion angle of described red laser is more than in the plurality of sub- diffusion region and is located at
The dispersion angle to described red laser for the sub- diffusion region of two side areas.
2. LASER Light Source according to claim 1 it is characterised in that described first diffusion part be diffusion sheet material, its table
Face is coated with diffuser.
3. LASER Light Source according to claim 2 is it is characterised in that the angle of divergence edge of the diffuser of described first diffusion part
Described first diffusion part is in outwards radially to be gradually reduced rule distribution.
4. it is characterised in that described diffusion region is diffusion sheet material, its surface applies LASER Light Source according to claim 1
It is covered with diffuser.
5. LASER Light Source according to claim 1 is it is characterised in that described non-diffusing area is green color filter or transparent material
Matter, for entering optical wand through described green fluorescence.
6. LASER Light Source according to claim 1 is it is characterised in that be located at zone line in the plurality of sub- diffusion part
The area of sub- diffusion part is more than the area of the sub- diffusion part positioned at two side areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510509918.3A CN105093794B (en) | 2015-06-03 | 2015-08-19 | Double-color laser light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298324 | 2015-06-03 | ||
| CN2015102983242 | 2015-06-03 | ||
| CN201510509918.3A CN105093794B (en) | 2015-06-03 | 2015-08-19 | Double-color laser light source |
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| Publication Number | Publication Date |
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| CN105093794A CN105093794A (en) | 2015-11-25 |
| CN105093794B true CN105093794B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510509918.3A Active CN105093794B (en) | 2015-06-03 | 2015-08-19 | Double-color laser light source |
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| Country | Link |
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| CN (1) | CN105093794B (en) |
| WO (1) | WO2016192222A1 (en) |
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| CN105093794B (en) * | 2015-06-03 | 2017-02-01 | 海信集团有限公司 | Double-color laser light source |
| CN105093795B (en) * | 2015-06-03 | 2017-06-16 | 海信集团有限公司 | A kind of two-color laser light source |
| CN108255006B (en) * | 2015-12-18 | 2020-03-24 | 海信集团有限公司 | Diffusion sheet |
| CN105573031B (en) * | 2015-12-18 | 2018-09-21 | 海信集团有限公司 | A kind of light source and laser projection device |
| CN105573037B (en) * | 2015-12-31 | 2017-09-01 | 海信集团有限公司 | A kind of LASER Light Source and laser projection device |
| CN105676577A (en) * | 2016-03-07 | 2016-06-15 | 海信集团有限公司 | Light source device and laser projection display equipment |
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| CN112118430B (en) * | 2019-06-20 | 2022-03-25 | 青岛海信激光显示股份有限公司 | Laser projection device |
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| CN112578619A (en) * | 2020-11-23 | 2021-03-30 | 山西傲维光视光电科技有限公司 | Low-speckle high-uniformity laser light source optical path structure |
| CN113093398B (en) * | 2021-04-09 | 2023-01-06 | 青岛海信激光显示股份有限公司 | Speckle eliminating assembly, light source device and control method of light source device |
| CN113253557B (en) * | 2021-04-30 | 2022-08-02 | 电子科技大学 | Projector system based on Fresnel lens |
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Also Published As
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| CN105093794A (en) | 2015-11-25 |
| WO2016192222A1 (en) | 2016-12-08 |
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