Title :
A PC-interfaced, compact laser-diode feedback interferometer for displacement measurements
Author :
Donati, Silvano ; Falzoni, Luca ; Merlo, Sabina
Author_Institution :
Dipartimento di Elettronica, Pavia Univ., Italy
fDate :
12/1/1996 12:00:00 AM
Abstract :
We describe a laser-diode feedback interferometer for displacement measurements with directional discrimination and resolution better than 10-6 m. This new, compact instrument consists of a small optical head and a signal processing board, which is interfaced to a personal computer. The prototype developed has a dynamic range of 2 m and an accuracy of about 5 μm/m, using a corner cube as a remote reflector. Thanks to PC interfacing, the displacement is directly available in metric units and errors due to temperature fluctuations can be corrected with software signal processing
Keywords :
computer interfaces; computerised instrumentation; displacement measurement; error correction; laser frequency stability; light interferometry; measurement by laser beam; microcomputer applications; peripheral interfaces; semiconductor lasers; signal processing equipment; 2 m; PC interfacing; accuracy; compact laser-diode feedback interferometer; corner cube; displacement measurement; dynamic range; laser-diode feedback interferometer; optical head; personal computer; prototype; remote reflector; signal processing board; software signal processing; temperature fluctuations; Displacement measurement; Instruments; Laser feedback; Microcomputers; Optical feedback; Optical interferometry; Optical signal processing; Prototypes; Signal resolution; Software prototyping;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
