Holographic straightness meter
US4466693A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 18, 1981 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Nov 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A holographic straightness meter comprising an optical element and a hologram disposed on a moving member and one pair of reflection elements disposed on a fixed member. The object beam and reference beam from the optical element are reflected by the reflection elements so as to impinge upon the hologram and form interference fringes on the screen placed behind the hologram. The number, interval, and inclination of these interference fringes vary with the amount of lateral displacement of the moving member. Thus by analyzing the interference fringes for such factors, the amount of the lateral displacement of the moving member can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.