CN100474101C - Projection screen having image plane holographic structure - Google Patents
Projection screen having image plane holographic structure Download PDFInfo
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- CN100474101C CN100474101C CN 200710039274 CN200710039274A CN100474101C CN 100474101 C CN100474101 C CN 100474101C CN 200710039274 CN200710039274 CN 200710039274 CN 200710039274 A CN200710039274 A CN 200710039274A CN 100474101 C CN100474101 C CN 100474101C
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Abstract
本发明公开了一种具有像面全息结构的投影屏，其特征在于：在投影屏幕主体上附着有像面全息信息，所述像面全息信息为在投影屏幕的竖直方向上带有延展趋势的散斑结构，定义组成散斑的微小衍射颗粒结构在竖直方向为长径L，在水平方向为短径W，则1.5W≤L≤10W。本发明同时公开了采用二步成像法制备所述投影屏的方法。本发明的投影屏具有高亮、清晰及透明的特点，对环境的要求不高，适合高端的消费场所使用；也适合追求时尚的人士做家庭影院使用。
The invention discloses a projection screen with an image plane holographic structure, which is characterized in that image plane holographic information is attached to the main body of the projection screen, and the image plane holographic information has an extension tendency in the vertical direction of the projection screen The speckle structure of the speckle defines that the micro-diffraction particle structure that makes up the speckle is the long axis L in the vertical direction, and the short axis W in the horizontal direction, then 1.5W≤L≤10W. The invention also discloses a method for preparing the projection screen by adopting a two-step imaging method. The projection screen of the present invention has the characteristics of high brightness, clarity and transparency, has low requirements on the environment, and is suitable for use in high-end consumer places; it is also suitable for people who pursue fashion to use as a home theater.
Description
Technical field
The present invention relates to a kind of parts of projection arrangement, be specifically related to a kind of projection screen and manufacture method thereof with image plane holographic structure.
Background technology
In optical projection system, projection screen is the necessary condition that obtains good drop shadow effect with cooperating of projector.
Common in the market projection screen has: mould cloth projection screen, beaded glass projection screen and silver color pearl projection screen in vain.
Mould the cloth projection screen in vain and belong to diffused, in theory, the display screen yield value (GS) of all directions all is 1, but its actual value approaches 0.9.Because gain is low, very responsive to ambient light, can only in the darkroom, use.
The beaded glass projection screen belongs to the recurrence type, the optical characteristics of the somewhat similar reflector marker of reflection characteristic of this projection screen.When ray cast was on beaded glass, light can return by nature, and in brief, maximum radiant intensity turns back to light source, just projector.Such projection screen, gain (GS) is about 1.5 to 3.
Silver color pearl projection screen belongs to reflection-type, and such projection screen can provide maximum radiant intensity, just as specularly reflected light.The gain of projection screen and diffusion are synergistic, if the diffusion deficiency of light just can obtain higher projection screen yield value, but are prone to tangible speck.The gain margin of silver color pearl projection screen is wider, and from 1.5 to 10.This projection screen brightness is very high, but yield value is high more, and the cost of bringing is that the visual angle is narrow more.
Because based on traditional optical diffuse reflection principle, above-mentioned several projection screens are all opaque, the observer can't see through the object after screen is seen screen; Simultaneously, in the image restoring process, because the scattering of light large tracts of land causes a large amount of light wastes, and picture contrast is descended, image restoring is nature not, brightness of image reduces, and will improve the contrast of picture in this case, can only improve the light output of projector, requirement to projector will improve, and cost will increase; And projection quality is subjected to the influence of surrounding enviroment brightness.
Summary of the invention
The object of the invention provides a kind of projection screen with characteristics such as transparency, high-resolution, anti-high lights, and by the useless visual angle of compression, improves the utilization factor of projection ray.
For achieving the above object, the technical solution used in the present invention is: a kind of projection screen with image plane holographic structure, on the projection screen main body, be attached with image plane holographic information, described image plane holographic information is for having the speckle structure of extension trend on the vertical direction of projection screen, the small diffraction grain pattern that speckle is formed in definition is major diameter L at vertical direction, be minor axis W, then 1.5W≤L≤10W in the horizontal direction.
In the technique scheme, the speckle structure that constitutes described image plane holographic information is made of the speckle array of structures that is uniformly distributed on the projection screen, and each pixel in the described array is the speckle structure that has extension trend on the described vertical direction.
Improve the brightness of projection screen, and make it less demanding to environment for use, the technical program adopts in the vertical direction to have the diffusing class screen of certain trend to make the projection screen of its making to light certain compression be arranged at vertical direction.
According to shown in Figure 1, if projection screen vertically is divided into the big pixel groups of 2n piece, the incident angle of projection screen i piece is θ
iCan obtain according to following equation:
tanθ
i＝((i-n)*l+L/tan(β))/L
According to θ
iThe angle, we can draw and make in the light path, and incident angle is reproduced the angle at angle.
For its suitable industrialization is made, as shown in Figure 2, each block of pixels that whole projection screen is divided into adopts identical optimum reproducing optic angle degree.Its drop shadow effect was best when the irradiating angle of the projector optimum reproducing optic angle that meets each block of pixels was spent in theory, and in actual fabrication, it is thin holographic that projection screen belongs to, to the selectivity of angle is not responsive especially, and influence is not very big to whole structure so the irradiating angle of projector is not in full conformity with the optimum reproducing optic angle degree of each block of pixels.
Above-mentioned method for making with projection screen of image plane holographic structure comprises the steps:
(1) adopt two step shooting methods on photoresist sheet, to write down the information of image plane holographic;
The first step: laser instrument sends laser beam and is divided into two-way by beam splitter, and one the tunnel as thing light, and another road is as reference light, and thing light process speckle screen and reference light converge with penetrating on photoresist sheet and expose, and obtain first photoresist sheet;
Second step: laser instrument sends laser beam, laser beam is divided into two-way by beam splitter, one tunnel playback light as first photoresist sheet, another road is as reference light, penetrate in photoresist sheet exposure acquisition second photoresist sheet from diffraction light and reference light remittance that first photoresist sheet produces, thing light in the playback light and first photoresist sheet is conjugate beam each other, and the picture of first photoresist sheet becomes the position that photoresist sheet is put in second step;
(2) second photoresist sheet after the exposure is developed, electroforming, layout, acquisition has the mother matrix of image plane holographic structure;
(3) template that obtains with step (2) is suppressed the projection screen that obtains to have image plane holographic structure on thermoplastic material or film.
In the technique scheme, described " suppressing on thermoplastic material or film " can adopt the micro-nano imprint technology or adopt accurate film molding apparatus to realize.Thermoplastic material or film are that transparent or semitransparent material can be selected Polyvinylchloride, polycarbonate, Biaxially oriented polypropylene or transparent polyester film etc. for use.
Further technical scheme is coated with the protective seam of transparent or semitransparent medium on the projection screen surface that obtains, can be single-face plating, also can be two-sided coating.
In the technique scheme,, in thing light and reference light light path, spatial filter is set respectively, thing light and reference light are carried out Filtering Processing in the first step of step (1) with in second step.Described spatial filter comprises beam expanding lens and pin hole, and described beam expanding lens places the front end of pin hole.
Adopt the projection screen manufacturing system with image plane holographic structure of said method, comprise laser instrument, shutter, beam splitter, lens, speckle screen and photoresist sheet at least.Wherein, laser beam is divided into two-way by beam splitter described in the first step, and one the tunnel obtains the thing light of lens, and another road is as reference light, and described thing light and reference light converge with an angle to be penetrated on first photoresist sheet; Described shutter places the laser beam front end.Laser beam is divided into two-way by beam splitter described in second step, and one the tunnel is playback light, and another road is as reference light, and the diffraction light of described first photoresist sheet and reference light converge with an angle to be penetrated on second photoresist sheet; Described shutter places the laser beam front end.
This system also comprises four spatial filters, wherein two spatial filters place the light path of first step thing light and reference light respectively, thing light and reference light are carried out corresponding Filtering Processing, other is the light path that two spatial filters place the second step playback light and reference light respectively, and playback light and reference light are carried out corresponding Filtering Processing.Described spatial filter comprises beam expanding lens and pin hole, and described beam expanding lens places the front end of pin hole.
A kind of change example of above-mentioned method for making is to adopt following steps:
1) adopt holographic shooting method on photoresist sheet, to write down the picture information of speckle screen.
2) adopt automatic control laser hologram etching system on photoresist sheet, to write down the array of image plane holographic structure.
3) photoresist sheet after the exposure is developed, electroforming, layout produce image plane holographic structure array mother matrix.
4) adopt micro-nano imprint technology or adopt the manufacturing of accurate film molding apparatus to have the diffraction projecting screen of image plane holographic structure.
Described step 1) comprises the steps:
Laser instrument sends laser beam, and laser beam is divided into two-way by beam splitter, and one the tunnel as thing light, and another road is as reference light, and thing light and reference light being penetrated to expose on photoresist sheet with angle remittance and being designated as H1.
Described step 2) comprises the steps:
21) laser instrument sends laser beam, and laser beam is divided into two-way by beam splitter, and one the tunnel as thing light, and another road is as reference light, and thing light and reference light converge with penetrating on photoresist sheet with an angle and expose.
22) computing machine makes the switching of shutter and the mobile phase harmony of photoresist sheet by the switching of driver control shutter and moving of photoresist sheet.On photoresist sheet, write down the information of image plane holographic array equably, in the present invention, computing machine can be by laser hologram etching system control time shutter, exposure etc., and simultaneous computer makes photoresist sheet accurately moving in x direction and y direction by the displacement of driver control two-dimensional stage.
In the described step 4), described thermoplastic material or film are transparent or semitransparent material.Described thermoplastic material can be Polyvinylchloride, polycarbonate or Biaxially oriented polypropylene etc.Described film can adopt transparent polyester film.
Also comprise the steps 5 after the described step 4)) plating on the holographic cylindrical lens array structure layer matrix after the mold pressing.
In the described step 5), described protective seam is transparent or semitransparent medium protective layer.
Its manufacturing system comprises computing machine, laser instrument, phase shutter, beam splitter, lens, bar shaped speckle screen, diaphragm, three-dimensional platform, driver and photoresist sheet at least, wherein, the first step, laser instrument sends laser beam, laser beam is divided into two-way by beam splitter, one the tunnel as thing light, and another road is as reference light, and thing light and reference light being penetrated to expose on photoresist sheet with angle remittance and being designated as H
1Described laser instrument of second step sends laser beam and is divided into two-way by beam splitter, and one the tunnel obtains the thing light of lens, and another road is as reference light, and described thing light and reference light converge with an angle to be penetrated on photoresist sheet; Described shutter places the laser beam front end, control thing light and the exposure of reference light on photoresist sheet; Moving of the switching of described computer control shutter, exposure and photoresist sheet makes the switching of shutter and the mobile phase harmony of photoresist sheet.
This system also comprises four spatial filters, and described four spatial filters place the light path of thing light and reference light respectively, and thing light and reference light are carried out corresponding Filtering Processing.Described spatial filter comprises beam expanding lens and pin hole, and described beam expanding lens places the front end of pin hole.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. projection screen of the present invention can compress the visual angle of vertical direction owing to adopted the speckle structure with vertical direction trend on the screen main body, thereby improves the utilization factor of light, at direction of observation brightness of image height, has overcome unnecessary light waste.
2. because the speckle image plane holographic structure needs relatively stricter reproducing condition; surround lighting does not satisfy reproducing condition; therefore; projection screen of the present invention can obtain higher gain and contrast under the ordinary ray environment; both prevented that extraneous light from disturbing; from ergonomics and Human physiology, also more help protecting observer's eyesight.
3. owing to adopted the speckle structure, the projection screen of acquisition has achromatic effect, can realize the reproduction of image preferably.
4. projection screen of the present invention is owing to have highlighted, clear and transparent characteristics, not high to environment requirement, be fit to high-end consumption place, as: the pulpit of government bodies and competent authorities, enterprises and institutions' institutional purchase, meeting room, business intelligence (consulting) center, rear-projection case and video wall, audio-visual education room; Saloon, the shopping mall in field showed in commercial advertisement; Decorate famous-object shop, brand shop, automobile 4S shop, Window Display, wedding photo, office block and hotel lobby, the dining room of laying equal stress on displaying; Airport, station, bank and other stream of peoples be the product, the bulletin of business information etc. of the point of sale of section thick and fast; The personage who also is fit to follow the fashion makees home theater and uses.
Description of drawings
The synoptic diagram of accompanying drawing 2 same pixel groups projection screen for the present invention makes;
Accompanying drawing 3 is the embodiment of the invention one a manufacturing system first step optical texture synoptic diagram;
Accompanying drawing 4 is embodiment one manufacturing system second step optical texture synoptic diagram;
Accompanying drawing 5 is the manufacturing system optical texture synoptic diagram among the embodiment two;
Accompanying drawing 6 is the making schematic flow sheet of embodiment one;
Accompanying drawing 7 is the concrete making schematic flow sheet on the thermal plastic material among the embodiment one;
Accompanying drawing 8 is the concrete making schematic flow sheet on film among the embodiment one;
Accompanying drawing 9 is image plane holographic array arrangement synoptic diagram of the present invention;
Accompanying drawing 10 is (octagon) shape synoptic diagram of image plane holographic array of the present invention in the screen body;
Accompanying drawing 11 is (regular hexagon) shape synoptic diagram of image plane holographic array of the present invention in the screen body;
Accompanying drawing 12 is (circle) shape synoptic diagram of image plane holographic array of the present invention in the screen body;
Accompanying drawing 13 is the impression mode synoptic diagram of volume to volume among the embodiment one;
Accompanying drawing 14 is used example schematic diagram for the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one:
Shown in accompanying drawing 3, the first step manufacturing system of present embodiment comprises: laser instrument 11, shutter 12, beam splitter 13, plane mirror 141,142,143,144, spatial filter 15 comprise beam expanding lens 151 and pin hole 152, speckle screen 16, lens 17 and the first photoresist sheet (H
1) 18.
As shown in Figure 3, laser instrument 11 sends laser beam, laser beam is divided into two-way by beam splitter 13, one the tunnel obtains the thing light of speckle screen 16, another road obtains lens 17 conducts with reference to light, thing light and reference light converge with an angle to be penetrated on photoresist sheet 18, spatial filter 15 all is set in the light path of thing light and reference light, spatial filter 15 comprises beam expanding lens 151 and pin hole 152, beam expanding lens 151 places the front end of pin hole 152, and two spatial filters 15 carry out corresponding Filtering Processing to thing light and reference light respectively.
Wherein, thing light light path is as follows:
Laser instrument 11 → shutter 12 → beam splitter 13 → plane mirror 142 → plane mirror 143 → spatial filter 152 → speckle screen 16 → photoresist sheet 18
The reference light light path is as follows:
Laser instrument 11 → shutter 12 → beam splitter 13 → plane mirror 141 → plane mirror 144 → spatial filter 151 → lens 17 → photoresist sheet 18
Shown in accompanying drawing 4, the second step manufacturing system of present embodiment comprises: laser instrument 21, shutter 22, plane mirror 231,232,233, beam splitter 24, spatial filter 25 comprise beam expanding lens 251 and pin hole 252, lens 26, the first photoresist sheet (H
1) the 18 and second photoresist sheet (H
2) 27.
As shown in Figure 4, laser instrument 21 sends laser beam, and laser beam is divided into two-way by beam splitter 24, and one the tunnel obtains lens 26 as H
1Playback light, another road is as reference light, H
1Diffraction light and reference light converge with an angle and penetrate on second photoresist sheet 27, spatial filter 25 all is set in the light path of playback light and reference light, spatial filter 25 comprises beam expanding lens 251 and pin hole 252, beam expanding lens 251 places the front end of pin hole 252, and two spatial filters 25 carry out corresponding Filtering Processing to thing light and reference light respectively.H wherein
1The position of the picture that reproduces is at photoresist sheet H
2On the face, the requirement of satisfying image plane holographic has reached achromatic purpose.
The playback light light path is as follows:
The reference light light path is as follows:
The concrete flow process of making is as follows:
1, laser instrument 11 sends laser beam, and laser beam is divided into two-way by beam splitter 13, and one the tunnel obtains the thing light of speckle screen 16, and another road obtains lens 17 conducts with reference to light, and thing light and reference light converge with an angle penetrates exposure on photoresist sheet 18.
2, laser instrument 21 sends laser beam, and laser beam is divided into two-way by beam splitter 24, and one the tunnel obtains lens 26 as H
1Playback light, another road is as reference light, H
1Diffraction light and reference light converge with an angle and penetrate exposure on photoresist sheet 27.
3, adopt LIGA (photoetching-electroforming) technology usually, being convenient to motherboard duplicates, concrete technological process is earlier the photoresist relief surface to be carried out metalized, the production electrode, place electrotyping bath then, on photoresist, be deposited as certain thickness metallic nickel version with the electroforming mode, separate, formed embossment structure on the metal nickel plate with photoresist, form the metallic nickel mother matrix, again with the mother matrix working metal version of casting.
4, adopt micro-nano imprint technology or adopt the manufacturing of accurate film molding apparatus to have the projection screen of image plane holographic structure.Adopt the micro-nano imprint technology can utilize the transparent thermoplastic material, for example Polyvinylchloride (PVC:PolyrinylChloride), polycarbonate (PC:Polycarbonate) or Biaxially oriented polypropylene (BOPP:BiaxialOr1entedPlypropylene) etc. are shown in accompanying drawing 7.Adopt the manufacturing of accurate film molding apparatus can adopt transparent polyester (PET:Polyester) or BOPP film, shown in accompanying drawing 8.Wherein in actual production technology, the plane working version can be wrapped on the mold pressing cylinder, PET or BOPP be carried out the continuous rolling moulding replication, as shown in Figure 13.
5, plating on the projection screen with image plane holographic structure of the thermoplastic material after the mold pressing, protective seam can adopt transparent or semitransparent medium protective layer, as zinc sulphide ZnS or silicon dioxide SiO
2Deng.
Embodiment two:
With reference to the accompanying drawings 3 and accompanying drawing 5 shown in, the manufacturing system of present embodiment comprises: laser instrument 11, shutter 12, beam splitter 13, plane mirror 141,142,143,144, spatial filter 15 comprise beam expanding lens 151 and pin hole 152, speckle screen 16, lens 17, the first photoresist sheet (H
1) 18, laser instrument 31, shutter 32, beam splitter 33, plane mirror 341,342,, spatial filter 35 comprises beam expanding lens 351 and pin hole 352, lens 361,362, H
137, diaphragm 381,382, photoresist sheet 39, driver 310 and computing machine 311.
As shown in Figure 3, laser instrument 31 sends laser beam, laser beam is divided into two-way by beam splitter 33, one the tunnel obtains the thing light of lens 362, another road obtains lens 361 conducts with reference to light, thing light and reference light converge with an angle to be penetrated on photoresist sheet 39, spatial filter 35 all is set in the light path of thing light and reference light, spatial filter 35 comprises beam expanding lens 351 and pin hole 352, beam expanding lens 351 places the front end of pin hole 352, two spatial filters 35 carry out corresponding Filtering Processing to thing light and reference light respectively, diaphragm 381 are set all in the light path of thing light and reference light and 382, two diaphragms carry out the restriction of corresponding light beam to thing light and reference light respectively.Wherein second the step in H
1Playback light be the conjugate beam of thing light in the first step, the position of second middle photoresist sheet is at H
1The position of picture.
As shown in Figure 5, shutter 32 places the laser beam front end, control thing light and the exposure of reference light on photoresist sheet 39, computing machine 311 is by switching, the exposure of driver control shutter 2, with moving of photoresist sheet 39, make the switching of shutter 2 and the mobile phase harmony of photoresist sheet 39.
As shown in Figure 5, thing light light path is as follows:
The reference light light path is as follows:
As Fig. 3 and shown in Figure 5, it is as follows to make flow process substantially:
1) adopt holographic shooting method on photoresist sheet, to write down the picture information of speckle screen.
2) adopt automatic control laser hologram etching system on photoresist sheet, to write down the array of image plane holographic structure.
3) photoresist sheet after the exposure is developed, electroforming, layout produce image plane holographic structure array mother matrix.
4) adopt micro-nano imprint technology or adopt the manufacturing of accurate film molding apparatus to have the diffraction projecting screen of image plane holographic structure.
As Fig. 3, Fig. 5, Fig. 6 and shown in Figure 7, it is as follows specifically to make flow process:
1, laser instrument 11 sends laser beam, and laser beam is divided into two-way by beam splitter 13, and one the tunnel obtains the thing light of speckle screen 16, and another road obtains lens 17 conducts with reference to light, and thing light and reference light converge with an angle penetrates exposure on photoresist sheet 18.
2, laser instrument 31 sends laser beam, and laser beam is divided into two-way by beam splitter 33, and one the tunnel obtains the thing light of lens 362, and another road obtains lens 361 conducts with reference to light, and thing light and reference light converge with an angle penetrates exposure on photoresist sheet 39.
3, computing machine 311 makes the switching of shutter 32 and the mobile phase harmony of photoresist sheet 39 by the switching of driver control shutter 32 and moving of photoresist sheet 39.On photoresist sheet 39, write down the information of image plane holographic array equably, in the present invention, computing machine 311 can be by laser hologram etching system control time shutter, exposure etc., simultaneously, computing machine 12 makes photoresist sheet 10 accurately moving in x direction and y direction by the displacement of driver control two-dimensional stage.
4, the laser hologram lithographic procedures by spontaneous research and development makes at every turn after a position exposure, computing machine 12 is controlled photoresist sheet 10 by the displacement of driver control two-dimensional stage and is moved to next position, expose again, so circulation, on photoresist sheet 10, write down the image plane holographic array equably, form form as shown in Figure 7.
5, the photoresist sheet after the exposure is developed, large format holographic cylindrical lens array motherboard is made in electroforming, layout.
6, adopt micro-nano imprint technology or adopt the manufacturing of accurate film molding apparatus to have the projection screen of image plane holographic structure.Adopt the micro-nano imprint technology can utilize the transparent thermoplastic material, for example Polyvinylchloride (PVC:PolyrinylChloride), polycarbonate (PC:Polycarbonate) or Biaxially oriented polypropylene (BOPP:BiaxialOr1entedPlypropylene) etc.Adopt the manufacturing of accurate film molding apparatus can adopt transparent polyester (PET:Polyester) or BOPP film.Wherein in actual production technology, the plane working version is wrapped on the mold pressing cylinder, PET or BOPP are carried out the continuous rolling moulding replication.As Figure 13
7, plating on the holographic cylindrical lens array of the thermoplastic material after the mold pressing, protective seam can adopt transparent or semitransparent medium protective layer, as zinc sulphide ZnS or silicon dioxide SiO
2Deng, also can adopt metallic reflective material protective seam (as aluminize, copper etc.), obtain at last as shown in Figure 8, with the thermoplastic material screen body of the low material of base, set up the holographic cylindrical lens array information on this screen body.
In the present invention, as shown in Figure 9, the image plane holographic array is evenly arranged on the screen body, and be arranged on the screen body with abutment, only need be in step 2 and step 3, make the displacement of computing machine 311 by the driver control two-dimensional stage make photoresist sheet 39 x direction and y direction accurately move and the switching of shutter 32 mutually harmony get final product.Holographic cylindrical lens among Fig. 7 is shaped as square in the screen body, the present invention can be by selecting diaphragm 381 and 382 the incoming cross-section shape to obtain corresponding shape, diaphragm 381 and 92 incoming cross-section shape adopt circular, then the image plane holographic array is shaped as circle in the screen body, Fig. 9 and shown in Figure 11, the shape of image plane holographic array in the screen body is respectively square and regular hexagon, with respect to circular or oval, square and regular hexagon can be obtained higher dutycycle, for the selection of dutycycle, can choose according to the needs of practical application.
Of the present invention one typical application mode as shown in figure 14, for adopting transparent or semitransparent screen body, with the screen body is the boundary, side with respect to the observation place, lay specific material object at the opposite side of screen body, so no matter to be to use front projection machine or rear projector, when seeing projected picture from the observation place, always can see the material object of screen body back, the light of the projection light source of projector but can directly not enter human eye influences observing effect, this is the not available characteristic of other projection screen, the existence of angle between direction of observation among the present invention and the projecting direction, make and see that the material object of screen body back becomes a kind of reality when seeing projected picture, novel observing effect, angle by the controlled observation direction, become image (picture) can make the people feel to float in the air, to the observer brought one fresh, and impression with impulsive force.
Claims (6)
1. projection screen with image plane holographic structure, it is characterized in that: on the projection screen main body, be attached with image plane holographic information, described image plane holographic information is the speckle structure, the small diffraction grain pattern that is of forming described speckle structure, this small diffraction grain pattern is major diameter L at vertical direction, be minor axis W in the horizontal direction, 1.5W≤L≤10W.
2. the projection screen with image plane holographic structure according to claim 1, it is characterized in that: the speckle structure that constitutes described image plane holographic information is made of the speckle array of structures that is uniformly distributed on the projection screen, it is major diameter that each pixel in the described array is described vertical direction, and horizontal direction is the speckle structure of minor axis.
3. the described method for making with projection screen of image plane holographic structure of claim 1 comprises the steps:
(1) adopt two step shooting methods on photoresist sheet, to write down the information of image plane holographic;
The first step: laser instrument sends laser beam and is divided into two-way by beam splitter, and one the tunnel as thing light, and another road is as first reference light, and the thing light process speckle screen and first reference light converge with penetrating on photoresist sheet and expose, and obtain first photoresist sheet;
Second step: laser instrument sends laser beam, laser beam is divided into two-way by beam splitter, one tunnel playback light as first photoresist sheet, another road is as second reference light, penetrate in photoresist sheet exposure acquisition second photoresist sheet from diffraction light and the remittance of second reference light that first photoresist sheet produces, thing light in the playback light and first photoresist sheet is conjugate beam each other, and the picture of first photoresist sheet becomes the position that photoresist sheet is put in second step;
(2) to second photoresist sheet after the exposure develop, electroforming, layout, obtain to have the mother matrix of image plane holographic structure;
(3) mother matrix that obtains with step (2) is suppressed the projection screen that obtains to have image plane holographic structure on thermoplastic material or film.
4. the method for making with projection screen of image plane holographic structure according to claim 3 is characterized in that: in step (3) afterwards, further be coated with the protective seam of transparent or semitransparent medium on the projection screen surface that obtains.
5. the method for making with projection screen of image plane holographic structure according to claim 3, it is characterized in that: in the first step of step (1), in the thing light and the first reference light light path, spatial filter is set respectively, the thing light and first reference light are carried out Filtering Processing; In second step of step (1), in the playback light and the second reference light light path, spatial filter is set respectively, the playback light and second reference light are carried out Filtering Processing.
6. the method for making with projection screen of image plane holographic structure according to claim 5 is characterized in that: described spatial filter comprises beam expanding lens and pin hole, and described beam expanding lens places the front end of pin hole.
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| CN 200710039274 CN100474101C (en) | 2007-04-10 | 2007-04-10 | Projection screen having image plane holographic structure |
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| CA2932387C (en) * | 2011-11-04 | 2018-10-02 | Intel Corporation | Coordination of self-optimization operations in a self organizing network |
| CN103488035B (en) * | 2013-08-30 | 2015-08-19 | 浙江大学 | A kind of holographic directional scatter screen and preparation method thereof and device |
| CN107085220B (en) * | 2017-06-21 | 2023-09-22 | 中国工程物理研究院流体物理研究所 | Trillion amplitude frequency full-light framing three-dimensional holographic imaging device and method |
| CN108628077A (en) * | 2018-01-31 | 2018-10-09 | 陈念 | Scatter projection device |
| CN110320738A (en) * | 2019-04-18 | 2019-10-11 | 周扬斌 | The production method of transparent projection film, projection screen, optical projection system and transparent projection film |
| CN110109320A (en) * | 2019-05-09 | 2019-08-09 | 深圳市深大极光科技有限公司 | A kind of production method and producing device of hololens projection screen |
| CN111366096B (en) * | 2020-03-09 | 2021-09-14 | 北京印刷学院 | Method for measuring groove depth of holographic master plate |
| CN112987476B (en) * | 2021-03-08 | 2022-07-29 | 中国科学院重庆绿色智能技术研究院 | A holographic speckle screen for projection display system |
| CN113204185A (en) * | 2021-05-10 | 2021-08-03 | 厦门大学 | Preparation method of holographic display element for holographic automobile tail lamp |
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