Device for the investigation of objects by illumination with a dark background

摘要

Device for the examination by lighting a black background of a body or of an object, in particular of the surface of a spectacle lens, of the type comprising, in a housing or object support and a lighting means of a black background in an opening of observation. / p & & p & the light source 15 is supported by the screen 9 of the side opposed to the ouverure 17 in a fixed position and the well determined with respect to the periphery 11 of this screen and the means specular 14 and the housing 1 each comprise an opening of the mounting 2, 16. / p & & p & application for the examination and the reading by an operator of the various markings doors at the surface of glass or pieces of spectacles.