Achromatic lens for millimeter-wave and infrared bands
US6665116B1 · kind B1 · utility
12Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2000 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Oct 24, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a method for designing an achromatic lens and a lens according to the design. The invention provides a lens that makes use of the differences in the index of refraction of ZnSe and ZnS in the mm-wave and IR wavebands to minimize the differences in focal position between the two wavebands. This lens train can be used in conjunction with a dual-band focal plane array to simultaneously focus two wavebands on a common focal plane and thus provide for simultaneous imaging in both wavebands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.