Photographic control device
US4765716A · kind A · utility
1Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Aug 26, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/73
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic control device for scanner and exposure control system calibration in a photographic printer includes a carrier disk to present an open scan aperture in the scan gate for normal printer operation, and selectively a plurality of control patches in the scan gate for calibration of the scanner at startup. The disk is driven by a stepping motor and timing belt, the disk position being controlled by a position sensor tied in with the drive motor. The disk is mounted by three rotatable bearings spaced around its periphery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.