Electronic endoscope with position display

Details Electronic endoscope with position display Electronic endoscope with position display

A - Human Necessities

61

B

A61B 1/05 (2006.01) A61B 1/00 (2006.01) A61B 1/005 (2006.01) A61B 1/055 (2006.01) A61M 25/01 (2006.01) G02B 23/24 (2006.01)

Patent

CA 2206809

A position indicating video display system is provided for an endoscope of the type having an objective lens (48), a movable zoom lens (60), a movable solid state imaging device (50) for picking up the image formed by said objective lens and transferred by said zoom lens, means for generating a visual display of the image (200) seen by the objective lens, and control means (166, 172) for moving the zoom lens and the imaging device so as to assure that for each position occupied by the zoom lens the imaging device is positioned so that its image receiving surface is in the focal plane of the zoom lens. The position indicating video display system comprises means for generating first and second movable markers (282, 288) indicative of the instantaneous positions of the zoom lens (60) and the solid state imaging device (50) along the optical axis, and additional limit markers (280A, 280B, 286A, 286B) indicative of the maximum and minimum limits of the travel path of the zoom lens and the solid state imaging device.

L'invention concerne un système d'affichage de position pour un endoscope équipé comme suit: objectif (48), objectif zoom mobile (60), dispositif d'imagerie à semi-conducteur mobile (50) restituant l'image obtenue par l'objectif et transmise par l'objectif zoom, système d'affichage de l'image (200) vue par l'objectif, et dispositif de commande (166, 172) permettant de déplacer l'objectif zoom et le dispositif d'imagerie afin de veiller à ce que, pour chaque position occupée par l'objectif zoom, la surface de réception des images du dispositif d'imagerie se trouve dans le plan focal de l'objectif zoom. Le système d'affichage de position comprend un dispositif qui établit un premier et un second marqueur mobile (282, 288) indiquant les positions instantanées de l'objectif zoom (60) et du dispositif d'imagerie à semi-conducteur (50) le long de l'axe optique, ainsi que des marqueurs de limite supplémentaires (280A, 280B, 286A, 286B) indiquant les limites maximum et minimum du trajet de déplacement de l'objectif zoom et du dispositif d'imagerie à semi-conducteur.

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