Patent ID: 6198575
Filing Date: 2001-03-06
Classification: G02B

Abstract:
An optical system for an observing device having an image-vibration compensation system, said optical system including an objective optical system, an erecting system and an observing optical system arranged in the order from an object side, said objective optical system consisting of:a first lens having positive refractive power, one lens surface of said first lens being an aspherical surface, said first lens being positioned closest to an object side of said objective optical system;a second lens arranged at the erecting system side of said first lens; anda third lens arranged at the erecting system side of said second lens,wherein one of said second and third lens has positive refractive power and the other has negative refractive power, andwherein said first lens is movable in a direction orthogonal to an optical axis of said objective optical system to compensate an image vibration due to a hand-held shake.