Illumination optical system
US4953937A · kind A · utility
19Cited by
6References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | May 16, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0994
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination optical system consisting of a small number of lens components and having a very uniform light distribution characteristic wherein a light source having a two-dimensional extent, a positive lens system so arranged as to locate the front focal point thereof in the vicinity of the light source and having at least one aspherical surface, and a surface to be illuminated are arranged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.