MISALIGNMENT DETECTOR FOR LENS AND LENS CENTERING AND EDGING MACHINE

• Main Authors: YAMANAKA YOSHIHIKO, SHIMAZU TOSHITAKA
• Format: Patent
• Language: English
• Published: 30.09.2013
• Subjects: DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GRINDING; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; PERFORMING OPERATIONS; POLISHING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a misalignment detector for lens that detects misalignment of the optical axis of a lens being in or after outer circumference processing from the axis and center of rotation of a holder holding the lens, and a lens centering and edging machine with the detector.SOLUTION: A misalignment detector for lens includes a rotary pedestal on which a lens is mounted, a freely rotatable press ring which is provided above the pedestal and holds the lens L on the pedestal with the pedestal 1 when moving down, and an optical measuring instrument which detects the lens tilting on the pedestal by receiving reflected light of a light beam projected on the lens on the pedestal through a center hole of the press ring. The optical measuring instrument images the reflected light of the light beam projected on the lens from above on a two-dimensional image receiving element, and then measures the direction and amount of eccentricity of the reflected light with the reflected light of the projection light at the imaging position.