optical instrument

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Noun

optical instrument - an instrument designed to aid vision

binoculars, field glasses, opera glasses - an optical instrument designed for simultaneous use by both eyes

esophagoscope, oesophagoscope - an optical instrument for examining the inside of the esophagus

instrument - a device that requires skill for proper use

jeweler's glass - an optical instrument used by jewelers; has one or more lenses and is used to view features not readily seen

lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images

periscope - an optical instrument that provides a view of an otherwise obstructed field

projector - an optical instrument that projects an enlarged image onto a screen

sights - an optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument

eyeglasses, glasses, specs, spectacles - optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

prism spectroscope, spectroscope - an optical instrument for spectrographic analysis

References in classic literature ?

With these facts, here far too briefly and imperfectly given, which show that there is much graduated diversity in the eyes of living crustaceans, and bearing in mind how small the number of living animals is in proportion to those which have become extinct, I can see no very great difficulty (not more than in the case of many other structures) in believing that natural selection has converted the simple apparatus of an optic nerve merely coated with pigment and invested by transparent membrane, into an optical instrument as perfect as is possessed by any member of the great Articulate class.

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Costello inspected the young couple again with her optical instrument. "He is very handsome.

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You know that optical instruments have acquired great perfection; with certain instruments we have succeeded in obtaining enlargements of 6,000 times and reducing the moon to within forty miles' distance.

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(We observe the same thing in children to-day, whose usage in this particular is a striking and beautiful instance of the law that the infancy of individuals reproduces the methods and stages of development characterizing the infancy of races.) In the work of these primitive scribes all the punctuation is found, by the modern investigator with his optical instruments and chemical tests, to have been inserted by the writers' ingenious and serviceable collaborator, the common house-fly -- Musca maledicta .

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Summary: TEHRAN (FNA)- A team of physicists and bioengineers announced that they have developed an optical instrument allowing them to control the behavior of a worm just by shining a tightly focused beam of light at individual neurons inside the organism.

Scientists Control Worms' Behavior by Light

has developed exceptionally precise optical instrument windows as small as 0.20 millimeters in diameter.

Submillimeter optical windows available from Bern

What optical instrument is used by surveyors to measure vertical and horizontal angles?

QUIZ OF THE DAY

The stereoscope, an optical instrument which views two images of the same object from different angles to produce a 3D-type illusion, has a cherrywood case.

Co-founder in souvenirs gift to zoo

ASCS is a precision optical instrument that scans and measures openings and wire diameters, supporting sieves up to 18 inches in diameter, with openings from 20 microns to 12.5 mm.

Sieve Certification System from Vision Machines

There was a kind of dialectic between the museum as an instrument and an actual optical instrument, which disappears when you look through it.