Optical testing of surface flatness

Optical thickness profiler using synthetic wavelengths

Optical three-dimensional profilometry method based on processin

Optical transmission characteristic measuring apparatus and cali

Optical type sensor for use as an optical measuring head or opti

Optical wavefront analyzer and method using a single wave shifte

Optical waveguide amplifier source gyroscope

Optical waveguide spectrum analyzer and method

Optical wavelength demultiplexing filter for passing a selected

Optical wavelength meter

Optical wavelength monitor using blazed diffraction grating

Optical, interferometric hole gauge

Optical-fiber gyroscope

Optical-fiber gyroscope of sagnac type having a fiber-optic loop

Optical-fiber measuring device, gyrometer, central navigation an

Optical-interference type angular velocity or rate sensor having

Optically biased twin ring laser gyroscope

Optically differentiating and adding passive ring laser gyroscop

Optically measuring the carrier concentration in a semiconductor

Optically multiplexed imaging system and methods of operation