photodetector, spectrometer, photometer, polarimeter, dipole moment, photometry, monochromator, radiometer, heterodyne, coronagraph, telescope, optical telescope, spectroscope, spectroscopy, photoemission, diffraction, retroreflector, waveguide, phonon, josephson junction, spectra, photoluminescence, radial velocity, exciton, photoelectron, wavefront, spectroscopic analysis, plasmon, collimator, crystallographic, quasiparticle, astrometry, blackbody, photon, attosecond, deimos, resonator, astronomical telescope, wavelength, scintillator, resonant cavity, calorimetric, quadrupole, photodiodes, dispersive, photodiode, electron volt, photomultipliers, dipole, bolometer, planar, micrometer, infrared, illuminance, spectrographic, toroid, minos, femtosecond, mass spectrometer, circular polarization, manganite, photometric, azimuthal, tokamak, astron, muon, gradiometer, eclipsing binary, picosecond, amplitudes, magnetization, synchrotron radiation, tensor, quadrature, geoid, quasicrystal, kev, directional antenna, cantilevers, diffraction grating, undulator, redshift, imager, toroidal, magnetoresistance, birefringence, arcsecond, spectro, airglow, thermopile, cosmic ray, arrays, nernst, focal plane, kinematic, parallax, goniometer, heliostat, amplitude modulation, valence electron, lagrangian, nucleon, interferometers, interferometry, diode, amplifier, detector, receiver, microscope, oscilloscope, amplifiers, detectors, laser, sensor, transmitter, circuit, diodes

measuring instrument, measuring system