Method of forming moire contour lines
US4102577A · kind A · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1977 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Jan 4, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/254
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light beam is periodically chopped and then converted to a plane of light by a cylindrical lens. As the plane of light is chopped, it is caused to scan an object in the direction normal to the plane of the light to form a grating pattern on the object. The image of the grating formed on the object is superposed with a standard grating to obtain a moire pattern which represents the moire contour lines of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.