Related by context. Frequent words. (Click for all words.) 56 eyepiece 55 loupe 55 interferometric 55 photometer 53 eyepieces 52 confocal microscope 52 monocular 51 lenses 51 spectrographs 51 collimator 51 imager 51 CCD camera 50 Nikkor 50 confocal 50 magnifications 49 colorimeter 49 reflector 49 interferometry 49 photometry 49 emissivity 49 photoluminescence 49 #X zoom 49 Zeiss 49 wavefront 48 infrared 48 photodetector 48 diffractive 47 #mm f/#.# [002] 47 STIS 47 opto 47 optic 47 lens 47 NICMOS 47 RGB LED 47 ZEISS 47 pinhole 46 transmission electron microscope 46 multispectral 46 optical microscopy 46 telescope 46 magnification 46 scanning electron microscope 46 #mm F#.# [002] 46 Lenses 46 spectroscopic 46 FOV 46 #x# inch [002] 46 magnifying lens 46 optics 46 Spherical 46 binocular 46 optical coherence tomography 46 optical microscope 45 scanning electron microscopy 45 fused silica 45 interferometer 45 WFPC2 45 beam splitter 45 Fluorescence 45 illuminators 45 fluoresces 45 aperture 45 fluorophores 45 near infrared NIR 45 hemispherical 45 micrometre 45 ultraviolet UV 45 macro lens 45 Fresnel lens 45 luminescence 45 photodiodes 45 5x optical zoom lens 45 adaptive optics 45 #.#μm [001] 45 hollow shaft 44 gamma camera 44 F#.# [001] 44 rangefinder 44 confocal microscopy 44 zoom lens 44 fluorescence 44 photometric 44 optically 44 CCDs 44 XMM Newton 44 fisheye 44 spectrometers 44 Celestron 44 OSIRIS 44 hyperspectral 44 vignetting 44 spectrometer 44 lense 44 optical microscopes 44 panoramic camera 44 fluorescent dye 44 #mm lens [001] 44 #.#x optical zoom [001] 44 nanomechanical 44 #mm F#.# [001] 44 frameless