Patent ID: 9529208
Filing Date: 2016-12-27
CPC Classification: G02B

Claim Text:
1. An image stabilizer applicable to a binocular optical system that comprises an erecting prism placed between an objective lens and an eyepiece, which image stabilizer compensates for deterioration in a quality of an observed image caused by hands movement of a user, the image stabilizer comprising: a gimbal suspension system fixed to a case in which the objective lens and the eyepiece are fixed, comprising pivot shafts respectively extending to left and right sides of an optical axis of the binocular optical system, which passes through the objective lens and the eyepiece, wherein the pivot shafts have a common pivot axis perpendicular to the optical axis, and one gimbal suspension system is disposed in each optical axis of the binocular optical system; wherein the gimbal suspension system comprising an erecting-prism holder for holding the erecting prism, the erecting-prism holder supported by the pivot shafts so as to be pivotable around the common pivot axis; an angular velocity detector, fixed to the erecting prism or the erecting-prism holder, for detecting an angular displacement of the erecting prism caused by the hands movement; and a voice coil motor for pivoting the erecting-prism holder; the voice coil motor placed off the common axis); wherein the voice coil motor comprises: