Structure of needle-type lens
US5179620A · kind A · utility
4Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1991 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Jun 13, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A needle type lens structure comprises, an inner tube having a relay lens inserted therein, an outer tube mounted around an outer periphery of the inner tube in concentric relation thereto with a predetermined gap, and light transmitting device, for guiding illumination light to the distal end of the needle type lens, provided axially between the inner tube and the outer tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.