spectro, radiometer, photometric, polarimeter, monochromator, airglow, coronagraph, spectroscope, spectroscopic analysis, spectrometer, illuminance, spectrophotometer, colorimeter, spectrographic, bolometer, pyrometer, microbalance, reflectometer, photometry, microspectrophotometer, photoluminescence, interferometer, chemiluminescence, scintillator, calorimetric, ionisation, backscattering, retroreflector, photoelectron, cuvette, galvanometer, imager, corona discharge, reflectance, scintillation, dipole moment, cryostat, photoemission, densitometer, fluorometer, collimator, blackbody, multispectral, deimos, josephson junction, ultraviolet, photocells, eclipsing binary, arcsecond, azimuthal, rheometer, gradiometer, photolysis, kev, absorbance, spectroscopy, photodetector, paramagnetic, diffractometer, emissivity, mass spectrometer, photomultiplier, infrared, radial velocity, neutron radiation, optical telescope, photomultipliers, electroluminescence, cherenkov radiation, parabolic mirror, circular polarization, spectra, extragalactic, quadrupole, ionization, electron optics, luminous flux, manganite, phototransistor, brightness, ultraviolet lamp, millivolt, piezoelectric crystal, detector, jovian, strain gauge, luminous intensity, cepheid variable, magnetoresistance, nightglow, zeiss, diffraction, grond, epsilon aurigae, diffraction grating, earthshine, microwatt, heterodyne, emittance, viscometer, exosphere, photodiode, photometers, spectrograph, oscilloscope, micrometer, microscope, calorimeter, oscillograph, recorder, analyser, interferometers

cytophotometer, spectrophotometer

measuring instrument, measuring system, photographic equipment

exposure meter, light meter