Method and apparatus for measuring a lens
US5351119A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1992 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Jun 16, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/0242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring an anamorphic lens includes a first step of converging a light beam emitted by a light source towards a reference standard and adjusting the reference standard along the travel direction of the light beam so that the light beam reflected by the reference standard forms a point spread function image or a line spread function image on a focal plane. A second step of replacing the reference standard with an anamorphic lends to be measured and adjusting the same so that the light beam reflected by the anamorphic lens forms a line spread function image on the focal plane, and a third step of measuring the anamorphic by comparing the first step with the second step are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.