CN2250532Y - Double layer dispersion transmission screen - Google Patents
Double layer dispersion transmission screen Download PDFInfo
- Publication number
- CN2250532Y CN2250532Y CN 95225385 CN95225385U CN2250532Y CN 2250532 Y CN2250532 Y CN 2250532Y CN 95225385 CN95225385 CN 95225385 CN 95225385 U CN95225385 U CN 95225385U CN 2250532 Y CN2250532 Y CN 2250532Y
- Authority
- CN
- China
- Prior art keywords
- disperse system
- refraction
- transmission screen
- utility
- matrix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a novel structure of a perspective screen, which is a transmission screen with a double-layer dispersion refraction layer. The both faces of basis material are respectively provided with a dispersion refraction layer, the middle of the basis material is a middle medium layer, and the dispersion refraction layer is composed of convex material particles of high refraction. The utility model has the advantages that the structure of the utility model adopts multiple refraction and half-naked refraction particles, so the relative refractivity is large, the intensity of each direction of scattering light is proximal, the scattering peak value is compressed, and the goal of eliminating vignetting and uniform frames is achieved; besides, the utility model has the advantages of simple process and structure, and convenient operation.
Description
The utility model relates to a kind of new structure of having an X-rayed screen, especially a kind of transmission screen that double-deck disperse system layer is arranged.
The effect of transmission screen is that imaging light is transmitted into screen, produces scattering by reflection or transmission method, and this scattering luminous energy observed person eyes receive, and are called imaging.The matrix sheet material of existing transmission screen generally is that the material by two kinds of different refractivities constitutes, or the refractive index of light is formed even disperse system by anisotropic material by a kind of its molecule, light scatter, its energy is pressed Gaussian curve and is distributed, and maximal value Gmax is in into X and penetrates light extended line direction, observer and projection objective on line, this line and screen intersection point place have high-high brightness, other position is gradually dark, is called primary optical axis directivity vignetting, is commonly called as solar effect.For solving the phenomenon of this brightness disproportionation, existing method is to add the Fei Nier lens that one deck is threaded the shape impression at the screen back side, make the optical axis of peak value Gmax because the Fei Nier lensing converges at the picture point of Fei Nier lens, approach to point to observer's direction, eliminate partly vignetting, uniform picture.This structural manufacturing process is complicated, and it is also not ideal enough to eliminate gradual halation phenomena.
The purpose of this utility model provides a kind of double-deck disperse system transmission screen, can improve transmission screen picture homogeneity, reduces vignetting, reduces optical energy loss simultaneously.
The purpose of this utility model is achieved in that double-deck disperse system transmission screen is made up of panel-shaped base body and disperse system refractor, the two sides of described matrix is respectively equipped with the disperse system refractor, the middle dielectric layer that matrix utilizes transparent material to make, it can be substratum transparent or various hyaline membrane, and the thickness of this matrix should be less than the depth of field of putting image device accordingly.The disperse system refractor is made of the high-index material particle of projection, the refractive index of this particle should be obviously greater than the refractive index of described middle dielectric layer, be attached to this high-refraction material uniform particles the surface of middle dielectric layer, and half-naked outside described middle dielectric layer.
Advantage of the present utility model is that relative index of refraction has higher value, makes scattered light all directions intensity approaching because this structure adopts repeatedly refraction and half-naked refraction particle, compressed the scattering peak value, reached the elimination vignetting, the purpose of uniform picture, this structural manufacturing process is simple, easy to operate simultaneously.
Below in conjunction with drawings and Examples the utility model is further described.
Accompanying drawing is the structural representation of the utility model embodiment.
The matrix 1 of present embodiment is a glue-line, and the high-refraction material particle 2 that is provided with projection in the both sides of matrix 1 constitutes the disperse system refractor, and the interlayer spacing distance promptly is the thickness of matrix, and the thickness of matrix is 1mm in this example.High-refraction material particle 2 semi-nudities in the described disperse system refractor are outside matrix 1.The relative index of refraction of half-naked disperse system structure is closed in relative index of refraction in the medium greater than particle.Can be covered with transparent dielectric layer 3 on the outside surface of the high-refraction material particle in this routine described disperse system refractor, the refractive index of this transparent dielectric layer 3 should be significantly less than the refractive index of matrix 1.
Claims (4)
1, a kind of double-deck disperse system transmission screen, it is characterized in that mainly forming by panel-shaped base body (1) and disperse system refractor, the two sides of described matrix (1) is respectively equipped with the disperse system refractor, matrix (1) is to utilize transparent material to make, the disperse system refractor is made of the high-index material particle (2) of projection, the refractive index of this particle (2) should be obviously greater than the refractive index of described matrix (1), this high-refraction material particle (2) is attached to the surface of matrix (1) equably, and half-naked outside described matrix (1).
2, double-deck disperse system transmission screen as claimed in claim 1 is characterized in that described matrix (1) is a substratum transparent.
3, double-deck disperse system transmission screen as claimed in claim 1 is characterized in that described matrix (1) is a hyaline membrane.
4, double-deck disperse system transmission screen as claimed in claim 1, the outside that it is characterized in that described each disperse system refractor is with transparent transparent dielectric layer (3), and the refractive index of this transparent dielectric layer (3) is significantly less than the refractive index of described matrix (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95225385 CN2250532Y (en) | 1995-11-24 | 1995-11-24 | Double layer dispersion transmission screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95225385 CN2250532Y (en) | 1995-11-24 | 1995-11-24 | Double layer dispersion transmission screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2250532Y true CN2250532Y (en) | 1997-03-26 |
Family
ID=33871864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95225385 Expired - Fee Related CN2250532Y (en) | 1995-11-24 | 1995-11-24 | Double layer dispersion transmission screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2250532Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399190C (en) * | 1999-08-26 | 2008-07-02 | 可乐丽股份有限公司 | Plastic board for back projection type screen |
-
1995
- 1995-11-24 CN CN 95225385 patent/CN2250532Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399190C (en) * | 1999-08-26 | 2008-07-02 | 可乐丽股份有限公司 | Plastic board for back projection type screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |