Apparatus useful for positioning a light filter
US4419575A · kind A · utility
14Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Jun 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus useful for positioning a light filter includes an incrementally stepped motor having the light filter affixed thereto. The apparatus also includes means for detecting a light signal and incrementing the motor in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.