Wide spectral band infrared refractive lens
US4871219A · kind A · utility
13Cited by
3References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Jul 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/146
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosure relates to a wide spectral band objective refractive apochromatic lens system capable of operation with infrared light in the 3 to 12 micron range with good color correction simultaneously. The lens system includes three lenses, the first lens being positive and formed of Texas Instruments 1173 glass and the second and third lenses being negative and formed of germanium and zinc sulfide respectively. The germanium lens has a power approximately 0.44 that of the 1173 glass lens and the zinc sulfide lens has a power approximately 0.22 that of the 1173 glass lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.