Optical element
US9753299B2 · kind B2 · utility
1Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2014 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Oct 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0927
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element in which transmittance of light monotonically decreases from a center portion toward a peripheral portion, the optical element includes an absorbing material portion made of a material that absorbs a part of light and formed such that its thickness monotonically increases from the center portion toward the peripheral portion; and a transparent material portion made of a material that transmits light and is stacked on the absorbing material portion, a total thickness of the absorbing material portion and the transparent material portion being substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.