Dual-frequency heterodyne laser-path-measuring device for measuring e.g. distance, has light conductors and signal line for electronic signal transmitting laser light and/or laser signal from electronic unit to interferometer unit

摘要

The device has an electronic unit (1) producing a laser beam with a stabilized wavelength, and an interferometer unit (2) producing an interference signal with help of the laser beam. Flexible light conductors (3.1, 3.2) and a signal line (3.3) for an electronic signal are present for transmitting laser light and/or laser signal from the electronic unit to the interferometer unit. The interferometer is provided with a beam-position-detector (2.6) that detects position variation of a retro reflector.