CN103912848B - A kind of fluorescent powder color wheel utilizing diffuse-reflectance substrate to carry out optical design and preparation method thereof - Google Patents
A kind of fluorescent powder color wheel utilizing diffuse-reflectance substrate to carry out optical design and preparation method thereof Download PDFInfo
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- CN103912848B CN103912848B CN201410061118.5A CN201410061118A CN103912848B CN 103912848 B CN103912848 B CN 103912848B CN 201410061118 A CN201410061118 A CN 201410061118A CN 103912848 B CN103912848 B CN 103912848B
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Abstract
The present invention relates to a kind of fluorescent powder color wheel utilizing diffuse-reflectance substrate to carry out optical design and method for designing thereof.The invention provides one and there is irreflexive substrate, to improve the utilization rate of fluorescent material in fluorescent powder color wheel, strengthen the whole lighting efficiency of fluorescent powder color wheel, the problem improving fluorescent powder color wheel local pyrexia.
Description
Technical field
The present invention relates to the method that the fluorescent powder color wheel of a kind of new type of substrate makes and light path optimizes, refer more particularly to one and utilize diffuse-reflectance substrate manufacture fluorescent powder color wheel, improve fluorescent material utilization ratio, strengthen fluorescent powder color wheel whole lighting efficiency, the problem improving fluorescent powder color wheel local pyrexia, and utilize diffuse-reflectance substrate to carry out the optical design method to optimize light path.
Background technology
Now, increasing scialyscope selects mainly to utilize LED (lightEmittingDiode) or LD (LaserDiode) as display light source, and one of which pattern is to directly utilize polychrome excitation source to send the light of the different wave length such as red, green or blue and realize colour display as light source；Another is then utilize a kind of red or green or blueness as light source, recycles it and excites, changes out other two kinds of three primary colories, realizes colour projection eventually through modulation light path and show.US Patent No. 7547114B2 proposes a kind of method producing high brightness sequential coloured light, and excitated fluorescent powder material emission on a fluorescent material rotating disk is collected and focused on to excitation source by the method, and along with the color sequence of light rotating generation periodic timing of rotating disk；Use the method can produce the projection light source of high brightness.By the fluorescent powder color wheel that this principle is used, it is typically on substrate being coated with the fluorescence pink colour section/lamella of one or more different colours, different excitation spectrum, the light of different wave length color is inspired thereby through LED or LD light source, and in this, as the light source of scialyscope.
At present, making of fluorescent powder color wheel mainly has coating fluorescent material on the substrate of high reflectance at certain, improves the utilization ratio of fluorescent material with this, strengthens the whole lighting efficiency of fluorescent powder color wheel.Therefore, the substrate that common fluorescent powder color wheel uses mostly is the mirror metal material being coated with metal high-reflecting film such as aluminum film or silverskin etc..Owing to laser spot diameter is typically in about 1.5 ~ 2mm, and the width of fluorescence pink colour section is typically in about 4 ~ 4.5mm (these parameters are specifically dependent upon the light path design receiving optical lens etc.), incident laser at fluorescence pink colour intrasegmental part due to the scattering process of fluorescent powder grain, hot spot can expand to some extent, about about 3mm, therefore at the diverse location of fluorescence pink colour intrasegmental part, the light distribution of incident laser is uneven, and this means that the fluorescence pink colour section of a part is not fully utilized；And less laser facula unit energy is excessively strong, can make the temperature drift of localized fluorescence pink colour section so that luminous efficiency also can reduce accordingly, the life-span of local fluorescent material color section and substrate is exerted an adverse impact simultaneously.
And, due to the demand spread for light in complete machine light path, light path design generally requires and adds other with the optics (such as diffusion sheet etc.) expanding astigmatism functions, be combined use with fluorescent powder color wheel, complicated complete machine light path design, adds light-source system cost.
The not enough problem of defect and improved method in order to solve above-mentioned existing conventional fluorescent pink colour wheel, the present invention proposes " utilizing substrate diffuse-reflectance optical design to improve fluorescent material utilization ratio and the method to the optimization of light path design thereof ".
Summary of the invention
The present invention is to solve the foregoing problems of existing fluorescent powder color wheel, provide one and there is irreflexive substrate, to improve the utilization rate of fluorescent material in fluorescent powder color wheel, strengthen the whole lighting efficiency of fluorescent powder color wheel, the problem improving fluorescent powder color wheel local pyrexia, it is possible to light path design is optimized.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: utilize substrate diffuse-reflectance (wave band 100 ~ 760nm, diffuse-reflectance rate 10% ~ 100%, including specular reflectivity, absorbance, absorbance and scattered power) optical design, substrate is coated with fluorescent material, makes fluorescent powder color wheel.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: utilize substrate diffuse-reflectance (wave band 100 ~ 760nm, diffuse-reflectance rate 10% ~ 100%, including specular reflectivity, absorbance, absorbance and scattered power) optical design, make the substrate of fluorescent powder color wheel itself have the astigmatism functions of certain diffusion sheet, such that it is able to replace in existing light path some optics playing astigmatism effect (such as diffusion sheet, with the colour wheel etc. of diffusion sheet).
Diffuse-reflectance substrate involved in the present invention, refer to full spectrum (100nm-760nm) diffuse-reflectance (diffuse-reflectance rate 10% ~ 100%) direct reflection in visible ray and ultraviolet light range, transmitance and absorbance sum are 1% ~ 80%) substrate, but be not limited to wavelengths above scope.The colour wheel produced heat when fluorescent material is excited made can be carried out playing the function of high efficiency and heat radiation by this substrate simultaneously.
Diffuse-reflectance baseplate material involved in the present invention includes metal, nonmetal, organic material or inorganic material or composite substrate or above-mentioned material two kinds and two or more composite base plates, also include that there is the irreflexive metal of certain limit, high-molecular organic material such as high whiteness nylon/plastics/Teflon etc., high whiteness nonmetallic compound material is such as pottery (including the ceramic idiosome of sintered ceramic body and un-sintered mistake) etc., but is not limited to above-mentioned material.
Substrate surface irreflexive formation processing method includes: adopt powder metallurgy sintered mode or the high pressure mode such as cold pressing to obtain that the metallic compound of the homogenous material system of high whiteness or heterogeneous material system mixture is such as single-phase or multiphase ceramic, ceramic metal etc., and obtains and have high irreflexive metal surface or have the nonmetallic surface such as high polymer of high whiteness；2) for all surface roughening process of metal surface or nonmetallic surface, for instance surface sand-blasting roughening process etc.；3) substrate surface realizes the composite surface material preparation technology of high diffuse-reflective material coating or coating, including adopting thermal spraying or the mode such as flame-spraying or electric arc plating, adopting the plating of Typical spray, electrochemistry or be coated with ceramic glaze or swabbing mode, form one or more layers thin film with high diffuse-reflectance effect or coating or glaze layer or coating at described substrate surface.It is not limited to above several ways.4) substrate surface can make the three-dimensional convex-concave structure with submillimeter level, is beneficial to strengthen further dispersion effect..
The surface diffuse reflectance of substrate diffusing film or coating or coating or glaze layer or substrate body processes technique, its finish materials can select the material system with surface height diffuse-reflectance feature, such as high purity aluminium oxide, magnesium oxide, titanium oxide, zirconium oxide, Barium monoxide, calcium phosphate, barium phosphate, barium sulfate, calcium silicates, calcium carbonate, boron nitride, Zirconium orthosilicate., (oxygen) zirconium chloride, the nitride such as quartz, oxide, sulfide, phosphide, boride, aluminate, silicate, borate, carbonate, one or several in chloride and the contour whiteness material of high white clay, it is not limited to above different materials.
The surface with diffuse-reflectance or scattering of substrate can be all surfaces of substrate, side or part surface or side.
Machining or any type of processing modes such as the shape of diffuse-reflectance substrate can be triangle, circular, square or other any regular or irregularly shaped, and substrate can carry out or not carry out any extruding, cutting, laser.
The light path design that the existence of diffuse-reflectance substrate optimizes includes but not limited to: combine the combination that excitation beam produces reflection and scattering process, saves the optics with diffusion function, simplifies light path, saves optical path space etc.
It is an object of the invention to provide a kind of novel fluorescent powder color wheel diffuse-reflectance substrate optical design, the hot spot that excitation beam is formed on substrate through fluorescent material lamella carries out a degree of diffusion, to improve the fluorescent material utilization ratio of fluorescent powder color wheel, strengthen the whole lighting efficiency of fluorescent powder color wheel, the problem improving fluorescent powder color wheel local pyrexia, and utilize diffuse-reflectance substrate to carry out optical design to optimize light path.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the hot spot schematic diagram of existing common fluorescent powder color wheel board structure and formation.
Fig. 2 is the hot spot schematic diagram of the fluorescent powder color wheel board structure of the embodiment of the present invention one and formation.
Fig. 3 is the fluorescent powder color wheel board structure schematic diagram of the embodiment of the present invention five.
Fig. 4 is the fluorescent powder color wheel board structure schematic cross-section of the embodiment of the present invention five.
Fig. 5 is the hot spot schematic diagram that high specular reflectivity 98% substrate is formed.
Fig. 6 is the hot spot schematic diagram that diffuse-reflectance rate 80% substrate is formed.
Fig. 7 is the hot spot schematic diagram that diffuse-reflectance rate 97% substrate is formed.
Detailed description of the invention
Embodiment one:
On the circular substrate 10 of the metallic aluminium that diameter is 40mm, carry out surface diffuse reflectance layer 501 to process, adopt in 100nm ~ 760nm wave-length coverage, the white glaze material coating of diffuse-reflectance rate 80% and aluminium base 10 form diffuse-reflectance layer 501, the reflectance of substrate entirety is 98%, wherein diffuse-reflectance rate is 80%, and specular reflectivity is 18%.Being coated with fluorescent material by the mode of some glue or spraying or printing on the surface of diffuse-reflectance layer 501, form fluorescent material lamella 20, the width of fluorescent material lamella 20 is 4mm, and thickness is 0.2mm.The laser beam 102 that LASER Light Source 101 sends injects fluorescent material lamella 20 with the angle of incidence of 45 degree, under the scattering process of fluorescent powder grain itself and the diffuse-reflectance effect of substrate, fluorescent material lamella 20 defines the hot spot 32 of 3.5mm diameter, and forms reflection light beam 103.The reflection light beam 103 that fluorescent material is inspired by receipts optical lens 40 carries out receiving light.With under similarity condition compared with common silver plated metals aluminium base, the reflectance of substrate 10 is the diffuse-reflectance rate of 98%(substrate surface 501 is 80%, specular reflectivity is 18%), the reflectance on silver plated metals aluminium base surface as a comparison is similarly 98%, in this case, adopt the substrate of same material and duplicate experiment condition, it was found that the light efficiency of the fluorescent powder color wheel of the present embodiment improves 6%.Concrete data are in Table 1.
Embodiment two:
On the ceramic circular substrate 10 that diameter is 40mm, carry out surface diffuse reflectance layer 501 to process, adopt in 100nm ~ 760nm wave-length coverage, diffuse-reflectance rate is the coating of white glaze material and the formation diffuse-reflectance layer 501 on ceramic circular substrate 10 of 10%, the reflectance of substrate entirety is 98%, wherein diffuse-reflectance rate is 10%, and specular reflectivity is 18%.Being coated with fluorescent material by the mode of some glue or spraying or printing on the surface of diffuse-reflectance layer 501, form fluorescent material lamella 20, the width of fluorescent material lamella 20 is 4mm, and thickness is 0.2mm.The laser beam 102 that LASER Light Source 101 sends injects fluorescent material lamella 20 with the angle of incidence of 45 degree, under the scattering process of fluorescent powder grain itself and the diffuse-reflectance effect of substrate, fluorescent material lamella 20 defines the hot spot 32 of 3.5mm diameter, and forms reflection light beam 103.The reflection light beam 103 that fluorescent material is inspired by receipts optical lens 40 carries out receiving light.The reflectance on silver plated metals aluminium base surface as a comparison is similarly 98%, in this case, adopts the substrate of same material and duplicate experiment condition, it was found that the light efficiency of the fluorescent powder color wheel of the present embodiment improves 1%.Concrete data are in Table 1.
Embodiment three:
On the circular substrate 10 of the metallic iron that diameter is 40mm, carry out surface diffuse reflectance layer 501 to process, adopt in 100nm ~ 760nm wave-length coverage, diffuse-reflectance rate is the coating of white glaze material and the formation diffuse-reflectance layer 501 on the circular substrate of genus ferrum of 60%, the reflectance of substrate entirety is 98%, wherein diffuse-reflectance rate is 60%, and specular reflectivity is 18%.Being coated with fluorescent material by the mode of some glue or spraying or printing on the surface of diffuse-reflectance layer 501, form fluorescent material lamella 20, the width of fluorescent material lamella 20 is 4mm, and thickness is 0.2mm.The laser beam 102 that LASER Light Source 101 sends injects fluorescent material lamella 20 with the angle of incidence of 45 degree, under the scattering process of fluorescent powder grain itself and the diffuse-reflectance effect of substrate, fluorescent material lamella 20 defines the hot spot 32 of 3.5mm diameter, and forms reflection light beam 103.The reflection light beam 103 that fluorescent material is inspired by receipts optical lens 40 carries out receiving light.The reflectance on silver plated metals aluminium base surface as a comparison is similarly 98%, in this case, adopts the substrate of same material and duplicate experiment condition, it was found that the light efficiency of the fluorescent powder color wheel of the present embodiment improves 3%.Concrete data are in Table 1.
Embodiment four:
On the circular substrate 10 of the metallic copper that diameter is 40mm, carry out surface diffuse reflectance layer 501 to process, adopt in 100nm ~ 760nm wave-length coverage, diffuse-reflectance rate is the coating of white glaze material and the formation diffuse-reflectance layer 501 on the circular substrate of metallic copper of 60%, the reflectance of substrate entirety is 98%, wherein diffuse-reflectance rate is 60%, and specular reflectivity is 18%.Being coated with fluorescent material by the mode of some glue or spraying or printing on the surface of diffuse-reflectance layer 501, form fluorescent material lamella 20, the width of fluorescent material lamella 20 is 4mm, and thickness is 0.2mm.The laser beam 102 that LASER Light Source 101 sends injects fluorescent material lamella 20 with the angle of incidence of 45 degree, under the scattering process of fluorescent powder grain itself and the diffuse-reflectance effect of substrate, fluorescent material lamella 20 defines the hot spot 32 of 3.5mm diameter, and forms reflection light beam 103.The reflection light beam 103 that fluorescent material is inspired by receipts optical lens 40 carries out receiving light.The reflectance on silver plated metals aluminium base surface as a comparison is similarly 98%, in this case, adopts the substrate of same material and duplicate experiment condition, it was found that the light efficiency of the fluorescent powder color wheel of the present embodiment improves 0.5%.Concrete data are in Table 1
Embodiment five:
Fig. 5 show the present invention and uses fluorescent powder color wheel board structure.The metallic aluminium circular ring plate substrate 11 using diameter to be 50mm, mechanical presses processing mode, during with substrate 11 horizontal positioned, the lowest surfaces of upper surface is for datum level, it is pre-formed with metallic aluminium circular ring plate substrate external diameter for benchmark, width is 4mm, the degree of depth is-0.2mm, and angle is the recessed fluorescent powder coating region 20 of 300 degree.By spraying coating process, on the surface of the non-recessed area of substrate 11, form the diffuse-reflectance layer 502 with high diffuse-reflectance rate 70%, and be finally made fluorescent powder color wheel.The high diffuse-reflectance region 502 of this fluorescent powder color wheel, it is possible to the segment beam of LASER Light Source is played light diffusion, eliminates the use of diffusion sheet in light path, optimizes light path design.
Above-described embodiment is only several instantiations of the present invention, not the technology of the present invention scope is done any restriction.Every any amendment above embodiment made according to the technical spirit of the present invention, equivalent variations and modification, all still fall within technology contents and the category of the present invention.
Table 1 is the silver-plated high direct reflection substrate of the standard of the diffuse-reflectance substrate in all embodiments of the present invention, is respectively prepared the light efficiency comparable situation after fluorescent powder color wheel.
| Embodiment | The specular reflectivity in substrate surface reflecting layer | The diffuse-reflectance rate of substrate surface layer | The transmitance of substrate surface layer adds absorbance | The light efficiency that excites of the fluorescent powder color wheel made compares (20W) |
| Embodiment one | 18% | 80% | 2% | 1.06 |
| Embodiment two | 88% | 10% | 2% | 1.01 |
| Embodiment three | 37% | 60% | 3% | 1.03 |
| Embodiment four | - | 97% | 3% | 1.005 |
| Contrast standard sample | 93% | 5% | 2% | 1.00 |
Note: contrast standard sample refers to the fluorescent powder coating carried out after plating height reflection silver film on metal aluminum substrate and makes fluorescent powder color wheel.
Claims (1)
1. one kind utilizes the fluorescent powder color wheel that diffuse-reflectance substrate carries out optical design, it is characterized in that, on the circular substrate (10) of the metallic aluminium that diameter is 40mm, carry out surface diffuse reflectance layer (501) to process, aluminium base (10) is upper forms diffuse-reflectance layer (501) to adopt 100nm ~ 760nm wave-length coverage white glaze material interior, diffuse-reflectance rate 80% to coat, the reflectance of substrate entirety is 98%, and wherein diffuse-reflectance rate is 80%, and specular reflectivity is 18%；
The surface of diffuse-reflectance layer (501) is coated with fluorescent material by the mode of some glue or spraying or printing, form fluorescent material lamella (20), the width of fluorescent material lamella (20) is 4mm, thickness is 0.2mm, thus forming the fluorescent powder color wheel including aluminium base (10), diffuse-reflectance layer (501) and fluorescent material lamella (20)；The laser beam (102) that LASER Light Source (101) sends injects fluorescent material lamella (20) with the angle of incidence of 45 degree, under the scattering process of fluorescent powder grain itself and the diffuse-reflectance effect of substrate, fluorescent material lamella (20) defines the hot spot (32) of 3.5mm diameter, and forming reflection light beam (103), the reflection light beam (103) that fluorescent material is inspired by receipts optical lens (40) carries out receiving light.
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| CN105738994B (en) * | 2014-12-10 | 2019-07-02 | 深圳光峰科技股份有限公司 | Wavelength converter and related lighting device, fluorescence colour wheel and projection arrangement |
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| CN108267914B (en) * | 2016-12-30 | 2022-01-11 | 中强光电股份有限公司 | Wavelength conversion device and projector thereof |
| CN207851495U (en) | 2018-02-14 | 2018-09-11 | 中强光电股份有限公司 | Wavelength convert wheel and projection arrangement |
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