Plastic optical transmission medium, process for producing the same and array of lenses using the same
US4799761A · kind A · utility
11Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Mar 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02038
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A plastic optical transmission element having a body in which the refractive index varies continuously in a radial direction from the interior toward the surface of the body, may be free from the troubles derived from irregularity of the index distribution and flare by having a layer containing a light-absorbing substance under the surface thereof. Such a layer may be formed by contacting an untreated element with a solvent containing the light absorbing substance, when the solvent is selected so as to be capable of at least partially dissolving the plastic of the element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.