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Projection screen having image plane holographic structure

A holographic structure and projection screen technology, applied in optics, instruments, projection devices, etc., can solve the problems that observers cannot see objects behind the screen through the screen, image restoration is unnatural, and image contrast decreases, so as to prevent external Effects of light interference, overcoming light waste, high gain and contrast

Active Publication Date: 2007-09-12
SVG TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the principle of traditional optical diffuse reflection, the above projection screens are not transparent, and the observer cannot see the objects behind the screen through the screen; at the same time, in the process of image restoration, due to the large area of ​​light scattering, a large amount of light is wasted, making the image The contrast decreases, the image restoration is unnatural, and the image brightness decreases. In this case, to improve the contrast of the picture, only the light output of the projector can be improved, and the requirements for the projector will increase, and the cost will increase; and the projection quality is affected by the surrounding The effect of ambient brightness

Method used

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  • Projection screen having image plane holographic structure

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Embodiment 1

[0063] Referring to shown in accompanying drawing 3, the first step manufacturing system of the present embodiment comprises: laser 11, photographic shutter 12, beam splitter 13, plane mirror 141,142,143,144, spatial filter 15 comprises beam expander 151 And pinhole 152, speckle screen 16, lens 17 and first photoresist plate (H 1 )18.

[0064] As shown in FIG. 3 , the laser 11 emits a laser beam, which is divided into two paths by a beam splitter 13, one path obtains the object light of the speckle screen 16, and the other path obtains the lens 17 as a reference light, and the object light and the reference light are separated into one The included angle converges on the photoresist plate 18, and a spatial filter 15 is arranged in the optical path of the object light and the reference light. The spatial filter 15 includes a beam expander 151 and a pinhole 152, and the beam expander 151 is placed in the pinhole. 152, two spatial filters 15 respectively perform corresponding fi...

Embodiment 2

[0082] Shown in accompanying drawing 3 and accompanying drawing 5, the production system of the present embodiment comprises: laser 11, photographic shutter 12, beam splitter 13, plane mirror 141,142,143,144, spatial filter 15 comprises beam expander 151 and pinhole 152, speckle screen 16, lens 17, first photoresist plate (H 1 ) 18, laser 31, photographic shutter 32, beam splitter 33, plane reflector 341,342, and spatial filter 35 include beam expander 351 and pinhole 352, lens 361,362, H 1 37. Apertures 381, 382, ​​a photoresist plate 39, a driver 310 and a computer 311.

[0083] As shown in Figure 3, the laser 31 emits a laser beam, the laser beam is divided into two paths by a beam splitter 33, one path obtains the object light of the lens 362, and the other path obtains the lens 361 as a reference light, and the object light and the reference light form an angle Converging on the photoresist plate 39, a spatial filter 35 is arranged in the optical path of the object light...

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Abstract

The invention discloses a projection screen with image plane hologram structure, characterized in that: the main body of the projection screen is attached with image plane hologram information which is a speckle structure with extension trend in the vertical direction of the projection screen, and if defining the diameters of the structure of small diffraction particle composing the speckle are L and W in the vertical and horizontal directions respectively, 1.5W<=L<=10W. And the invention discloses a method for preparing the projection screen by two-step imaging method. And the projection screen has features of high brightness, high definition and transparency, applied to high-end consumer places and suitable for fashion-seeking persons to use as home theaters.

Description

technical field [0001] The invention relates to a component of a projection device, in particular to a projection screen with an image plane holographic structure and a manufacturing method thereof. Background technique [0002] In a projection system, the cooperation between the projection screen and the projector is a necessary condition for obtaining a good projection effect. [0003] Common projection screens currently on the market are: white plastic projection screens, glass bead projection screens and silver pearl projection screens. [0004] The white plastic projection screen belongs to the diffusion type. In theory, the display gain value (GS) of all directions is 1, but its actual value is close to 0.9. Due to the low gain, it is very sensitive to ambient light and should only be used in a dark room. [0005] The glass bead projection screen belongs to the regression type, and the reflective characteristics of this kind of projection scre...

Claims

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Application Information

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IPC IPC(8): G03B21/60G03H1/04
Inventor 吴智华周雷陈林森浦东林周小红魏国军谢正东
Owner SVG TECH GRP CO LTD