biprism


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Related to biprism: Fresnel biprism

biprism

[′bī‚priz·əm]
(optics)
A prism with apex angle only a little less than 180°, which produces a double image of a point source, giving rise to interference fringes on a nearby screen.
References in periodicals archive ?
Tenders are invited for procurement of Interference of Light by Fresnel Biprism
Newtons Ring Apparatus to determine wavelength of sodium light,Set up to determine the wavelength of sodium light by Fresnel's biprism,Setup to determine wavelength of sodium light using diffraction grating & spectrometer,Set up to measure small thickness of a piece of paper using Newtons Rings technique,Setup to find e/m of an electron by J.J.
The complex includes a high-resolution scanning transmission mode, a high-sensitivity energy dispersive X-ray spectrometer (EDX), a biprism for electron holography, and a digital camera.