Title :
High-resolution laser homodyne interferometer
Author :
Midgley, J.A. ; Sander, K.F.
Author_Institution :
University of Cambridge, Engineering Department, Cambridge, UK
Abstract :
A simple Michelson interferometer, illuminated by an amplitude stabilised He-Ne laser, has been used to monitor extremely small optical-path-length variations. The instrument is capable of determining a change of 1 Å (2×10¿3 rad), with a time resolution of approximately 3 ¿s.
Keywords :
distance measurement; gas lasers; laser beam applications; length measurement; light interferometers; optoelectronic devices; He-Ne laser; Michelson interferometer; distance measurement; homodyne technique; laser beams applications; optical path length monitoring;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19710077
