Diffractive optical element, an optical system having a diffractive optical element, and a method for manufacturing a diffractive optical element
US5995286A · kind A · utility
11Cited by
3References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Mar 5, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1866
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system has a diffractive optical element. A diffractive optical surface of the optical element has a blaze-shaped diffraction grating. The grating heights are smaller in the peripheral region of the grating than in the central region of the grating around its optical axis. The optical element acts as a lenses a result of light rays being deflected by the light-diffracting action of the diffractive optical surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.