Optical element and optical apparatus
US11656456B2 · kind B2 · utility
1Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2020 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Jun 2, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element including a glass body is provided. The optical element includes a colored layer provided inside the glass body and positioned outside an effective aperture of the optical element. Coloring of the colored layer is a reduction pigment occurring in a glass component of the glass body. The colored layer suppresses occurrence of stray light and obtains sufficient light-shielding properties, so that a superior image quality can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.