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H6 - Federal Item Name Directory
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21879
PRISM,OPTICAL INSTRUMENT
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FIIG: T271-M
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Entry Date: Apr-01-1974
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Concept:
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Status: A
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Applicability: MA
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Type: 0
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Definition: A transparent item with at least two polished plane surfaces inclined toward each other, designed for use in optical instruments to reflect and/or refract a beam of light. It may have one or more mirrored surfaces for greater reflection. Includes optical wedges used to divert paths of light by refraction, but to a lesser degree. See also BEAM SPLITTER, OPTICAL INSTRUMENT.
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Corresponding NIINs: 539
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