Optical element and imaging apparatus
US9778401B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Mar 17, 2015 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Dec 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/806
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element in which light with a large principal ray input angle is gradually input from a center to a peripheral portion, a thickness gradually increases from the center to the peripheral portion, and 1<RD≦1.085 is satisfied, when an increase ratio of a thickness to the center at an outermost peripheral portion to which light of which the principal ray input angle is maximum is input is set to RD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.