Apparatus for measuring three-dimensional curved surface shapes
US5102224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Mar 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2522
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-dimensional curved surface shape measuring apparatus of the slit light linear scanning type. In accordance with a composite image u(x', y') produced by image composing means when a slit light is scanned over a surface of an object to be measured, a measured value or computed value u.sub.o (x', y') of a composite image with respect to a reference plane, a light projecting angle .theta. to the reference plane and a reference plane-television camera distance a, a necessary computational processing is performed to determine a three-dimensional curved surface shape f(x, y) of the surface of the object which is free of any distortions due to a perspective effect of the television camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.