DEVICE FOR MATCHING OF IMAGES IN FIELD OF VISION OF EYE-PIECE OF GONIOMETER Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: device includes two prism elements and cemented flat plate arranged between them. At least one outer face of plate is parallel to focal plane of eye-piece of goniometer. Ribs of prism elements are positioned in focal plane of eye-piece, reflecting layers are applied to planes of cemented plate. Apart from them device may be inserted with additional plate cemented to first one over common surface on which grid is marked. Plane-parallel plate or plane-convex lens may be cemented on at least one outer face of plate and on proper faces of prism. EFFECT: expanded application field. 5 cl, 6 dwg