Optical device for measuring relative position of or angle betwe
Optical devices having a wavelength-tunable dispersion...
Optical differential profile measurement apparatus and process
Optical displacement measurement apparatus and information recor
Optical displacement measuring apparatus including a light-emitt
Optical displacement measuring apparatus utilizing Fourier trans
Optical distortion analyzer system
Optical dual Fabry-Perot interferometric strain/temperature sens
Optical element and spectroscopic device using the same
Optical encoder for optically measuring displacement of moving b
Optical encoder including a plurality of phase adjusting grating
Optical encoding apparatus for measuring displacement of an obje
Optical examination apparatus particularly useful as a Fizeau in
Optical fiber detection system using an intensity-modulating sen
Optical fiber gyro
Optical fiber gyro
Optical fiber gyro with memory storing data measured under appli
Optical fiber gyroscope
Optical fiber gyroscope sensing coil having a reduced sensitivit
Optical fiber gyroscope with (3.times.3) directional coupler