Application of the Foucault knife-edge test to a segmented optic
US5020905A · kind A · utility
1Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Feb 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The Foucault knife-edge test has been traditionally employed for testing a monolithic imaging device, for example, a mirror, to ascertain its characteristics, for example, whether or not it is a source of optical aberrations. The present invention, in contrast to the traditional Foucault employment, discloses a Foucault testing of a segmented optic, thereby significantly extending the utility of the Foucault test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.