CN102620244A - Fluorescent wheel system, projector and light collimation and convergence method - Google Patents
Fluorescent wheel system, projector and light collimation and convergence method Download PDFInfo
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- CN102620244A CN102620244A CN2012100622566A CN201210062256A CN102620244A CN 102620244 A CN102620244 A CN 102620244A CN 2012100622566 A CN2012100622566 A CN 2012100622566A CN 201210062256 A CN201210062256 A CN 201210062256A CN 102620244 A CN102620244 A CN 102620244A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 43
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Abstract
The embodiment of the invention discloses a fluorescent wheel system, a projector and a light collimation and convergence method, which relates to the field of the projectors and can effectively improve the brightness of a light source. The fluorescent wheel system disclosed by the embodiment of the invention comprises a fluorescent wheel, an optical lens and at least one optical collimation part, wherein the optical lens is assembled in front of the fluorescent wheel, the fluorescent wheel comprises a baseplate and a fluorescent powder layer which is annularly coated on the baseplate, the optical lens is used for converging light generated by the fluorescent powder layer after the light is excited, and the optical collimation part is used for collimating the light which is converged and passes through the optical lens.
Description
Technical field
The present invention relates to field of projector, relate in particular to the method that a kind of fluorescence wheel system, the projector that uses this fluorescence wheel system and light collimation are assembled.
Background technology
Along with the development of technology, the direction more and more littler towards volume, that brightness is increasingly high of Projection Display product in the market develops.Because novel solid state light emitter projector adopts the light source of light-emitting phosphor mostly; Be about to the annulus that fluorescent material is coated in round metal substrate; When projector works; The light beam irradiates that LD (Laser Diode, semiconductor laser) sends on the fluorescent material of the fluorescence wheel of rotation, the light of fluorescent material stimulated emission corresponding color.Because fluorescent material is the outgoing of near space 360 degree, so light energy collection has bigger difficulty, the low luminance shortage that finally causes the light source of projector of the utilization rate of luminous energy.
In order to improve the brightness of light source, the output that can increase exciting light, but the quantity that needs to use the bigger excitation source of amount of power consumption or increase excitation source, obviously above two kinds of methods are difficult to be applied to become in recent years in the electrical equipment of miniaturization.The brightness that how under the prerequisite of the volume that does not increase projector, to improve light source becomes a difficult problem being badly in need of solution.
The technical scheme that adopts at present is the set of lenses and the independent respectively assembling of fluorescence wheel of shaping light beam, but the distance between the eyeglass of set of lenses and the fluorescence wheel is difficult to accurately control and distance usually will be more than 1mm.Therefore in optical design; Excite hot spot bigger through overconvergence; Increased the optical extend of stimulated light emission, for follow-up optical design has brought great difficulty, simultaneously because fluorescent material is space all directions bright dipping; So the above spacing of 1mm causes having only part luminous energy to receive, and the distance that can't accurately control causes receiving efficiency also unstable.
Summary of the invention
Embodiments of the invention technical problem to be solved is to provide the method for a kind of fluorescence wheel system, projector and the convergence of light collimation, can obviously improve the brightness and the utilization rate of light source, reduces the volume of projector.
For solving the problems of the technologies described above, embodiments of the invention adopt following technical scheme:
A kind of fluorescence wheel system; It is characterized in that; The optical mirror slip and at least one optical alignment parts that comprise the fluorescence wheel and be assemblied in said fluorescence wheel the place ahead; Said fluorescence wheel comprises that substrate and annular are coated on the phosphor powder layer on the said substrate, and said optical mirror slip is used to assemble the light that said phosphor powder layer is excited the back generation, and said optical alignment parts are used for collimation and assemble the light that sees through said optical mirror slip.
Said optical mirror slip is convex lens structures or month odontoscope structure or aspherical mirror, the microlens array structure of perhaps being made up of miniature convex lens or miniature month odontoscope.
Said optical alignment parts are specially convex lens structures or month odontoscope structure or aspherical mirror.
Said substrate is provided with Baltimore groove, and in order to assemble the light that sees through phosphor powder layer, said phosphor powder layer is positioned at said Baltimore groove.
The degree of depth of said Baltimore groove is lower than or equals the thickness of said phosphor powder layer, and said optical mirror slip is sealed in said phosphor powder layer in the said Baltimore groove fully.
Said Baltimore groove intermediate reach is equipped with the sub-optical mirror slip of several parabolic shape, and said sub-optical mirror slip is a microlens array structure.
Said substrate is the reflection-type substrate.
The focal length of the lens set that said optical alignment parts and said optical mirror slip are formed is less than 1 millimeter, and the distance between said optical mirror slip and the said optical alignment parts is less than 1.5 millimeters.
A kind of projector comprises above-mentioned any described fluorescence wheel system.
The method that a kind of light collimation is assembled comprises:
Optical alignment parts and optical mirror slip be the exciting light of converging parallel incident successively; Form incident light source; Said optical mirror slip is assemblied in the place ahead of said fluorescence wheel; And between said optical alignment parts and said phosphor powder layer, the focus of the lens set that said optical alignment parts and said optical mirror slip are formed is positioned on the phosphor powder layer;
Optical mirror slip is assembled and is excited the light that produces behind the said phosphor powder layer through said incident light source;
The optical alignment parts receive the light that sees through said optical mirror slip, and convert the said light that sees through said optical mirror slip into parallel emergent ray.
The method that the fluorescence wheel system of the embodiment of the invention, projector and light collimation are assembled; Through assembling optical mirror slip and at least one optical alignment parts be set in fluorescence wheel the place ahead; With the light of assembling, collimation produces after said phosphor powder layer excites; Effectively improve the brightness of light source, reduced manufacture difficulty, reduced the volume of projector.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the side view of fluorescence wheel system and beam shaping system in the embodiment of the invention;
Fig. 2 is the schematic perspective view of fluorescence wheel in the embodiment of the invention;
Fig. 3 is the sketch map of the fluorescence wheel of micro lens array for optical mirror slip in the embodiment of the invention;
The sketch map that Fig. 4 takes turns for the fluorescence that has Baltimore groove in the embodiment of the invention;
The sketch map that Fig. 5 takes turns for the fluorescence that has sub-optical mirror slip in the embodiment of the invention;
Fig. 6 is that optical mirror slip is the sketch map of month odontoscope structure and non-spherical structure in the embodiment of the invention;
Fig. 7 is the sketch map of lens set for optics design in the embodiment of the invention;
Fig. 8 is the fluorescence wheel system sketch map of transmission-type substrate for substrate in the embodiment of the invention;
Fig. 9 is the schematic flow sheet of the method that the light collimation is assembled in the embodiment of the invention.
The specific embodiment
The method that the embodiment of the invention provides a kind of fluorescence wheel system, projector and light collimation to assemble, the brightness that has effectively improved light source.
Below in conjunction with accompanying drawing the embodiment of the invention is done detailed description.
Present embodiment provides a kind of fluorescence wheel system; As depicted in figs. 1 and 2; Comprise fluorescence wheel 1, optical mirror slip 2 and at least one optical alignment parts 3, optical mirror slip 2 is assemblied in the place ahead of fluorescence wheel, and said fluorescence wheel 1 comprises that substrate 11 and annular are coated on the phosphor powder layer 12 on the substrate 11; Optical mirror slip 2 is used to assemble the light that phosphor powder layer 12 is excited the back generation, and optical alignment parts 3 are used for collimation and assemble the light that sees through optical mirror slip 2.
Present embodiment reduces the optical extend of optical system and increases brightness output through assembling optical mirror slip 2 in fluorescence wheel the place ahead and optical alignment parts 3 being set.After the system works, fluorescence wheel 1 is quick rotation along the axle center, and excitation source is opened simultaneously.In the present embodiment, the distance between optical alignment parts 3 and the fluorescence wheel 1 can be designed as ultrashort operating distance, such as being 0.05mm.Because for the optical alignment parts 3 with the same focal length, the diameter of eyeglass is more little, the thickness of eyeglass is also thin more, and therefore fluorescence wheel system of the present invention can also reduce the volume of projector in the brightness that improves light source.In addition, because therefore the distance between optical mirror slip 2 and the fluorescence wheel 1 can reduce assembly difficulty greatly through accurately control of pad is set between optical mirror slip 2 and fluorescence wheel 1.
Light shown in dotted portion among Fig. 1; The exciting light of parallel incident at first through the convergence of optical alignment parts 3, passes through the convergence of optical mirror slip 2 again, and optical alignment parts 3 can be converged to a very little hot spot point with directional light with the lens set that optical mirror slip 2 is formed; The exciting light that is about to parallel incident is focused at the focal position of the lens set of optical alignment parts 3 and optical mirror slip 2 compositions; Form incident light source, wherein, focus just is positioned on the phosphor powder layer; The exciting light of parallel like this incident finally is converged to a small light spot through twice convergence on phosphor powder layer 12.After projector started working, along with the rotation of fluorescence wheel 1, the position of static relatively incident light source fluorescence excitation bisque 12 was in continuous variation.The light that produces after phosphor powder layer 12 in incident light source hot spot point is stimulated is to all directions outgoing.As one embodiment of the present invention, substrate 11 is the reflection-type substrate, and therefore, because the reflex of substrate 11 changes direction, the whole lighting angle that makes fluorescent material is space 180 degree with exciting light emergent light in the same way.Obviously, for the optical mirror slip 2 of same diameter, near more apart from fluorescence wheel 1, the luminous energy of convergence is just many more, because the present invention directly has been assemblied in optical mirror slip 2 on the fluorescence wheel 1, so most emergent lights has obtained collection, has improved collection efficiency.Light shown in solid line part among Fig. 1, optical alignment parts 3 receive the light that sees through optical mirror slip again, and will convert parallel emergent ray through the light of optical mirror slip 2 into, have realized the collimation of light.
Optical glass is that the oxide with high purity silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium etc. mixes by special formulation; High temperature melt in platinum crucible, even with ultrasonic stirring, bubble degass; The long-time cooling lentamente of warp forms then, has avoided producing in the glass blocks internal stress.Cooled glass blocks also will be measured through optical instrument, and checks purity, transparency, the uniformity, refractive index and dispersive power whether to close specification, and optical glass has advantages such as processability is good, the life-span is long, can also cooperate plated film to use.Therefore, the optical mirror slip 2 that uses optical glass to produce has stable in properties, is difficult for oxidized characteristics.
Preferably, the focal length of the lens set that the optical alignment parts 3 of present embodiment and said optical mirror slip are formed is less than 1 millimeter, and the distance between optical mirror slip 2 and the optical alignment parts 3 is less than 1.5 millimeters.Concrete, optical alignment parts 3 can be convex lens structures, also can be month odontoscope structure or concavees lens structure or aspherical mirror structure, preferred convex lens structures.
As one embodiment of the present invention; Optical mirror slip 2 may further be planoconvex spotlight, and planar section contacts with phosphor powder layer 12, has further completely cut off contacting of fluorescent material and air; Prevent phosphor powder layer 12 contaminated and oxidations, prolong the service life of fluorescence wheel.Because fluorescent material is when receiving the excitation beam effect; Itself has also produced great amount of heat; Mainly lean on substrate 11 heat conduction than original technology, eyeglass has also played the effect of conduction fluorescent material heat among the present invention, has reduced the operating temperature of fluorescent material; Increase substantially the life-span of fluorescence wheel 1, and then prolonged the life-span of projector.In addition, optical mirror slip 2 also can and fluorescence keep certain clearance between taking turns 1.
The microlens array structure that optical mirror slip 2 in the present embodiment can also be made up of convex lens structures or month odontoscope structure or concavees lens structure or aspherical mirror structure, as shown in Figure 3.Than traditional lens arrangement, microlens array can design littler aberration, the thickness that more approaches under the same equivalent focal length, so microlens array reduces eyeglass volume and cost and all has very great help for the compression light beam dispersion angle.
Further, the substrate 11 of present embodiment is provided with Baltimore groove, and phosphor powder layer 12 is positioned at Baltimore groove, therefore, the exciting light that passes phosphor powder layer 12 when arriving substrate 11, receive Baltimore groove curved surface effect and assemble.Substrate 11 in the present embodiment can be selected the reflection-type substrate, and metal substrate for example is with better converging ray.In addition, Baltimore groove can be the above Baltimore groove with one heart of two rings or two rings.
Preferably; As shown in Figure 4, the thickness of the degree of depth of Baltimore groove and phosphor powder layer 12 is identical or be lower than the thickness of phosphor powder layer 12, like this; Optical mirror slip 2 just can be sealed in phosphor powder layer 12 in the Baltimore groove fully, avoids phosphor powder layer 12 oxidation takes place and to be polluted because of contacting with air.Baltimore groove and lens play the effect of converging ray jointly.
Further, as shown in Figure 5, for better assembling the light that passes phosphor powder layer 12, present embodiment is equipped with the sub-optical mirror slip 13 of several parabolic shape at the Baltimore groove intermediate reach.Preferably, sub-optical mirror slip 13 is a microlens array structure.
Further, for reaching better spotlight effect, phosphor powder layer 12 is positioned at the along of the curved surface of Baltimore groove.
Further, the substrate 11 in the present embodiment can be the transmission-type substrate, and is as shown in Figure 8.First optical alignment parts and first optical mirror slip at first are converged to a little hot spot point with the exciting light of parallel incident and shine on the phosphor powder layer 12.Optical mirror slip 2 can gather the light that phosphor powder layer 12 is stimulated and afterwards produces again, and then will convert parallel emergent ray through the light of optical mirror slip 2 into by second optical alignment parts 3.The principle that collimation is assembled repeats no more at this with above-mentioned reflection-type substrate.In addition, optical mirror slip 2 and at least one optical alignment parts 3, the structure of the lens set that also can be designed to independently to install.
Further, be better optically focused and printing opacity, optical mirror slip 2 all can plate one deck highly reflecting films and anti-reflection film with substrate 11.
Present embodiment also provides a kind of projector, comprises above-described fluorescence wheel system.Above-mentioned fluorescence wheel system can be applied in the projector of various different frameworks, belongs to technology as well known to those skilled in the art, repeats no more at this.
The method that present embodiment also provides a kind of light collimation to assemble need to prove that the method for present embodiment adopts above-mentioned fluorescence wheel system, and is that the reflection-type substrate is that example describes with substrate 11, like Fig. 1 and shown in Figure 9.
Step 101, optical alignment parts and optical mirror slip be the exciting light of converging parallel incident successively; Form incident light source; Said optical mirror slip is assemblied in the place ahead of said fluorescence wheel; And between said optical alignment parts and said phosphor powder layer, the focus of the lens set that said optical alignment parts and said optical mirror slip are formed is positioned on the phosphor powder layer;
Step 102, optical mirror slip are assembled and are excited the light that produces behind the said phosphor powder layer through said incident light source;
Step 103, optical alignment parts receive the light that sees through said optical mirror slip, and convert the said light that sees through said optical mirror slip into parallel emergent ray.
Light shown in dotted portion among Fig. 1; The exciting light of parallel incident at first through the convergence of optical alignment parts 3, passes through the convergence of optical mirror slip 2 again, and optical alignment parts 3 can be converged to a very little hot spot point with directional light with the lens set that optical mirror slip 2 is formed; The exciting light that is about to parallel incident is focused at the focal position of the lens set of optical alignment parts 3 and optical mirror slip 2 compositions; Form incident light source, wherein, focus just is positioned on the phosphor powder layer; The exciting light of parallel like this incident finally is converged to a small light spot through twice convergence on phosphor powder layer 12.After projector started working, along with the rotation of fluorescence wheel, the position of static relatively incident light source fluorescence excitation bisque was in continuous variation.The light that produces after phosphor powder layer in the excitation light spot is stimulated is to all directions outgoing.As one embodiment of the present invention, substrate is the reflection-type substrate, and therefore, because the reflex of substrate changes direction, the whole lighting angle that makes fluorescent material is space 180 degree with exciting light emergent light in the same way.Obviously, for the optical mirror slip of same diameter, near more apart from the fluorescence wheel, the luminous energy of convergence is just many more, because the present invention directly has been assemblied in optical mirror slip on the fluorescence wheel, so most emergent lights has obtained collection, has improved collection efficiency.Light shown in solid line part among Fig. 1, the optical alignment parts receive the light through optical mirror slip again, and will convert parallel emergent ray through the light of optical mirror slip into, have realized the collimation of light.
Further, the focal length of the lens set that optical alignment parts and optical mirror slip are formed is less than 1 millimeter, and the distance between said optical mirror slip and the said optical alignment parts is less than 1.5 millimeters.
The operation principle of optical mirror slip and optical alignment parts repeats no more at this with above-mentioned fluorescence wheel system in the present embodiment.In addition, be the situation of transmission-type substrate for substrate, the method for present embodiment is suitable for too.
The above; Be merely the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of said claim.
Claims (10)
1. fluorescence wheel system; It is characterized in that; Comprise fluorescence wheel, optical mirror slip and at least one optical alignment parts, said optical mirror slip is assemblied in the place ahead of said fluorescence wheel, and said fluorescence wheel comprises that substrate and annular are coated on the phosphor powder layer on the said substrate; Said optical mirror slip is used to assemble the light that said phosphor powder layer is excited the back generation, and said optical alignment parts are used for collimation and assemble the light that sees through said optical mirror slip.
2. fluorescence wheel system according to claim 1 is characterized in that, said optical mirror slip is convex lens structures or month odontoscope structure or aspherical mirror, the microlens array structure of perhaps being made up of miniature convex lens or miniature month odontoscope.
3. fluorescence wheel system according to claim 1 is characterized in that, said optical alignment parts are specially convex lens structures or month odontoscope structure or aspherical mirror.
4. fluorescence wheel system according to claim 1 is characterized in that said substrate is provided with Baltimore groove, and in order to assemble the light that sees through phosphor powder layer, said phosphor powder layer is positioned at said Baltimore groove.
5. fluorescence wheel system according to claim 4 is characterized in that the degree of depth of said Baltimore groove is lower than or equals the thickness of said phosphor powder layer, and said optical mirror slip is sealed in said phosphor powder layer in the said Baltimore groove fully.
6. fluorescence wheel system according to claim 4 is characterized in that, said Baltimore groove intermediate reach is equipped with the sub-optical mirror slip of several parabolic shape, and said sub-optical mirror slip is a microlens array structure.
7. fluorescence wheel system according to claim 1 is characterized in that, said substrate is the reflection-type substrate.
8. according to right 1 described fluorescence wheel system, it is characterized in that the focal length of the lens set that said optical alignment parts and said optical mirror slip are formed is less than 1 millimeter, the distance between said optical mirror slip and the said optical alignment parts is less than 1.5 millimeters.
9. a projector is characterized in that, comprises any described fluorescence wheel system of claim 1-7.
10. the method that the light collimation is assembled is characterized in that, comprising:
Optical alignment parts and optical mirror slip be the exciting light of converging parallel incident successively; Form incident light source; Said optical mirror slip is assemblied in the place ahead of said fluorescence wheel; And between said optical alignment parts and said phosphor powder layer, the focus of the lens set that said optical alignment parts and said optical mirror slip are formed is positioned on the phosphor powder layer;
Optical mirror slip is assembled and is excited the light that produces behind the said phosphor powder layer through said incident light source;
The optical alignment parts receive the light that sees through said optical mirror slip, and convert the said light that sees through said optical mirror slip into parallel emergent ray.
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| CN201210062256.6A CN102620244B (en) | 2012-03-09 | 2012-03-09 | Fluorescent wheel system, projector and light collimation and convergence method |
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| US10760743B2 (en) | 2017-06-14 | 2020-09-01 | Shanghai Blue Lake Lighting Tech. Co., Ltd. | Lamp |
| CN109375462A (en) * | 2018-10-15 | 2019-02-22 | 电子科技大学 | A kind of New Projection Display light-source structure of small size |
| CN115248527A (en) * | 2021-04-26 | 2022-10-28 | 成都极米科技股份有限公司 | Light source device and projection equipment |
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