biplaten.
/ˈbʌɪpleɪt/ Optics.
A combination of two glass plates used in polariscopic observations.
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the world > physical sensation > sight and vision > optical instruments > instruments to refract, etc., light > [noun] > polariscope > parts of
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biplate1890
1890 T. Preston Theory of Light 121 Bi-plates.—A beam of light may be subdivided by refraction through two plates, of the same nature and equal thickness, placed at an angle.
1904 A. Schuster Introd. Theory Optics iv. 80 The ‘bi-plate’..serves either to separate or to bring together two parallel beams of light. It consists of two plane parallel plates of glass cemented together at an angle.
This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2018).
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n.1890