iriscope

iriscope

(ˈaɪrɪˌskəʊp)
n
an instrument that displays the prismatic colours, consisting of a polished black glass which is breathed upon via a tube
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

iriscope

a polished black glass, the surface of which becomes iridescent when it is breathed upon through a tube.
See also: Color, Light
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References in periodicals archive ?
Initially the image of an eye is acquired by a device called iriscope specifically designed for eye image acquisition at a high resolution.
In the underlying research work it is assumed that the luminosity level will be the same for all the images as each image is obtained by an iriscope working in similar conditions.