Coaxial electro-optical distance meter
US5774208A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A coaxial electro-optical distance meter has optical elements on light transmitting side which are located behind an objective lens such that light from a light transmitting member is reflected from a first reflecting surface disposed adjacent to an optical axis of the objective lens. The reflected light is emitted as transmitted light to a reflecting member disposed ahead of the objective lens. Optical elements on light receiving side are arranged such that received light from the reflecting member is reflected from a second reflecting surface disposed behind the first reflecting surface for guiding it to a light receiving member disposed beside the optical axis. The first reflecting surface is disposed such that the optical axis is positioned inside a luminous flux of the transmitted light. The cross section of the luminous flux of the transmitted light is reformed into a point-asymmetrical shape by a diaphragm plate having an opening therein for passing therethrough light from the light transmitting member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.