Used attributively and in the possessive to designate apparatus, phenomena, and concepts relating to his work in optics, as Fresnel biprism = biprism…

Used attributively and in the possessive to designate apparatus, phenomena, and concepts relating to his work in optics, as Fresnel biprism = biprism…

In full total reflectometer. An instrument for determining the refractive index of a transparent solid (or liquid) by measuring the critical angle…

a photometric device for measuring the gloss of surfaces.

Used attributively in connection with his discoveries in optics. a window in a laser, etc., so arranged as to polarize light by reflection at the…