Patent ID: 6456790
Filing Date: 2002-09-24
Classification: G03B

Abstract:
An image-tremble-correcting system for an optical instrument, having an optical focussing system for producing a focussed image, to correct a tremble of said focussed image caused by an oscillation of said optical instrument, which comprises:a movable optical tremble-correction system assembled in the optical focussing system of said optical instrument; an X-Y rectangular coordinate system which is defined on a geometrical plane perpendicular to an optical axis of said optical focussing system, an origin of said X-Y rectangular coordinate system coinciding with the optical axis of said optical focussing system, the X- and Y-axes thereof defining an angle of 45Â° with a horizontal axis and a vertical axis defined on said geometrical plane when said optical instrument is positioned at a usual attitude; a first position-detecting system that detects a position of said movable optical tremble-correction system along the X-axis of said X-Y rectangular coordinate system; a second position-detecting system that detects a position of said movable optical tremble-correction system along the Y-axis of said X-Y rectangular coordinate system; a first driving system that moves said movable optical tremble-correction system along the X-axis of the X-Y rectangular coordinate system; a second driving system that moves said movable optical tremble-correction system along the Y-axis of the X-Y rectangular coordinate system; a tremble-sensor system that detects an amount of tremble of said focussed image with respect to said X-Y rectangular coordinate system; and a controller that controls said first and second driving system to move said movable optical tremble-correction system along the X- and Y-axes of the X-Y rectangular coordinate system, such that the amount of tremble of said focussed image is neutralized.