Optical coupler with a housing permitting adjustment of the distance between the light source and the lens
US4295152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1979 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Jun 1, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/19107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In optical communication systems as well as in video disc playback equipment, it is necessary to position a light source such as a semiconductor laser at an exact distance from a lens of the optical system. In accordance with the invention this is done by mounting the laser in a tubular cover which is in a telescopic, press fit engagement with a holder provided with the lens. The desired exact distance between the laser and the lens is adjusted by relative compression between the cover and the holder. Because the engaging walls of the cover and holder are covered with a layer of indium, the walls will slide smoothly over each other during adjustment of the desired distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.