biprism

(ˈbaɪˌprɪzəm)

(General Physics) a prism having a highly obtuse angle to facilitate beam splitting

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Noun

biprism - an optical device for obtaining interference fringes

optical device - a device for producing or controlling light

optical prism, prism - optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image

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References in periodicals archive ?

Alternatively, the use of slab-off or biprism single vision lenses could be considered should the patient want one pair of spectacles.

Anisometropia: does this mean we have to dispense single vision lenses?

Two semicircles were visible through the Biprism. The tension knob is turned to alter the force applied to the cornea, and the readings of IOP are taken out in mmHg when the internal aspect of the two semicircles is in contact with each other.