Photodetector for receiving an index signal of a beam-index cathode-ray tube
US4894531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1987 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Oct 13, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/89
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A photodetector including a planar light guide of a polygonal shape in which organic phosphor is dispersed in a transparent support material, and a pair of photoelectric conversion elements such that light having a wavelength range for exciting the organic phosphor is introduced into the light guide and light generated from the organic phosphor upon the excitation is guided to the photoelectric conversion elements sensitive to a wavelength of the light generated from the organic phosphor. The light guide is formed, at opposite end portions of its one side, with a pair of light emitting surfaces and the photoelectric conversion elements are, respectively, provided at the light emitting end surfaces such that a light receiving surface of each of the photoelectric conversion elements confronts each of the light emitting end surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.