reflection goniometer

reflection goniometer

[ri′flek·shən ‚gō·nē′äm·əd·ər]
(engineering)
A goniometer that measures the angles between crystal faces by reflection of a parallel beam of light from successive crystal faces.
References in periodicals archive ?
As early as 1829, Pistor & Schiek offered a reflection goniometer made to Professor Mitscherlich's specifications with an 8-inch silver circle divided to 10[double prime] indications, with microscope and telescope mounted on a marble base, for 250 Gulden.