Optical roller wave gauge
US5251010A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1991 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jun 7, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8887
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical roller wave gauge for inspecting glass sheets processed on a horizontal roller hearth to determine roller wave distortion thereon includes a light source mounted to direct two parallel beams of light separated by a predetermined first distance onto the glass sheet, light detection means mounted to receive the two beams reflected from the surface of the glass sheet, first logic for determining the second distance between the beams at the light detection means, memory for storing a preselected number of second distances determined by the first logic, and second logic for retrieving the preselected number of stored second distances and generating a quality value representing the surface distortion on that portion of the glass sheet over which the preselected number of second distances was determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.