Related by context. Frequent words. (Click for all words.) 57 photometer 55 heliostats 54 scanning tunneling microscope 54 collimator 54 Fresnel lens 54 reflector 54 spectrographs 53 pulsed laser 52 ion beam 52 spectrometers 52 interferometer 52 photodetector 51 eyepieces 51 photovoltaic cells 51 radiometer 51 X ray beam 50 optical microscope 50 refracting 50 diffractive 50 near infrared NIR 50 eyepiece 50 parabolic trough 50 sun rays 50 optical telescope 50 photonic crystal 49 frequency comb 49 illuminator 49 silicon substrate 49 molten salt 49 waveguide 49 gold nanorods 49 solar concentrator 49 fluorescent lamp 49 photodiode 49 lotus leaf 49 X ray beams 48 spectrometer 48 microelectrodes 48 micro optics 48 interferometers 48 plasmons 48 infrared rays 48 hemispherical 48 terahertz radiation 48 microfluidic device 48 photovoltaic arrays 48 waveguides 48 particle detector 48 transmission electron microscope 48 scanning electron microscope 48 lunar soil 47 photolithography 47 chromophores 47 optical wavelengths 47 microchannels 47 prisms 47 photometry 47 photodiodes 47 ultraviolet light 47 sunlight 47 interferometric 47 sunbeam 47 particle detectors 47 quartz crystal 47 ESO Very Large Telescope 47 photodetectors 47 ionisation 47 capillary electrophoresis 47 CCD camera 47 transmissive 47 telescope 47 optical microscopy 47 confocal microscopy 47 nanospheres 46 parallax barrier 46 translucence 46 laser beam 46 downlight 46 optical tweezers 46 InGaAs 46 visible wavelengths 46 light emitting diodes LEDs 46 sunbeams 46 cylindrical 46 fluorescent dyes 46 light emitting 46 X ray fluorescence 46 radar altimeter 46 optical microscopes 46 laparoscope 46 spectrally 46 Fresnel 46 rectangular shaped 46 neutron scattering 46 electrode 46 ultrasonics 46 microstructures 46 nanocrystals 46 bandgap 45 nanorods 45 sconce