Lens testing apparatus and a lens adjusting apparatus
US5999251A · kind A · utility
8Cited by
9References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Feb 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/0221
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A lens testing apparatus detects and evaluates inclination of the image plane as caused by decentering of an optical system. The apparatus has an image provider, a plurality of focusing position detectors, and a calculator. The image provider provides an image to a lens system to be tested for decentering. The detectors detect a focusing position on which light rays exiting from the lens system focus. The calculator calculates inclination of the image plane based on the focusing position detected by the detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.