Patent ID: 7046351

Claim:
An apparatus for measuring eccentricity of an optical lens, comprising: a rotary lens holder which rotates about a rotational axis thereof while supporting a first lens surface of an optical lens by vacuum aspiration; a first determining device that determines whether a curvature center of a central portion of said first lens surface is positioned on said rotational axis of said rotary lens holder; a second determining device that determines whether a curvature center of a peripheral portion of said first lens surface is positioned on said rotational axis of said rotary lens holder; and an eccentricity detection device which detects an eccentricity of said optical lens with respect to said rotational axis of said rotary lens holder to calculate an eccentricity of a vertex of said first lens surface with respect to the radial center of said optical lens, said eccentricity detection device including a detector having a contact which comes in contact with a rim of said optical lens to detect said eccentricity of said optical lens with respect to said rotational axis of said rotary lens holder.