Related by context. Frequent words. (Click for all words.) 67 Fresnel lens 62 parabolic mirrors 57 reflector 56 eyepieces 55 beam splitter 55 aspheric 55 illuminators 55 heliostats 54 prisms 53 reflectors 53 collimator 52 interferometers 52 photometer 52 magnifications 52 fused silica 52 RGB LED 51 pulsed laser 51 ultrasonic sensors 50 interferometric 50 diffractive 50 photodiodes 50 photovoltaic PV panels 50 spectrographs 50 Moritex 50 parabolic trough 50 solar concentrators 49 eyepiece 49 infrared IR 49 millimeter diameter 49 cylindrical 49 apertures 49 scanning electron microscopy 49 photometry 49 gobo 49 photovoltaic modules 49 photovoltaic arrays 49 LED headlamps 49 Backlit 48 sensor arrays 48 magnifying lens 48 confocal microscope 48 radiometer 48 polarized lenses 48 solar cells 48 viewfinders 48 mylar 48 lenses 48 Mylar 48 retro reflective 48 infrared 48 spectrometers 48 WFC3 48 SmartBeam 48 LED Light Emitting 47 refract 47 photoluminescence 47 near infrared NIR 47 confocal 47 downlight 47 3mm thick 47 windsocks 47 prismatic 47 airfoils 47 curved surfaces 47 aperture 47 InGaAs 47 photodetector 47 illuminator 47 beams 47 electroplated 47 geometrical shapes 47 micron thick 47 neodymium magnets 47 refracting 47 optical wavelengths 46 CCD camera 46 lightship 46 optical coatings 46 camera obscura 46 loupe 46 diverters 46 parallax 46 Live MOS sensor 46 infrared rays 46 convex 46 optical telescope 46 monocular 46 light emitting diodes LEDs 46 parallax barrier 46 Cylindrical 46 laser beams 46 nm wavelength 46 sconce 46 AFMs 46 rectangular shaped 46 LED illumination 46 X ray beam 46 micro optics 46 interferometer 46 electroluminescent 46 Light Emitting Diode LED