Electric distance meter
US8917382B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2009 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Jul 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electric distance meter is downsized by using a condensing optical member having a small outer diameter (effective diameter) as a condensing optical member in a light-receiving optical system, reducing a focal length of the condensing optical member without reducing a spread angle to a light-receiving optical fiber and reducing a diameter of the light-receiving optical fiber. An optical distance meter emits outgoing light from a light source to an object, and receives reflection light R from the object by a light receiver, so as to perform distance measurement. The optical distance meter includes an emitting optical system which irradiates the object by the emission light via an objective lens and a light-receiving optical system which guides the reflection light via the objective lens to the light receiver, and a cone prism which changes a cross-section shape of a light beam without generating a transmission deflection angle is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.