3 frequency heterodyne laser interferometer that doubles the res

Absolute distance sensor

Absolute gravity inline measuring apparatus incorporating improv

Absolute intensity measurements in laser induced incandescence

Absolute interferometer measuring process and apparatus having a

Accumulative absorption-dispersion spectrophotometer

Accurate correlator of rotational and translational motions and

Achromatic self-referencing interferometer

Adjustable optical test apparatus including interferometer with

Adjustment for reflective surfaces in interferometers

Air-in-water indicator

Alignment apparatus and method for interferometer spectrometers

Alignment apparatus for use in exposure system for optically tra

All optical phase sensitive detector and image demultiplexer

An interferometric measuring system having temperature compensat

Analytical depth monitor utilizing differential interferometric

Analytical instrument optical element support system

Angle detecting apparatus for detecting angle of inclination of

Angle measuring interferometer

Angle measuring interferometer