CN109581796A - A kind of fluorescent wheel and laser light source - Google Patents
A kind of fluorescent wheel and laser light source Download PDFInfo
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- CN109581796A CN109581796A CN201811626479.4A CN201811626479A CN109581796A CN 109581796 A CN109581796 A CN 109581796A CN 201811626479 A CN201811626479 A CN 201811626479A CN 109581796 A CN109581796 A CN 109581796A
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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
-
- 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
-
- 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
- G03B21/208—Homogenising, shaping of the illumination light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a kind of fluorescent wheel and laser light source, including fluorescent powder and inorganic material, fluorescent powder and inorganic material are mixed to form disc wafer；Substrate includes phosphor region, and phosphor region includes fluorescence coating, and the plated film on fluorescence coating；Plated film is used for transmission laser excitation light and reflected fluorescent light, can be improved the light extraction efficiency of fluorescence.
Description
The application is in entitled " a kind of fluorescent wheel and two-color laser light source " proposed on October 14th, 2015
The divisional application of state's application for a patent for invention 201510657074.7.
Technical field
The present invention relates to laser lighting display field more particularly to a kind of fluorescent wheels and laser light source.
Background technique
Laser is a kind of high brightness, high directivity, issues the light source of monochromatic coherent light beam, due to the plurality of advantages of laser,
Gradually it is used as light source applications in projection display technique field in recent years.But the speckle issue of pure laser light source is serious and cost
Height, the laser light source mixed at present with fluorescence and laser is using relatively broad.
Wherein, fluorescence is generated in a manner of LASER Excited Fluorescence powder by coating fluorescent powder on Wavelength converter
's.For example, generate three primary colours light with blue laser excitation green and red fluorescence powder, wherein green emitting phosphor and red fluorescence
Wheel is on the Wavelength converter coated in rotation, and usually fluorescence wheel construction, is sequentially output three bases according to timing by rotating
Coloured light.Or red blue two-color laser light source, it excites the green emitting phosphor on fluorescent wheel to generate green fluorescence and forms three primary colours light.
Fluorescent wheel can be divided into transmission-type and two kinds of reflection-type at present.
In transmission-type fluorescent wheel, the substrate at coating fluorescent powder position is transparent material, excites the fluorescence of generation can be with 360
Comprehensive diverging is spent, wherein the segment beam dissipated outward can be reflected by being plated in the reflectance coating of outer layer, and is passed through glimmering
Halo transparent substrate forms transmission, projects with the consistent direction of laser pumping light incident direction, outside fluorescent powder wheel as shown in Figure 1
Circumferential section schematic diagram, 3b are phosphor powder layer, are formed usually using colloid mixed fluorescent powder, pass through the layer glass of front and rear sides
3a is gripped, the inner surface plated film 3c that front glass is in contact with phosphor powder layer, for transmission laser and reflected fluorescent light, rear side
Glass is used to transmit through reflected fluorescence and be directly transmitted to the fluorescence of glass surface.
In reflection-type fluorescent wheel, as shown in Fig. 2, fluorescent powder is generally arranged at the excircle of aluminum substrate, laser excitation is glimmering
After light, due to the diverging direction of fluorescence be it is multidirectional, a part of fluorescence can by aluminum substrate mirror-reflection and a part of fluorescence
It is projected with directly being reflected with the direction contrary with laser light incident, the laser after transmission is needed due to contrary with fluorescence
Circuit design by optical axis conversion, finally carries out light combination with fluorescence.
In above two fluorescent wheel type, it is provided with laser transmission area, it is successively defeated according to the rotation timing of fluorescent wheel
Laser and fluorescence out, the laser after transmission output also need to carry out dissipation spot by dissipation spot optical path could to make as light source
With.
And the application along with red blue two-color laser, red laser improve laser light source instead of red fluorescence
Overall brightness, but the increase of laser type has been further aggravated speckle phenomena, needed to increase in optical design special
Dissipation spot device, such as optical fiber, random phase plate and accessory carry out dissipation spot light path design, to meet projection lighting light source
Quality, but which increases the volume of optics framework and complexity, and then are unfavorable for the miniaturization of laser equipment.
Summary of the invention
The present invention provides a kind of fluorescent wheel and laser light sources, can be improved.
The present invention is achieved by the following technical solutions:
A kind of fluorescent wheel, which is characterized in that fluorescent wheel includes fluorescent powder and inorganic material, and fluorescent powder and inorganic material are mixed to form
Disc wafer；Substrate includes phosphor region, and phosphor region includes fluorescence coating, and the plated film on fluorescence coating；Plated film is used for
Transmission laser excitation light and reflected fluorescent light.
Further, fluorescent wheel further includes non-fluorescence area, and non-fluorescence area is used to spread laser.
Further, non-fluorescence area is the arc-shaped or sector notch formed on substrate, and indentation, there is provided with diffuser plate.
Further, inorganic material includes ceramics, quartz or glass.
Further, fluorescence coating is by fluorescent powder and the mixing cured formation of inorganic material.
Further, diffuser plate is to laser light scattering or diffraction.
Further, substrate is transparent substrate.
And the present invention also provides a kind of laser light source, including laser, for issuing laser and above-mentioned glimmering
Halo, and, further include be set to the positive condenser lens of fluorescent wheel, and, it is positive to be incident to fluorescent wheel in laser beam
Diffusion sheet is further fixedly arranged in optical path.
Further, the fluorescent wheel back side is provided with the first collimation lens set, carries out for the light beam to transmission fluorescent wheel quasi-
Directly.
Further, laser light source further includes light collecting device, is additionally provided between the fluorescent wheel back side and light collecting device poly-
Focus lens, for focusing the laser and fluorescence that are emitted from the fluorescent wheel back side.
Technical solution of the present invention, at least have the advantages that following advantageous effects or:
The fluorescent wheel that technical solution of the present invention provides, by fluorescent powder and inorganic material be mixed to form it is discoid it is basic itself, thus
Main structure of the substrate as fluorescent wheel itself can also be excited to generate fluorescence, and compared to traditional transmission-type fluorescent wheel, needing will be glimmering
Light bisque is adhered to the multilayered structure on substrate by colloid, and the fluorescence wheel construction that the technical program provides simplifies, light extraction efficiency
It is high.
And the laser light source that technical solution of the present invention provides, using the fluorescent wheel of above-mentioned technical proposal, light extraction efficiency
It is high.
Detailed description of the invention
Fig. 1 is that fluorescent wheel transmits fluorescence light path schematic diagram in the prior art；
Fig. 2 is fluorescent wheel reflected fluorescent light light path schematic diagram in the prior art；
Fig. 3 is the fluorescent wheel plane distribution schematic diagram that the embodiment of the present invention 1 provides；
Fig. 4 is the another fluorescent wheel plane distribution schematic diagram that the embodiment of the present invention 1 provides；
Fig. 5 is another fluorescent wheel plane distribution schematic diagram that the embodiment of the present invention 1 provides；
Fig. 6 is another fluorescent wheel plane distribution schematic diagram that the embodiment of the present invention 1 provides；
Fig. 7 is the diagrammatic cross-section for the fluorescence wheel construction that the embodiment of the present invention 1 provides；
The partial enlargement diagram of Fig. 7 in Fig. 8 embodiment of the present invention 1；
Fig. 9 is 2 laser light source optics configuration diagram of the embodiment of the present invention；
Figure 10 is 2 two-color laser light-source structure schematic diagram of the embodiment of the present invention；
Figure 11 is 2 light source working timing diagram of the embodiment of the present invention；
Figure 12 is 3 laser light source structural schematic diagram of the embodiment of the present invention；
Figure 13 is laser beam Gaussian Profile schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
The embodiment of the present invention 1 provides a kind of fluorescent wheel, is driven and is rotated by motor, as shown in figure 3, the fluorescent wheel 3, is in disk
Shape, including phosphor region 31, non-fluorescence area, wherein non-fluorescence area includes central motor shaft region and transmission area 32.Wherein, as schemed
Shown in 7, phosphor region 31 includes green fluorescent layer 311, and the film plating layer 312 on green fluorescent layer 311.Wherein, glimmering
The excitation that the green fluorescent layer 311 in light area 31 is used to receive incident laser pumping light generates fluorescence, and transmission area 32 is not provided with glimmering
Light powder provides independent channel for the transmission for laser, so that in laser light source in the non-fluorescence excitation that fluorescent wheel rotates
Between section transmitted by the position, which includes laser pumping light source, also may include the non-actuated light source of laser.Plated film 312
It is a dichroic film in outer surface, that is, laser incidence side of fluorescence coating 311, for the excitation of higher transmissivity transmission laser
Light, and reflect by the fluorescence of the incident film layer of laser excitation.LASER Excited Fluorescence shown in Figure 8, and reflected fluorescent light
Light path schematic diagram.
As shown in figure 3, the transmission area 32 of fluorescent wheel 3 is diffuser plate, it should be noted that transmission area is that diffuser plate refers to
It penetrates area to be made of diffuser plate material, or frosted glass, the transmission area of the diffuser plate material is for transmiting and diffusing through this
The first laser and second laser of diffusion board structure, wherein first laser is the non-actuated light source of laser, and second laser swashs for laser
Encourage light source.
Diffuser surface is coated with diffuser or carries out blasting treatment or be machined with micro-structure, it is therefore an objective to increase to light transmission light
The diffusing reflection degree of beam increases the angle of divergence of light beam, realizes diffusion.Specifically, can be arranged on fluorescent wheel excircle
Diffuser plate component is embedded at the gap position by arc notch.In Fig. 3, notch is first opened up at 32 positions, it then will diffusion
Hardened structure inlay card is spliced to form complete circumferential shapes with fluorescence coating 31 in entering.Or shadow region as described in Figure 5 is (different
The sum of two pieces of shadow regions), be that sector notch is set on fluorescent wheel, then diffusion board structure is arranged to same size insertion
Herein, the diffusion region of fan-shaped region is formed.The shape and installation site for only illustrating diffuser plate herein, do not do specific limit
It is fixed.
In compared with the prior art, transmission area uses hollow out or glass material, and hollow out setting is easy to revolve in fluorescent wheel
Shear force is generated to air-flow when turning and is made a noise and glass material can only realize the transmission of laser.In embodiments of the present invention,
Transmission area uses diffuser plate material, on the one hand the transmission of blue laser and red laser may be implemented in the effect of the diffuser plate,
Project laser across fluorescent wheel, simultaneously because a part of diffuser plate as fluorescent wheel is done according to the work characteristics of fluorescent wheel
Periodic rotary motion, so that it is equivalent to the diffusion sheet of a piece of movement, the laser that the diffusion sheet of movement can be relevant for height
Light beam generates more random phase spatially, to destroy the coherence of laser beam, mitigates laser and is formed as light source
Speckle phenomena when projected image.
Since human eye is different to the laser-formed speckle image sensitivity of different colours, for example human eye dissipates red laser
The sensitivity of spot is greater than for blue laser, therefore to reach the consistent display effect of the two, it usually needs increasing pair
The dissipation spot degree of red laser.
In citing of the embodiment of the present invention, first laser can be red laser, and second laser can be blue laser, blue
Color laser includes green emitting phosphor in fluorescence coating, is excited that green fluorescence can be issued as laser pumping light source.In order to increase
By force to the diffusion of red laser, it is preferable that in the embodiment of the present invention, diffuser plate is divided into two diffusion regions, first swashs
Light diffusion region and second laser diffusion region.Wherein, first laser diffusion region, that is, red laser diffusion region dispersion angle is greater than the
Dual-laser diffusion region, that is, blue laser diffusion region dispersion angle.Template and photoetching can be passed through by semiconductor lithography process
Step formed variable grain degree, arrangement, size micro-structure realize to the different dispersion angles of laser.
Diffuser plate can be scattering to the diffusion of laser, be also possible to diffraction, not specific herein to limit.
Specifically, as shown in figure 4, the diffuser plate of transmission area 32 is provided with blue laser diffusion region 322 and red laser expands
Area 321, hereinafter referred to as blue light diffusion region and feux rouges diffusion region are dissipated, transmission diffusion blue laser and red laser, tool are respectively used to
Body, diffuser is coated on blue light diffusion region 322 and feux rouges diffusion region 321, for example be frosted glass or binary devices, mesh
Be that the stronger laser beam of directional carries out diffusing reflection, increase the angle of divergence of laser beam, broken beam space quadrature
Stability, thus destroy generate interference condition.Wherein, feux rouges diffusion region expands the dispersion angle of laser beam greater than blue light
Dissipate area, it is therefore an objective to increase the degree of divergence to red laser, human eye is made to observe that the drop shadow effect of feux rouges and blue light is suitable.
Alternatively, 322 be blue light diffusion region, and feux rouges diffusion region is to the hair through light as shown in figure 5,321 be feux rouges diffusion region
The degree of dissipating is greater than blue light diffusion region.
And further, it is contemplated that the Energy distribution of laser is Gaussian, as shown in figure 13, near 0 degree of optical axis
Light energy more concentrate, incident angle is identical, and phase or phase difference are stablized, and interference is easy to produce, to cause light source shape
It is serious at speckle phenomena when projected image.Therefore, in order to improve the dissipation spot effect to red laser, for feux rouges diffusion region
321, it can be set including multiple sub- diffusion regions, multiple sub- diffusion regions are set as different to the dispersion angle of red laser, can be with
It is that sub- diffusion region in multiple sub- diffusion regions positioned at intermediate region is greater than the dispersion angle of red laser and is located at two side areas
Sub- diffusion region is to the dispersion angle of red laser, and shared area is also greater than the area of the sub- diffusion region of two side areas, in this way
The region that laser beam intermediate energy can be more concentrated is set, with the expansion of the biggish angle of divergence and the type of larger area
Scattered area is diffused, and improves the dissipation spot degree to red laser light beam.
As shown in fig. 6, feux rouges diffusion region is divided into 3 sub- diffusion regions of red laser, 321a, 321b, 321c, shared by three
Angle ratio in, angle shared by 321b is more than or equal to the sum of 321a and 321c, and the angle ratio of 321a and 321c are suitable.With
Red diffusion region account for central angle be 108 degree for, 321b accounts for 54 degree, and 321a and 321c are respectively 27 degree, only illustrates herein qualitative
Illustrate the different diffusion angle distribution in three sub- diffusion regions, does not limit specific value.And the part 321b is to the angle of divergence of light
Spend the dispersion angle also greater than the part 321a and 321c to light.For example, the angle of divergence of the part 321b can be set to 5 degree ~ 5.5
It spends, the angle of divergence at 321a can be set to 2 degree ~ 2.5 degree, and the angle of divergence of 321c can be set to 2.5 degree ~ 3 degree, in this way, red
The gradual arrangement in each sub- diffusion region in color laser diffusion region can effectively carry out the phase that disappears for the characteristics of gaussian laser type light beam
It is dry, most of light beam near 0 degree of optical axis is broken up, degree of coherence is reduced.
And in embodiments of the present invention, fluorescent wheel 3 be transmission-type fluorescent wheel, but with transmission-type fluorescence in the prior art
Wheel construction is different, as shown in Figure 1, transmission-type fluorescent wheel in the prior art is by gripping fluorescence coating reality among layer glass plate
It is existing, and dichroic film is plated in the inside of front glass, but since the coefficient of heat conduction of glass is low, heat dissipation is slow, along with fluorescence
The amount of heat that excitation generates, which is easy to build up, increases phosphor powder layer temperature sharply, and entire fluorescent wheel temperature also increases, and makes
At the reduction of fluorescence conversion efficiency, simultaneously because colloid is organic material, there is certain penetrance, and have to luminous energy certain
The absorption of degree, so when either incident laser or fluorescence through reflection pass through colloid layer (the i.e. above-mentioned phosphor powder layer)
The loss that a part of luminous energy will be generated, to reduce the launching efficiency of fluorescence, while can also generate heat during absorbing luminous energy.
And in the embodiment of the present invention, fluorescent wheel substrate is transparent substrate, is made of inorganic material, inorganic material can be selected
Ceramics, quartz or glass.And fluorescence coating can be mixed and be formed by curing by fluorescent powder and inorganic material, for example pass through agglomerant
Skill by fluorescent powder curing to ceramics, quartz or glass, rather than passes through colloid and bonds.By select inorganic material with it is glimmering
Light powder is mixed to form substrate shape, and the radiating efficiency of inorganic material is relatively high, it is not easy to heat accumulation is generated, to reduce heat
The influence to fluorescence conversion efficiency is measured, and inorganic material passes through a base to luminous energy almost without absorption and fluorescence
The reflection of plate thickness is projected from the fluorescent wheel back side along with the consistent direction in laser light incident direction, will not be existed to be absorbed and be caused
Light loss, so that the light extraction efficiency of fluorescence is also improved.
As shown in fig. 7,311 be fluorescence coating, fluorescence coating is the mixed layer of transparent inorganic material substrate and fluorescent powder, and 312 are
Dichroic film film plating layer on the outside of fluorescence coating, blue laser first pass through dichroic film transmission and are incident to fluorescence coating, then swash
Hair is converted to fluorescence, and a part of fluorescence is (saturating directly through 311 fluorescence coatings by the reflection and a part of fluorescence of dichroic film 312
Bright substrate) it is projected from the fluorescent wheel back side.
To sum up, the fluorescent wheel that technical solution of the present invention provides, is transmissive to fluorescence and laser, by setting transmission area to
Diffuser plate, the work characteristics rotated using fluorescent wheel itself, the diffuser plate of transmission area just form the diffusion sheet of a piece of movement, thus
It can be diffused while being transmitted to laser and play the role of dissipation spot, eliminate individual dissipation spot component.Together
When, the combining of first laser, second laser and fluorescence in the same direction is exported, with the dissipation to first laser, second laser
Spot is completed by a fluorescence wheel component, is improved the light processing efficiency of fluorescent wheel, is made fluorescent wheel multifunction.
Embodiment 2
The embodiment of the present invention 2 provides a kind of two-color laser light source, as shown in figure 9, including laser light source unit 1, including blue swashs
Light device and red laser issue blue laser and red laser respectively；Fluorescent wheel 3 and the first focused light passages system 2 are used
It is focused in by the biggish laser facula of blue laser and red laser sending, is contracted to the small light spot being sized
It is incident to fluorescent wheel 3.
Wherein, fluorescent wheel 3 is fluorescent wheel described in embodiment 1, and fluorescent wheel 3 includes green emitting phosphor area, because blue
Laser wave length, according to energy jump and wavelength convert principle, the blue laser for selecting wavelength shorter excites green as exciting light
Color fluorescent powder generates green fluorescence；Wherein, the substrate in green emitting phosphor area is transparent substrate on fluorescent wheel 3, in the transparent substrate
Blue laser incident side plated film, which has wavelength selection effect, for high thoroughly blue anti-green coating, for transmitting blue laser
The green fluorescence generated is excited with reflection；And the also transmission through transparent substrate of the green fluorescence after coated reflection and along with
It projects in the consistent direction of the incident direction of blue laser.And fluorescent wheel 3 includes transmission area, wherein transmission area is a diffuser plate,
It is made of diffuser plate material, for transmiting and diffusing through the red laser and blue laser of the diffusion board structure.And according to right
The difference of the dispersion angle of light is provided with feux rouges diffusion region and blue light diffusion region on diffuser plate, and wherein feux rouges diffusion region is to light
Dispersion angle is greater than blue light diffusion region to the dispersion angle of light.It specifically still can be found in Fig. 4 and Fig. 5 and Fig. 6,321 feux rouges expand
Dissipate the setting signal of area and 322 blue light diffusion regions.It can be by coating the diffuser of different densities or processing not on diffuser plate
The setting of different dispersion angles is realized with the micro-structure of density or degree of convexity.
Red laser, blue laser and green fluorescence are after fluorescent wheel 3 is sequentially output, and also collimated focus enters optical wand,
Illumination is provided for ray machine.Specifically, red laser, blue laser and green fluorescence are after the outgoing of the fluorescent wheel back side also by collimation
Lens group is collimated.Directionality due to fluorescence compared to laser wants poor, has biggish dispersion angle, and laser is by poly-
Coke reaches fluorescent wheel, and according to light along the principle of straightline propagation, after being emitted, laser can be projected in the state of diverging, it is therefore desirable to
The light beam of diverging is collimated.
And since optical wand has certain incidence angle requirement, the light beam greater than optical wand incident angle will be unable to enter light
Stick, so that light loss is caused, so in order to improve the efficiency of light source incidence optical wand, it can be by poly- before light beam of light combination enters optical wand
Coke reduces the angle of light beam, so that luminous energy as much as possible enters optical wand guiding device, improves for subsequent opto-mechanical part high
The illumination of brightness.
Below in conjunction with Figure 10 example, the structure and the course of work of the two-color laser light source is described in detail.
As shown in Figure 10, laser light source unit 1 includes blue laser 11, red laser 12.The directionality of laser is preferable,
It is not the collimated light beam in absolute sense but there are still certain dispersion angle.The laser light issued at present by laser
Spot diameter is about in 60mm or so, since the excitation of fluorescence needs that beam area is smaller, laser facula of high-energy, and if light
Spot energy density then be easy to cause fluorescence burn greatly very much, so needing to carry out shaping, packet to the laser beam that laser issues
Shrink beam is included, homogenizing etc. can be only achieved glimmering light activated technical requirements after processing.In embodiments of the present invention, it is excited for fluorescence
Laser spot diameter control in 0.8mm or so, therefore, blue laser that blue laser 11 and red laser 12 issue and
Red laser needs the Shape correction reduced by hot spot.
In a kind of specific embodiment, using telescopic system, i.e., (the two is burnt for a piece of big convex lens and a piece of concavees lens
Point is overlapped) shrink beam shaping is carried out, then a piece of convex lens is placed before incident fluorescence wheel, the light beam after shrink beam is focused,
It forms lesser hot spot and is incident to fluorescence wheel surface.
And in a kind of specific implementation, as shown in Figure 10 of the embodiment of the present invention, the poly- of the first focused light passages system 2 is utilized
Big laser facula is become the small hot spot of high-energy by coke processing.Wherein, the first focused light passages system 2 includes that the first focusing is saturating
Microscope group 21 and the second condenser lens 22 are respectively arranged at blue laser wherein the first focus lens group is the first convex lens of two panels
On the emitting light path of device 11 and the red laser 12, due to carry out the to the biggish light beam or hot spot of laser emitting
The face type of focus processing, the first condenser lens is larger, so as to receive the light beam or hot spot of large area.By first
After condenser lens 21 focuses, a degree of convergence is had been carried out in blue laser or red laser light beam, if to reach glimmering
Light activated requirement then needs for fluorescent wheel to be arranged in one times of focal position of the first condenser lens, and this is unable to satisfy system
Therefore the requirement of volume design is additionally provided with the second condenser lens, can be a piece of second convex lens, close to 3 front of fluorescent wheel
Setting for secondary focusing blue laser and red laser light beam and is incident to the fluorescent wheel front, plays quickening laser light
The effect of beam focusing process.
And since red laser 12 and blue laser 11 in embodiments of the present invention are at vertical arrangement, need by
Two vertical optical paths of optical axis carry out light combination, fluorescent wheel are incident in one direction, so the first focused light passages system further includes
First light combination component, for example can be dichroscope, it is set in the optical path that blue laser and red laser focus, has thoroughly blue
Anti- red wavelength selection effect, for the red laser of vertical arrangement and blue laser to be carried out conjunction beam, outbound course is consistent
Laser beam.
It, can be successively incident according to timing is lighted after blue laser and red laser are focused to form small launching spot
Fluorescent wheel.In the embodiment of the present invention, two-color laser light source further includes control unit (not shown), for according to timing control
The green emitting phosphor area 31 and blue light diffusion region 322 and control point shiny red for lighting 11 incident fluorescence wheel 3 of blue laser swash
The incident feux rouges of light device 12 diffusion region 321.
In specific implementation, it is contemplated that display system white balance and light-source brightness requirement, in one cycle, feux rouges is blue
Light and green light are respectively provided with certain ignition period time.By taking display frequency is 120HZ as an example, a cycle is T=8.3ms, this
It is the time cycle of time and whole group laser light source sequential illumination that fluorescent wheel rotates a circle required.In T=8.3ms
Between in section, the lighting time of control unit control blue laser accounts for about the time of whole cycle 70%, lights in blue laser
This period in, wherein the time of 50%T is for exciting green fluorescence, and time of remaining 20%T is for transmit away, and controls
The lighting time of unit control red laser processed accounts for about the time of whole cycle 30%, accordingly, red diffusion region on fluorescent wheel
321, blue diffusion region 322, center of circle angle ratio shared by green fluorescence area 31 is about 30%, 20%, 50%, central angle angle value point
Wei not be 108 degree, 72 degree, 180 degree.Wherein, the ratio of green fluorescence is big, helps to improve integrated light source brightness.
As shown in figure 11, red laser, which is in, when blue laser is in illuminating state, in time period closes shape
State, when fluorescent wheel is rotated to green fluorescence area, blue laser excitated fluorescent powder generates fluorescence, then within the period of 50%T
Fluorescent wheel exports green fluorescence；When fluorescent wheel is rotated to blue light diffusion region, blue laser is transmitted through diffuser plate, then
The fluorescent wheel output blue laser within this 20%T period；When closing blue laser, when lighting red laser, fluorescence at this time
Wheel rotation is to feux rouges diffusion region, and similarly, red laser is transmitted through diffuser plate, and fluorescent wheel output is red within the 30%T period
Color laser, to realize output of the light along consistent direction of kind of color by a fluorescence wheel component, do not need again periphery into
The optical design of row light path converting and combining.
As previously mentioned, the blue laser, red laser and the green fluorescence that export through fluorescent wheel, need by collimating and focusing
The incident entering light stick of ability, the opto-mechanical part to connect with light source provide illumination.
As shown in Figure 10, blue laser, red laser and the green fluorescence successively projected, which first passes through, is set to the back of fluorescent wheel 3
First collimation lens set 41 in face, collimates these light beams with dispersion angle.Wherein, the first reflecting mirror 41 is flat
Face reflecting mirror exports final three primary colours light for converting the blue laser, red laser and the optical path direction of green fluorescence
It direction can be towards optical wand guiding device, when not needing light path converting, it is not necessary to be arranged, and be reflected through the first reflecting mirror 41
Tri-color beam afterwards reaches tertiary focusing lens 43, and for focusing blue laser for the last time before entering optical wand, red swashs
Light and green fluorescence；Optical wand is common guiding device or light collecting device, for receiving after tertiary focusing lens focus
Blue laser, red laser and green fluorescence light beam, and export for illuminating.In embodiments of the present invention, it is greater than and deviates
The light beam of 25 degree of dispersion angles of optical axis cannot be introduced into optical wand, and the light beam of dispersion angle can fully enter light within the scope of 25 degree
Stick, determines the brightness of lighting source into the light quantity of optical wand, therefore in order to allow light beam is as much as possible to enter optical wand, need by
The light beam of the various colors exported from fluorescent wheel is focused again to reduce and meet the incident angle angle of optical wand, provides height
The lighting source of brightness.
To sum up, two-color laser light source provided in an embodiment of the present invention, including blue laser and red laser are sent out respectively
Blue laser and red laser out further include fluorescent wheel, by the way that diffuser plate is arranged in transmission area, since diffuser plate is as fluorescent wheel
A part, with fluorescent wheel rotation and periodic motion, the diffusion board structure are equivalent to the diffusion sheet of a piece of movement, to only pass through
One fluorescence wheel component, which can be realized to be diffused it while transmiting two-color laser, plays the role of dissipation spot, saves
Individual dissipation spot component, such as optical fiber are removed, the design of random phase plate and driving circuit etc. simplifies in optics framework
The design of dissipation spot optical path, and the illumination of high quality can be provided for ray machine.
Since the fluorescent wheel transmits fluorescence, rather than reflection-type fluorescent wheel as shown in Figure 2 carries out anti-fluorescence
It penetrates, and multiple optical mirror slips composition laser circuits is set to make laser and to be reflected back through fluorescent wheel glimmering in fluorescent wheel side
Light carries out light combination, therefore can simplify the combining light path design of fluorescent wheel periphery.
The embodiment of the present invention does not need on the basis of monochromatic laser light source individually when being applied to two-color laser light source
Light combination circuit and dissipation spot optical path are set for red laser, but red and blue laser is transmitted by diffuser plate respectively, in indigo plant
In the case that color laser and red laser, green fluorescence transmission light path are shorter, realize two-color laser and fluorescence along same side
To combining output.The combining design of two-color laser dissipation spot optical path and three primary colours light is completed by a component, was both improved
The light processing efficiency of fluorescent wheel, also simplifies the design of peripheral auxiliary optical path, reduces the use of optical component, thus favorably
In the optics framework complexity for reducing two-color laser light source and optics framework volume is reduced, and then is conducive to the small-sized of projection device
Change.
Embodiment 3
The embodiment of the present invention 3 is the modification or improvement on the basis of embodiment 2, same section and beneficial effect with embodiment 2
Details are not described herein.
Unlike embodiment 2, as shown in figure 12, blue laser in the laser light source unit 1 in the embodiment of the present invention
Device 11 and red laser 12 are arranged in parallel, rather than are arranged vertically, it should be noted that blue laser and red swash
The arrangement mode of light device has no effect on the substantive purpose of technical solution of the present invention, and difference is the two vertical arrangement in embodiment 1
When, the thermal component of laser light source can be set in the right angle angle space that the two vertically forms, two kinds of colors of difference
Laser radiates, and when arranged in parallel, thermal component needs to be arranged in the either above or below of two kinds of lasers, radiating part
Part is that the laser of two kinds of colors radiates simultaneously；It is red due to light combination component 22 to be entered and in arranged in parallel
A piece of reflecting mirror 24 is arranged in the needs of laser 12 after the first condenser lens, converts optical path direction, exports red laser
To light combination component 22, it is combined with blue laser.
And since laser facula is after the two panels convex lens in the first focused light passages system is focused, hot spot
Area is small, and energy density is larger, if the spot energy distribution that laser itself is emitted is uneven, can also form small hot spot
After cause local optical energy density excessive, if direct irradiation may cause burning for fluorescence wheel surface, no to fluorescence wheel surface
Conducive to the conversion of fluorescence.It is therefore preferred that one second diffusion sheet 25 is additionally provided between fluorescent wheel and the second condenser lens,
The diffusion sheet can be fixedly installed, and be mainly used for homogenizing the diffusion of blue laser hot spot, it is equally distributed to reach hot spot optical density
Purpose when blue laser hot spot being made to be incident to fluorescence wheel surface, avoids hot-spot and burns.
And red laser light source can also be by the diffusion sheet of the fixed setting, the diffusion sheet of the fixed setting and glimmering
The diffuser plate rotated on halo also provides one quiet one dynamic cooperation, dual diffusion, energy for blue laser and red laser
Enough on the basis of the diffuser plate of fixed setting increases laser space phase, further increased on its basis by the diffuser plate moved
Mostly random space phase, enhancing destroy the degree of interference condition, can be improved the effect of dissipation spot.
The embodiment of the present invention 2 is other than the beneficial effect with above-described embodiment 1, due to being additionally arranged the second diffusion sheet 25,
The laser beam of incident fluorescence wheel can be homogenized, the safety of fluorescence conversion, another aspect and fluorescent wheel on the one hand can be improved
The diffuser plate of upper rotation forms dual dissipation spot system, improves the dissipation spot effect of blue laser and red laser.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of fluorescent wheel, which is characterized in that the fluorescent wheel includes fluorescent powder and inorganic material, the fluorescent powder and inorganic material
Material is mixed to form disc wafer；The substrate includes phosphor region, and the phosphor region includes fluorescence coating, and be located at fluorescence coating it
On plated film；The plated film is used for transmission laser excitation light and reflected fluorescent light.
2. fluorescent wheel according to claim 1, which is characterized in that the fluorescent wheel further includes non-fluorescence area, described non-glimmering
Light area is used to spread laser.
3. fluorescent wheel according to claim 2, which is characterized in that the non-fluorescence area be on substrate formed arc-shaped or
Sector notch, the indentation, there are provided with diffuser plate.
4. fluorescent wheel according to claim 1, which is characterized in that the inorganic material includes ceramics, quartz or glass.
5. fluorescent wheel according to claim 1, which is characterized in that the fluorescence coating is mixed solid by fluorescent powder and inorganic material
Change and is formed.
6. fluorescent wheel according to claim 3, which is characterized in that the diffuser plate is to laser light scattering or diffraction.
7. any fluorescent wheel according to claim 1 ~ 6, which is characterized in that the substrate is transparent substrate.
8. a kind of laser light source, which is characterized in that any for issuing laser and the claims 1 ~ 7 including laser
The fluorescent wheel, and, further include be set to the positive condenser lens of the fluorescent wheel, and, be incident in laser beam
Diffusion sheet is further fixedly arranged in the positive optical path of fluorescent wheel.
9. laser light source according to claim 8, which is characterized in that
The fluorescent wheel back side is provided with the first collimation lens set, for collimating to the light beam for transmiting the fluorescent wheel.
10. laser light source according to claim 9, which is characterized in that the laser light source further includes light collecting device, in institute
It states and is additionally provided with condenser lens between the fluorescent wheel back side and the light collecting device, for focusing from fluorescent wheel back side outgoing
Laser and fluorescence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811626479.4A CN109581796A (en) | 2015-10-14 | 2015-10-14 | A kind of fluorescent wheel and laser light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510657074.7A CN106597785B (en) | 2015-10-14 | 2015-10-14 | A kind of fluorescent wheel and two-color laser light source |
| CN201811626479.4A CN109581796A (en) | 2015-10-14 | 2015-10-14 | A kind of fluorescent wheel and laser light source |
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| CN201510657074.7A Division CN106597785B (en) | 2015-10-14 | 2015-10-14 | A kind of fluorescent wheel and two-color laser light source |
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| CN201510657074.7A Active CN106597785B (en) | 2015-10-14 | 2015-10-14 | A kind of fluorescent wheel and two-color laser light source |
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| CN110032034A (en) * | 2019-04-29 | 2019-07-19 | 杭州有人光电技术有限公司 | A kind of projecting illumination system using laser induced fluorescence |
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Also Published As
| Publication number | Publication date |
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| CN106597785B (en) | 2019-02-22 |
| CN106597785A (en) | 2017-04-26 |
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Application publication date: 20190405 |