Abstract: The opto-electronic system for dimension-measuring device comprises a transparent rule (30) comprising at least one portion provided with a succession of opaque graduations (31), a photo-emitter (20), a photo-detector (21), an integrated optical bloc (1) capable of concentrating the light beam generated by the photo-emitter (20) on the rule portion, and of concentrating the light beam having crossed said rule (30) on said photo-detector (21). The optical bloc (1), the photo-emitter (20) and said at least one photo-detector (21) are mounted on the same printed circuit board (2). The rule (30) occupies a plane perpendicular to said printed circuit board (2). The optical bloc comprises optical surfaces disposed opposite each side of said rule (30).

Abstract: A comparator measures and compares linear or angular dimensions. The comparator includes a metallic casing (2), and two bearings (23,24) such that a sensing probe (3), going through said casing (2) and worked directly into the casing (2), can be accommodated. Two sockets (8,9) of the comparator are firmly attached to the casing (2). A measuring system of the comparator includes a mobile portion (33) driven by the sensing probe and a fixed portion (27) firmly attached to the casing (2). A housing (10) of the comparator completely covers the outer sides (25) of the casing (2) and is held by the two sockets (8,9).