Autocollimation method and apparatus
US4653911A · kind A · utility
Inventor
Key dates
| Filing date | Dec 15, 1983 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Dec 15, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An autocollimation method and apparatus are disclosed wherein a primary image of the reticle and a secondary image of the primary image which has been telescopically directed to and reflected from a remote reflecting surface are superimposed on a video display. The primary image of the reticle is produced along a first optical path and the secondary image of the reticle along second optical path including Cassegrainian focusing telescopic optical elements. The optical paths are provided with a commonly shared portion for alternatively positioning means of different optical magnification. Alternative magnification are provided for producing first and second images on the video display for first coarse and then fine determinations and/or adjustments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.