Negative abbe number radial gradient index relay and use of same
US5361166A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jan 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Radial gradient index of refraction (GRIN) optical relays are described for overcorrecting axial chromatic aberration. In particular, a relay including a negative dispersion radial GRIN rod alone or in combination with simple homogeneous or GRIN lenses is described for adjusting axial chromatic and monochromatic aberrations, including spherical, coma, astigmatism, and distortion. The invention also describes remote viewing scopes, such as endoscopes and borescopes, which utilize GRIN relays for achromatic, and reduced or corrected monochromatic aberration imaging The use of segmented GRIN relays provides a degree of flexibility in remote viewing scopes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.