Patent · US Active

Method for speckle mitigation in an interferometric distance meter by determining a pointing direction

US8896843B2 · kind B2 · utility

4Cited by
1References
16Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 13, 2010
Grant dateNov 25, 2014
Priority date—
Expiry dateOct 15, 2031

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01B2290/45
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method for speckle mitigation in an interferometric distance meter comprises the steps of transmitting optical radiation with at least one wavelength λ to a target to be surveyed, receiving a portion of the optical radiation scattered back by the target in an optical axis (OA), wherein the optical radiation forms a speckle field, converting the received optical radiation into at least one received signal, determining a true distance to the target from the received signal by absolute or incremental interferometric distance measurements. In the method the true pointing direction relative to the optical axis (OA) is determined, wherein the distance error due to speckle effects is corrected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.