Olympus Corporation

Tadashi Ito

Sho Nakamura

An optical unit includes: a fixing portion including a front frame portion that holds an object-side fixed lens group, a rear frame portion that holds an image-side fixed lens group or an image sensor, and a fixing portion main body formed by using a non-magnetic material; a moving portion that holds a moving lens group and that is arranged on an inner side of the fixing portion main body so as to be slidable with respect to the fixing portion main body; and a voice coil motor configured to move the moving portion along a direction of the optical axis relative to the fixing portion main body, and including a magnetic portion magnetized in a direction intersecting an optical axis of the object-side fixed lens group, and a coil located on an outer side of the fixing portion main body with respect to the magnetic portion.

Optical unit and endoscope

The endoscope apparatus includes an endoscope and a video processor. The endoscope apparatus has a voice coil motor provided in a distal end portion of an insertion portion of the endoscope and having a coil with a resistance component, and a signal wire inserted into the insertion portion and connected to both ends of the coil, detects at least one value of a current supplied to the signal wire and a voltage applied to the signal wire, calculates power consumption of the coil from the at least one value detected and resistance value information of the resistance component, and executes a predetermined process based on the calculated power consumption of the coil and power consumption threshold information.

Endoscope apparatus and image processing apparatus

An optical unit includes: a fixing part including a front frame portion, a rear frame portion, and a fixing part main body; a movable part arranged slidably relative to the fixing part main body; and a voice coil motor including a magnetic portion, and a coil arranged at the fixing part main body and positioned on a radially outer side of the fixing part main body with respect to the magnetic portion, the voice coil motor being capable of moving the movable part relative to the fixing part main body along a direction of the optical axis. A maximum dimension of the fixing part main body in a first direction parallel to a magnetization direction of the magnetic portion is greater than a maximum dimension of the fixing part main body in a second direction perpendicular to the first direction and the direction of the optical axis.

Growing community of inventors

Hachioji, Japan

Tadashi Ito