Method of measuring surface of a liquid by illuminating the surface of the liquid
US10527480B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2016 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Aug 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2513
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring a surface of a liquid, the surface of the liquid having an edge which contacts a solid structure and an interior area which does not contact the solid structure. The surface of the liquid and the solid structure are illuminated with a pattern so that an upper part of the pattern is projected onto the solid structure to form an upper projected pattern and a lower part of the pattern is projected onto the interior area of the surface of the liquid to form a lower projected pattern. An image of the upper projected pattern is acquired and analysed to determine a height of the edge of the surface of the liquid. An image of the lower projected pattern is acquired and analysed to determine a characteristic of the interior area of the surface of the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.