Optical element, image sensor including the optical element, and image pickup apparatus including the image sensor
US8847345B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2009 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Dec 8, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/008
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element includes a plurality of optical filters having different characteristics. The element includes a first optical filter including a first metal-structure group including first metal structures periodically arranged in an in-plane direction of a substrate surface and a second optical filter including a second metal-structure group including second metal structures periodically arranged in the in-plane direction, the second metal-structure group exhibiting a plasmon resonance condition different from that of the first metal-structure group. The optical distance between the first metal structures adjacent to each other is in a range of 0.75 to 1.25 times the optical distance between the second metal structures adjacent to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.