LENS TILT DETECTION DEVICE AND LENS TILT DETECTION METHOD

摘要

The device is equipped with: a plurality of point light sources (21) that are disposed with space therebetween upon a plane perpendicular to a reference axis (m) and that direct light upon a lens to be measured disposed on the reference axis (m); an imaging camera (3) that is disposed on the opposite side of the lens to be measured (L1) in relation to the plurality of point light sources (21) and such that the optical axis matches with the reference axis (m), and that captures a plurality of formed images of the point light sources (21) generated by means of reflected light from the plurality of lens surfaces of the lens to be measured (L1); and lens tilt detection units (4, 5, 6) that detect the inclination angle and inclination direction of the optical axis of the lens to be measured (L1) relative to the reference axis (m) direction on the basis of the relative deviation of the center position of each of the plurality of formed images of the plurality of point light sources (21) captured by the imaging camera (3). As a result, a lens tilt detection device and a lens tilt detection method are provided that can accurately detect the tilt of the optical axis of a lens even in the form of an optical unit in which the lens is embedded in a holder.