Related by context. Frequent words. (Click for all words.) 60 photometer 57 photoluminescence 56 dispersive 56 collimator 55 interferometric 55 photodetector 54 photodiode 54 photometric 54 reflectance 53 near infrared NIR 53 ionisation 53 elemental composition 53 photometry 53 phonon 52 luminescence 52 absorbance 51 surface roughness 51 interferometry 51 spectral 51 diffraction 51 analyte 50 phosphors 50 excitation 50 scanning electron microscopy 50 X ray fluorescence 50 illumination 50 brightness 50 FRET 49 fluorescence 49 dopant 49 electromagnetic interference EMI 49 ionization 49 luminous flux 49 diffractive 49 ultrasonics 49 CCD camera 49 quantization 49 isotropic 49 confocal 49 fluorophores 48 ionospheric 48 optical microscopy 48 atmospheric turbulence 48 ultraviolet UV 48 chroma 48 luminance 48 MeV 48 electrophoretic 48 photodiodes 48 InGaAs 48 infrared IR 48 tropospheric 48 detector 48 spectrographs 48 Fluorescence 48 radiometer 48 transmittance 48 photocell 47 neutron 47 CCD sensors 47 FT IR 47 ionizing 47 colorimetric 47 emissivity 47 pulsed laser 47 illuminator 47 interferometer 47 CCDs 47 electron density 47 EMI RFI 46 spectrally 46 spectroscopy 46 confocal microscopy 46 spectroscopic 46 anisotropy 46 moiré 46 luminosity 46 Pulsed 46 keV 46 nanocrystal 46 electrostatic discharge 46 photon 46 harmonic distortion 46 phosphorescence 46 amplitudes 46 illuminators 46 spectrometry 46 optical 46 ultraviolet UV light 46 spatial resolution 46 noise ratio SNR 46 #.#μm [001] 46 photonic crystal 46 Electrostatic 46 multispectral 46 prismatic 46 auroral 46 Raman spectroscopy 46 shorter wavelengths 46 X ray diffraction 45 sensor arrays