Optical element, optical device provided therewith, and method for evaluating optical element
US6215596A · kind A · utility
14Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1999 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Sep 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0848
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element integrally has an optically acting surface, which is a rotationally asymmetric, aspherical surface, and a monitor surface for evaluation of whether the optical element is defective or not. The monitor surface is provided in a portion effecting no optical action, except for the optically acting surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.