Illumination optical system for endoscopes
US5485316A · kind A · utility
105Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1992 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Oct 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2469
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination optical system for endoscopes which comprises a lens component having at least one aspherical surface in a shape F(h) satisfying the condition mentioned below, and satisfies relationship of h=f.cndot..theta. or h=f.cndot.sin.theta.. This illumination optical system is capable of providing favorable luminance distributions on all planar surfaces, spherical surfaces and tubular surfaces. ##EQU1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.