英和和英

an optical instrument

an optical instrument

an optical instrument, called spectroscope

a lens or mirror used to concentrate light on an object, called a condenser

optical supplies

an optical microscope

an optical device called radio telescope

optical instruments used by the military

glass used for optical instruments

an optical instrument for spectrographic analysis

lighting equipment

spectroscopy

an optical machine called 8mm projector

a medical optical instrument called {isotope camera}

a device for projecting illuminated images, called a projector

an optical device for viewing photographic transparencies

an observation instrument, called microscope

an optical instrument called a Keplerian telescope

the eye unaided by optical instruments

an optical device called a collimator

an optical device for projecting a beam of light

an optical instrument called mineral microscope

apparatus for observation and measurement of optical phenomena

the optics of a telescope

a telescope

a thing that reflects

the magnifying power of an optical instrument

an optical toy in a tube

an optical instrument for medical use called scintillation camera

of an optical instrument, crossed lines