Optical cell control system
US5764402A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Oct 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13306
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A control system for an optical cell (light valve) is provided which comprises a first (oscillator) circuit supplied by a low voltage power source and including a primary winding of an induction coil and a secondary (resonant) circuit which includes the optical cell and a secondary winding of the induction coil. The secondary circuit includes the inductance of the secondary winding and the optical cell, and the induction coil provides a weak coupling between the primary and secondary windings. The resonant circuit provides a large over-voltage coefficient and great stability and the configuration made possible by the invention facilitates a significant reduction in the bulk of the control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.