Surveying instrument
US6445446B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1999 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4811
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photodetecting system for an automatic surveying instrument equipped with an automatic tracking system is capable of controlling the automatic surveying instrument by simple photodetecting means. A collimating optical system collimates the surveying instrument with respect to an object, a splitting optical device splits incident light rays received from the collimating optical system into light rays that travel toward first and second photodetecting devices, respectively, a first light condensing device disposed on an optical path between the first photodetecting device and the splitting optical device gathers the light rays in a first direction, and a second light condensing device disposed on an optical path between the second photodetecting device and the splitting optical device gathers the light rays in a second direction perpendicular to the first direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.