Electronic endoscope with zoom lens system

Details Electronic endoscope with zoom lens system Electronic endoscope with zoom lens system

A - Human Necessities

61

B

A61B 1/05 (2006.01) A61B 1/00 (2006.01) A61B 1/002 (2006.01) A61B 1/005 (2006.01) A61M 25/01 (2006.01) G02B 7/10 (2006.01) G02B 23/24 (2006.01)

Patent

CA 2177283

An endoscope having an objective lens (48), a zoom lens (60), a solid state imaging device (50), and a control means 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 control means also comprises means for sensing the position of said zoom lens and said imaging device along the optical axis of the endoscope, a look-up table containing data as to the spacing required to be maintained between said imaging device and said zoom lens in order for the focal plane of said zoom lens to be located substantially at the image receiving surface of said imaging device for various positions of said zoom lens system, means for accessing said data, and means for moving said zoom lens system and or said imaging device in accordance with the accessed data.

Endoscope comprenant un objectif (48), un zoom (60), un générateur d'images à semi-conducteurs (50) et un dispositif de réglage destiné à déplacer le zoom et l'imageur de manière à ce que la surface réceptrice du générateur d'images soit toujours dans le plan focal du zoom, quelle que soit la position de celui-ci. Le dispositif de réglage comprend également le moyen de détecter la position du zoom et de l'imageur le long de l'axe optique de l'endoscope, une table de recherche comprenant les données relatives à la distance à maintenir entre l'imageur et le zoom pour que le plan focal de celui-ci soit largement concentré sur la surface réceptrice de l'imageur dans les diverses positions du système de zoom, le moyen de consulter ces données et le moyen de déplacer le système de zoom et/ou l'imageur en fonction des données consultées.

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