Device for separating a beam of white light into a plurality of elementary beams of particular color
US5118926A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Mar 23, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/735
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for separating a beam of white light (14,56 ) into a plurality of elementary beams of particular color, integrated in a chromatic analyzer for the printing of color photographs, comprising PA1 an optical sensor (15-17) PA1 a plurality of photosensitive sensors (24-26), each sensor making it possible: PA2 to collect the light (28,30,31) reflected by an optical system (21-23), PA2 then to convert the light signal so received into an electrical signal, PA2 and finally to amplify it (35-37); PA1 a unit (38,39) for processing the amplified electrical signals, wherein the optical system consists of a plurality of dichroic filters (21-23) of complementary color which are parallel and which are inclined relative to the optical axis (B) of the emerging beam (18), each filter making it possible to reflect the quantity of light corresponding to the color of this filter and to transmit the light in the other colors. The invention is used on installations for the printing of photographic proofs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.