Dual band infrared lens assembly using diffractive optics
US6018414A · kind A · utility
19Cited by
55References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/193
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An infrared lens assembly (16, 60 and 80) operative in the near and far infrared wavebands to focus infrared radiation at an image plane (15) of an infrared detector (18). The infrared lens assembly (16, 60 and 80) includes a focusing component (33, 63 and 83), a collecting component (37, 65 and 85) and a diffracting component (41, 67 and 87). The focusing component (33, 63 and 83) and the collecting component (37, 65 and 85) may be formed from high dispersion, low index material. The diffracting component (41, 67 and 87) may be used to correct color aberrations associated with an infrared waveband.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.