Patent Number: 6,685,631

Title: Electronic endoscope system having variable power function

Abstract: To provide an electronic endoscope system provided with an objectiveoptical system for optically magnifying an image to be observed by using avariable power lens and an electronic zoom IC circuit for electronicallymagnifying an image obtained by a CCD. A depth of field at the time ofswitching between optical variable power and electronic variable power isset at an arbitrary value by key operation etc. of a control panel of aprocessor. When the depth of field becomes a setting value, for example,16 mm (lens position before Near end), during the operation of opticalvariable power based on the operation of a variable power switch,electronic variable power is executed by the electronic zoom IC circuit.Thereby, an enlarged image in which the depth of a subject to be observedwith irregularities is properly in focus can be obtained.

Inventors: Minami; Itsuji (Saitama, JP)

Assignee:

International Classification: A61B 1/00 (20060101); A61B 001/05 ()

Expiration Date: 02/02016