ECCENTRICITY MEASUREMENT METHOD, LENS FABRICATION METHOD, AND ECCENTRICITY MEASUREMENT DEVICE

• Main Authors: MAEDA ATSUSHI, MIYASATO KENICHI
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2020
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

To provide an eccentricity measurement method for quickly and accurately measuring inter-surface eccentricity of a lens under inspection, and to provide a lens fabrication method and an eccentricity measurement device.SOLUTION: An eccentricity measurement method is provided, comprising: a formation step for splitting light reflected from first and second surfaces of a lens under inspection using a plurality of optical elements 2a to form a first spot group SP1 and a second spot group SP2; and an eccentricity computation step for computing an eccentricity amount of the first surface with respect to the second surface on the basis of the first spot group and the second spot group.SELECTED DRAWING: Figure 3 【課題】被検レンズの面間偏心を高速かつ高精度に計測する偏心計測方法、レンズ製造方法、および偏心計測装置を提供すること。【解決手段】偏心計測方法は、被検レンズの第１面および第２面からの反射光を複数の光学素子２ａで分割して第１スポット群ＳＰ１および第２スポット群ＳＰ２を形成する形成ステップと、第１スポット群および第２スポット群に基づいて第２面に対する第１面の偏心量を算出する偏心算出ステップと、を有する。【選択図】図３