Optical element and achromatic lens
US7700714B2 · kind B2 · utility
0Cited by
9References
11Claims
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Key dates
| Filing date | Nov 8, 2006 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Nov 8, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4272
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index nD and an Abbe number νD satisfies the following formula (I):nD+0.0076×νD≦1.78 (I)and that is used for correction of chromatic aberration, and an achromatic lens using the optical element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.