title: Rapid inspection method for measuring interior tilt and decenter in singlet lens.
abstract: The objective of this study was to present a high-speed, on-line means of measuring interior tilt and decentration in a singlet lens. We propose a noncontact method based on polarized optics, which provides inspection functions for the practical measurement of lenses. The proposed system was used to measure a tilted and decentered lens, and the results of which showed strong agreement with those obtained in theoretical predictions and CodeV simulations. The proposed method provides a wide field of inspection applicable to lenses with a diameter up to 70 mm. Measurement accuracy is of 0.14 deg/pixel in tilt, and 33 μm/pixel in decentration. Inspection time is only 0.78 s.
authors: Mechanical Engineering Department, National Taiwan University, Taipei, Taiwan.
authors: Ching-Yuan
authors: CY
authors: Chang
authors: Chien-Ching
authors: CC
authors: Ma
authors: Kuo-Cheng
authors: KC
authors: Huang
authors: Shih-Feng
authors: SF
authors: Tseng