Optical system and optical instrument with diffractive optical element
US6829091B2 · kind B2 · utility
6Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1999 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jul 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system for forming an image of an object. The optical system includes an optical element, which is deformed by the weight thereof, and at least one optical member for preventing a change in optical performance of the optical system due to deformation of the optical element, when the optical element is provided in the optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.