Accession Number : ADA263009


Title :   Measurement of a Michelson Interferometer Mirror Velocity With a Time Interval Analyzer


Descriptive Note : Final rept. Feb-Jun 1992


Corporate Author : CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD


Personal Author(s) : Combs, R J ; Knapp, R B ; Cathey, C T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a263009.pdf


Report Date : Jul 1992


Pagination or Media Count : 50


Abstract : This report documents the design, construction, and implementation of a time interval analyzer (TIA). The TIA is a precision counter that measures the dynamic variation in the time intervals (i.e., frequency) of a signal. The helium-neon (HeNe) laser signal from the servo mirror control circuitry of the interferometer provides a nearly constant frequency source. The HeNe signal frequency is directly proportional to the interferometer mirror velocity. A constant velocity is crucial for the proper operation of a Michelson interferometer, which is used in a Fourier transform spectrometer. The TIA provides a critical evaluation of velocity variations in a single interferometer mirror scan via analysis of the HeNe laser signal. Time interval counter, Time interval analyzer, Fourier transform spectroscopy.


Descriptors :   *MIRRORS , *HELIUM NEON LASERS , *MICHELSON INTERFEROMETERS , *TIME INTERVAL COUNTERS , VELOCITY , COMPUTER PROGRAMS , SIGNAL PROCESSING , SPECTROSCOPY , LASERS , VARIATIONS , PRECISION , INFRARED RADIATION , COUNTERS , INTERVALS , INTERFEROMETERS , INFRARED SPECTROMETERS , FOURIER SPECTROMETERS , SPECTROMETERS , MONOCHROMATIC LIGHT , PHOTODETECTORS , CIRCUIT BOARDS , SIGNALS , BEAM SPLITTING , INTEGRATED CIRCUITS , TIME INTERVALS , FOURIER TRANSFORMATION , FREQUENCY


Subject Categories : Lasers and Masers
      Test Facilities, Equipment and Methods
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE