Optical viewing device
US5900971A · kind A · utility
11Cited by
63References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1994 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Jun 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2469
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A low cost optical viewing device includes an objective lens section, a relay lens section and an eye piece section. The relay lens section is devoid of glass rods and includes a minimal number of lenses each preferably fabricated from plastic material. The illumination system includes a plurality of optical fibers also preferably fabricated from plastic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.