Optical tracing system for measuring elevation of a reference body above a reference surface
US5864145A · kind A · utility
7Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Jan 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides an optical tracing system for measuring elevation of a reference body above a reference surface, comprising a laser transmitter radiating a light beam in a downward direction; an optical unit for imaging the radiation reflected from said body and said surface on a detector; filtering means for separating light originating from said laser from background illumination, and signal processing means for identifying said reference body and for measuring the elevation thereof from said surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.