Photographic copying apparatus
US5661541A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Sep 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/462
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The photographic copying apparatus comprises a first exposure arrangement for exposure of photographic negative and positive copy masters and a second exposure arrangement for exposure of screen copy masters onto photographic copy material. The second exposure arrangement includes a cathode ray tube with control system. The cathode ray tube is arranged at approximately a right angle with respect to the exposure light path of the first exposure arrangement. The second exposure arrangement further comprises a color filter assembly, an objective and a mirror for directing the screen copy master emitted by the cathode ray tube to the photographic copy material. The color filter assembly, the objective and the mirror are combined as a structural unit to constitute an imaging optical system, which can be positioned into the exposure light path instead of an reproduction objective of the first exposure arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.