galvanometer, collimator, photoelectron, pyrometers, photomultipliers, collimation, scintillator, photodetector, diffraction grating, strain gage, monochromator, piezoelectric crystal, goniometer, toric lens, iris diaphragm, voltage divider, photolithographic, cytometer, subminiature, microbalance, electron optics, pellicle, fiducial, backscattering, etalon, photomultiplier, azimuthal, phototransistor, josephson junction, zeiss, colorimetry, capillary tube, eyepieces, heterodyne, radiometry, amplitude modulation, crystal oscillator, tomographic, pmos, polarimeter, transmissivity, cuvette, chemiluminescence, dispersive, resonant cavity, thermopile, variable resistor, dipole moment, interlaced scanning, leadless, spectrophotometry, pulser, photoconductive, lightwave, micrometer, midplane, electret, thyristor, illuminance, pentaprism, electroluminescence, image intensifier, wavefront, reciprocating saw, absorbance, absorption coefficient, photoluminescence, oring, keratectomy, photopolymer, electrophoretic, photometer, coercivity, photodiode, hysteresis loop, demultiplexer, electromotive force, manganite, magnetisation, servomotor, reflectometer, diffraction, spectro, planar, handwheel, submicron, perimetry, microspectrophotometer, capacitances, opto, pentile, rheometer, triaxial, micromanipulation, dipole antenna, mosaicking, waveband, polyphase, platens, thoracoscope, chamfering, ferrites