Related by context. Frequent words. (Click for all words.) 70 luminous flux 67 emissivity 67 lumen output 66 photometric 65 transmittance 65 photometer 64 irradiance 64 brightness 64 photometry 64 luminance 64 reflectance 64 illumination 63 RGB LED 63 transmissive 62 reflectivity 61 absorbance 61 RGB color 61 #um [002] 60 interferometric 60 downlight 60 cd m 59 lm W 59 external resistor 59 beam splitter 58 LED illumination 58 nm wavelength 58 LCD backlighting 58 CCD camera 58 viewability 58 LCD backlight 58 #.#μm [001] 58 LED arrays 57 photoluminescence 57 transflective 57 #mV [002] 57 spectrophotometers 57 -# dBm [002] 57 -# dBm [001] 57 photodetector 57 cd/m2 57 1kHz 57 shorter wavelengths 57 #μm [002] 56 halogen bulb 56 LEDs 56 photodiode 56 ultrasonic sensors 56 surface roughness 56 photodetectors 56 milliwatt 56 millivolts 56 output voltage 56 bandgap 56 optical wavelengths 56 #cd/m# 56 8W 56 interferometry 56 magnifications 56 colorimetric 56 impedances 56 collimator 56 responsivity 56 photocell 56 keV 55 linearization 55 lux 55 anisotropy 55 airflows 55 luminaire 55 visible wavelengths 55 wavefront 55 interferometer 55 -# dB [001] 55 photodiodes 55 greyscale 55 infrared IR 55 diffractive 55 Adobe RGB 55 directivity 55 isotropic 55 #dBm [001] 55 #.#W [003] 55 LED 55 #.#nm [001] 55 spectrographs 54 electrophoretic 54 InGaAs 54 sunlight readable 54 parallax 54 diffraction limit 54 backlit display 54 lumens 54 fluorophores 54 interferometers 54 infrared rays 54 near infrared NIR 54 thermal dissipation 54 photonic crystal 54 tropospheric 54 watt LED 54 micron thick