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Machine translation
1. (WO1980000873) OPTOELECTRONIC DEVICE FOR HIGH PRECISION DIMENSIONAL MEASUREMENTS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000873    International Application No.:    PCT/FR1979/000093
Publication Date: 01.05.1980 International Filing Date: 15.10.1979
IPC:
G01B 11/00 (2006.01), G01B 21/00 (2006.01), G01D 5/34 (2006.01)
Applicants:
Inventors:
Priority Data:
7829365 16.10.1978 FR
Title (EN) OPTOELECTRONIC DEVICE FOR HIGH PRECISION DIMENSIONAL MEASUREMENTS
(FR) DISPOSITIF OPTOELECTRONIQUE DE MESURE DIMENSIONNELLE DE HAUTE PRECISION
Abstract: front page image
(EN)Optoelectronic device for high dimensional and displacement measurements comprising a body (101), a mobile testing spike (105), whose displacements have to be measured, the said spike sliding inside the said body by means of two bearings carried by it, a contact key (106) at the end of the spike, a light source (112) and two photoreceptors (1, 2) adjacent and solidly locked to the body placed symmetrically on the one and on the other side of the spike, a mask (109) carried by the spike and situated between the source and the photoreceptors and showing opaque and transparent portions, the movement of the mask resulting in the increase or decrease, respectively, of the sensible surfaces of the two photoreceptors exposed to the light source. The device is caracterized in that the mask is substantially symmetrical with the contact key with regards to the centre point between the two bearings from which it results that the mechanical play of the spike in its bearing involves only a zero or negligible amount of variation of the difference in the lighting of the photoreceptors.
(FR)Dispositif optoelectronique de mesure de dimensions et de deplacements comprenant un corps (101), une tige mobile de palpeur (105) dont on veut mesurer les deplacements, ladite tige coulissant dans ledit corps gra a deux paliers portes par celui-ci, une touche de contact (106) a l"extremite de la tige, une source de lumiere (112) et deux photorecepteurs (1, 2) contigus solidaires du corps et positionnes symetriquement de part et d"autre de la tige, un cache (109) porte par la tige et situe entre la source et les photorecepteurs et ayant des parties transparentes et opaques, le mouvement du cache ayant pour effet d"augmenter et de diminuer respectivement les surfaces sensibles exposees a la source de lumiere des deux photorecepteurs, Le dispositif est caracterise en ce que le cache est substantiellement symetrique de la touche de contact par rapport au point milieu entre les deux paliers, d"ou il resulte que le jeu mecanique de la tige dans ses paliers de guidage n"entraine qu"une variation nulle et negligeable de la difference des eclairements des photorecepteurs.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)