BSL Sign Language Dictionary

Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.

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optical device

How to sign: a device for producing or controlling light

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Categories: device

Within this category: autofocus, biprism, camera lucida, coelostat, collimator, diffraction grating, diffuser, finder, Kerr cell, laser, lens, Nicol prism, planetarium, polarimeter, prism, projector, Rochon prism, stereoscope, viewer

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