Apparatus for recording plural holographic images into a holographic recording material by temporal interleaving
US5098176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Jun 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A control arrangement for a galvanometer driven mirror whereby the angle of incidence of a beam on a holographic recording material is controlled includes a laser source and associated detector. The detector responds to a reflected position sensing beam incident thereon to generate electric currents. A ratio network forms the ratio of the sum and difference of the currents to generate an actual mirror position signal that is independent of the power output of the source of the sensing beam. An integrator is responsive to the error between the signal representative of the actual mirror position and a reference signal representative of a predetermined position of the mirror for forming a galvanometer position signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.