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Optical instruments

Autocollimator
Optical instrument for non-contact measurement of angles
Bifocals
Eyeglass lens with two distinct optical powers
Binoculars
Pair of telescopes mounted side-by-side
Electron microscope
Type of microscope with electrons as a source of illumination
Glasses
Form of vision aid
Interferometry
Measurement method using interference of waves
Loupe
Small cylindrical or conical magnifying device without handle
Magnifying glass
Convex lens used to magnify images
MICROSCOPE
Satellite
Optical microscope
Microscope that uses visible light
Periscope
Instrument for observation from a concealed position
Scanning electron microscope
Type of electron microscope
Scanning tunneling microscope
Instrument able to image surfaces at the atomic level by exploiting quantum tunneling effects
Transmission electron microscopy
Technique in microscopy