optical glass

/ˌɑptəkəl glæs/

Definitions of optical glass

1. noun

   clear homogeneous glass of known refractive index; used to make lenses
   types:

   crown glass, optical crown, optical crown glass

   optical glass of low dispersion and low refractive index

   flint glass, optical flint

   optical glass of high dispersion and high refractive index

   type of:

   glass

   a brittle transparent solid with irregular atomic structure