Beam projector
US4100404A · kind A · utility
8Cited by
3References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Jul 13, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G7/263
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A beam projector is provided by a plurality of coded reticles mounted on a spinning disc and illuminated by a laser source. In order to maintain a constant irradiance on a receiver variably located in space a pseudo-zoom assembly is provided including a moveable source and/or condenser optics. Also, plural focal length optics are employed to expand the range over which the constant irradiance is maintained beyond that realizable by the pseudo-zoom assembly itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.