Diffractive optical element and optical instrument having the same
US6008942A · kind A · utility
12Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1997 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1866
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diffractive optical element for diffracting non-collimated light includes a base surface and a periodic structure formed on the base surface and having a plurality of diffractive surfaces and a plurality of boundary surfaces. The boundary surfaces are separated into plural zones, and in each zone, the boundary surface is placed substantially parallel to a main portion of a light beam impinging on that zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.