optical crown


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optical crown

n
(General Physics) an optical glass of low dispersion and relatively low refractive index. It is used in the construction of lenses
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Noun1.optical crown - optical glass of low dispersion and low refractive index
optical glass - clear homogeneous glass of known refractive index; used to make lenses
References in periodicals archive ?
This optical crown can also be fully optical made of sapphire in order to have a full optical access to the upper part of the combustion chamber.
Color correction for a pair of optical crown and flint glasses is limited to two specific wavelengths, usually chosen to lie in the red and blue.
The lenses are made from garden-variety optical crown and flint, but such glass is harder to obtain today than a mirror blank.

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