System for measuring and recording three dimensional configuration of object
US4051483A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1976 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Sep 3, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/254
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An encoder for converting a distance to an electric signal is connected with a computer to put a distance signal into the computer. Th encoder is put on a moire pattern obtained by interference between a standard grating and a deformed image of the standard grating deformed by the surface of a three dimensional object. The distance between moire fringes is put into the computer. The computer is supplied with a signal indicting whether the surface is convex or concave. The depth or height of a point on the moire pattern is calculated by the computer, and a contour of the three dimensional object is obtained. An X-Y recorder is connected with the computer to draw the contour of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.