Laser surveying system and distance measuring method
US7884923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2008 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Dec 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser surveying system, comprising a light source for emitting a laser beam, a projection optical system for turning the laser beam from the light source to a parallel luminous flux, a scanning unit for projecting the luminous flux of the projected laser beam for scanning, a scanning direction detecting unit for detecting a scanning direction, a photodetection optical system for receiving a reflected light of the projected laser beam from an object to be measured, a photodetection element for performing photo-electric conversion of the reflected light received via the photodetection optical system, and a distance measuring unit for measuring a distance based on a signal from the photodetection element, wherein the projection optical system has a luminous flux diameter changing means, and a luminous flux diameter of the projected laser beam is enabled to be changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.