Motor-controlled lens system
US5029992A · kind A · utility
18Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1988 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jul 26, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stage light projector including an electronically controlled lens system capable of independently positioning two lenses of a triplet lens system to focus light from different selected back focal plane distances to project images having different selected sizes upon a screen or stage at a selected distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.