Method and apparatus for printing monochromatic imaging using a spatial light modulator
US6552740B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Aug 1, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for monochromatic printing which records an image from digital image data onto a photosensitive medium (160) is disclosed. The apparatus includes the following: A light source (29) provides the monochromatic illumination. A uniformizer uniformizes a wavefront of light emitted from the light source (29). A polarizer (134) for filtering the uniformized light provides a polarized beam having a predetermined polarization state. A spatial light modulator (52) has a plurality of individual elements capable of altering the polarization state of the polarized beam to provide an exposure beam for printing. A state of each of the elements is controlled according to the digital image data. An optics assembly (11) is used for directing the polarized beam to the modulator and the exposure beam from the spatial light modulator (52). A lens assembly (132) is used for directing the exposure beam onto the photosensitive medium (160).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.