Patent · US Expired

Method and apparatus for modulating unpolarized light

US6618183B2 · kind B2 · utility

0Cited by

12References

18Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Joerg Fischer · Laboe, DE
Axel Gebhardt · Kiel, DE
Peter Ressel · Berlin, DE

Key dates

Filing date	Oct 30, 2001
Grant date	Sep 9, 2003
Priority date	—
Expiry date	Oct 30, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/48
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The method and apparatus for amplitude modulation of unpolarized light by at least one Bragg modulator on the basis of domain-invertible material, the unpolarized light is modulated by a first Bragg modulator both for defining a polarization plane in the unpolarized light and for modulating a light part to be allocated to the polarization plane. A second Bragg modulator is provided which modulates the light part of the unpolarized light allocated to the polarization plane orthogonal to the polarization plane of the first Bragg modulator. The method and apparatus are particularly useful for recording a product to be printed, such as for manufacturing printing forms.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.