Related by context. Frequent words. (Click for all words.) 70 parabolic mirrors 62 heliostats 59 solar concentrators 57 collimated 56 photovoltaic arrays 55 photovoltaic PV panels 55 eyepieces 54 photovoltaic cells 54 solar concentrator 53 solar panels 52 collimator 52 hemispherical 52 microelectrodes 51 pulsed laser 51 waveguides 51 armatures 51 interferometers 51 refracting 51 arrays 51 interferometric 50 laser beams 50 photovoltaic panels 50 sensor arrays 50 rooftop photovoltaic 50 astronomical telescope 50 tightly spaced 50 WFC3 50 zinc oxide nanowires 50 diffraction pattern 50 Fresnel lens 50 diffractive 50 prisms 50 beam splitter 49 solar cells 49 trapezoids 49 aspheric 49 reflectors 49 solar 49 parabolic trough 49 clerestory windows 49 frequency comb 49 reflector 49 halogen lights 49 reflective surfaces 49 photocell 49 InGaAs 49 photonic crystal 49 vertically stacked 49 X ray beams 49 optical wavelengths 48 electrically conducting 48 microchannel 48 radiometer 48 telescope 48 infrared rays 48 photodetectors 48 stacked vertically 48 photometer 48 scanning tunneling microscope 48 HiRISE camera 48 Venetian blinds 48 Live MOS sensor 48 hollow tubes 48 louvers 48 eyepiece 48 photonic crystals 48 anodised aluminum 48 apertures 48 colliders 48 stair treads 48 plasmon 48 mullions 48 photodetector 48 photovoltaic solar panels 48 aperture 47 light emitting diodes LEDs 47 CCD camera 47 solar arrays 47 curved surfaces 47 gold nanorods 47 concentric rings 47 florescent light 47 photodiodes 47 sunbeams 47 micrometre 47 shorter wavelengths 47 downlight 47 airfoils 47 louvered 47 superlens 47 cooling fins 47 X ray beam 47 plasmonic 47 halogen lighting 47 lenses 47 nanosized 47 laser pulses 47 cylindrical 47 telescopes 47 latticed 47 sunlight