Accession Number:

ADD012557

Title:

Absolute Distance Sensor.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Report Date:

1986-09-16

Pagination or Media Count:

9.0

Abstract:

The improved Absolute Distance Sensor has achieved presently a resolution of about 0.03 micron RMS for measurements over long distances. A two-color, synthetic Michelson interferometer employing a CO2 source us designed to sequentially switch between four sets of R and R line pairs and thereby provide a basis for forming simultaneous equations which are employed to greatly reduce the half wavelength ambiguity typical of single wavelength interferometers. Author

Subject Categories:

  • Lasers and Masers
  • Test Facilities, Equipment and Methods
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE