Method and apparatus for an integrating sphere lamphouse
US5392080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A real-time telecine system for converting motion picture film to high definition video contains a control unit comprising a database which provides complete control over all parameters associated with the film to high definition video conversion. The telecine system comprises a lamphouse which generates three monochromatic light sources wherein the light intensity for each light source is controlled independently by the control unit. Each light source contains a lamp, a variable power supply, a lens configuration and a light valve. Each lamp comprises a non-incandescent lamp such as xenon, and generates a collimated light beam. Each lens configuration contains a heat mirror, dichroic filters and a focusing lens. The dichroic filters for each light source generate a monochromatic light source by filtering the light beam. The focusing lens focuses the monochromatic light beam from each light source for input to an integrating sphere. The integrating sphere generates a polychromatic diffused light source for illuminating a film frame to generate an optical film image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.