Accession Number : ADD018540

Title :   Liquid Crystal Interferometer

Descriptive Note : Patent, Filed 5 Jul 95, patented 4 Feb 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bendell, Charles S

Report Date : 04 Feb 1997

Pagination or Media Count : 12

Abstract : An interferometer employs liquid crystals to effect optical path length changes in a Michelson-type interferometer. A beam splitter divides a first optical signal into second and third optical signals. The second optical signal is directed through a first array of liquid crystals, and the third optical signal is directed through a second array of liquid crystals. Mirrors reflect the second and third optical signals back through the arrays to the beam splitter which combines them into a fourth optical signal having an interference pattern. A detector array transforms the fourth optical signal into an electrical signal. A processing circuit is used to modulate the indices of refraction of the liquid crystals to effectuate optical path length changes between the second and third optical signals. The data processor may also be employed to transform the electrical signal into digital data which may be analyzed to discern spectral characteristics of the first optical signal that are of interest.

Descriptors :   *LIQUID CRYSTALS, *OPTICAL INTERFEROMETERS, *PATENTS, MEASUREMENT, RESOLUTION, PATHS, ARRAYS, SPECTRA, SIGNALS, PRECISION, LIGHT TRANSMISSION, INVENTIONS, MICHELSON INTERFEROMETERS

Subject Categories : Information Science
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE