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Machine translation
1. (WO1982000196) MOVEMENT MEASURING APPARATUS AND LANDMARKS FOR USE THEREWITH
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1982/000196    International Application No.:    PCT/GB1981/000104
Publication Date: 21.01.1982 International Filing Date: 16.06.1981
IPC:
G01B 11/00 (2006.01), G01B 11/26 (2006.01), G01S 17/42 (2006.01), G01S 17/50 (2006.01)
Applicants: MOVEMENT TECHNIQUES LIMITED (For All Designated States Except US).
MITCHELSON, David, Lloyd; (For US Only)
Inventors: MITCHELSON, David, Lloyd;
Priority Data:
Title (EN) MOVEMENT MEASURING APPARATUS AND LANDMARKS FOR USE THEREWITH
(FR) APPAREIL DE MESURE D'UN MOUVEMENT ET POINTS DE REPERE UTILISES AVEC CET APPAREIL
Abstract: front page image
(EN)Movement of a body part or other movable object is measured by attaching a retro-reflecting landmark (8) to the body part. An observation field (4) containing the landmark (8) is scanned using a beam (20) of radiation from a lamp (10) and reflecting it with a rotatable mirror (18) to scan the field. The retro-reflected light (42) is detected and the time of retro-reflection by reference to the phase of rotation of the mirror (18) is measured to provide a signal related to the angular position of the landmark (8) in the field (4). More than one landmark (8) can be observed simultaneously by using landmark (8) with edge filtering characteristics and appropriate arrangements for discriminating retro-reflected light (42) according to spectral characteristics.
(FR)Le mouvement d'un corps ou autre objet mobile est mesure en attachant un point de repere de retro-reflexion (8) au corps. Un champ d'observation (4) contenant le repere (8) est balaye en utilisant un faisceau (20) de rayons emis par une lampe (10) et en le reflechissant avec un miroir rotatif (18) pour balayer le champ. La lumiere retro-reflechie (42) est detectee et le temps de retro-reflexion en reference a la phase de rotation du miroir (18) est mesuree pour produire un signal qui est fonction de la position angulaire du repere (8) dans le champ (4). Il est possible d'observer simultanement plusieurs reperes (8) en utilisant un repere (8) ayant des caracteristiques de filtration des bords et des dispositifs appropries pour effectuer la discrimination de la lumiere retro-reflechie (42) selon des caracteristiques spectrales.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)