Process and device for measuring optical quality of the surface of a transparent object by contact with a wetted flexible surface
US5602648A · kind A · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1995 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Aug 31, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In order to measure the optical quality of the surface of a transparent sheet, the second surface of the sheet is placed in contact with a flexible material which is wetted with an index liquid. In the case of soda lime glass, water is suitable. The optical measurement can be carried out by traditional methods, ombroscopy in particular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.