Method for producing a hologram and a display device using the same
US6542265B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 20, 2002 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Feb 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio &eegr;R0/&eegr;00 of a first diffraction efficiency &eegr;00 and a second diffraction efficiency &eegr;R0, is calculated. The diffraction efficiency &eegr;00 is dependent on two object light beams. The efficiency &eegr;R0 is dependent on the object light and the reference light. In a second step, the intensity E0 of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio &eegr;R0/&eegr;00 is set to at least 10 and the efficiency &eegr;00 does not exceed 5%.A display device using the above hologram is structured by a display unit for generating a signal light; a hologram screen formed by either reflection or transmission hologram, and a projecting unit for projecting the signal light to the hologram screen.According to the present invention, it is possible to easily produce a hologram, for example, a screen h…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.