We propose an optical apparatus enabling the measurement of spherical power, cylindrical power, and optical center coordinates of ophthalmic lenses. The main advantage of this new focimeter is to provide a full bidimensional mapping of the characteristics of ophthalmic glasses. This is made possible thanks to the use of a large-area and high-resolution position-sensitive detector. We describe the measurement principle and present some typical mappings, particularly for progressive lenses. We then discuss the advantages in terms of speed and versatility of such a focimeter for the measurement of complex lens mappings.
© 2002 Optical Society of America
(040.5160) Detectors : Photodetectors
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
Kondo Gnanvo, Zong Yan Wu, Jean-Louis de Bougrenet de la Tocnaye, and Liren Liu, "Large-Aperture Automatic Focimeter for the Measurement of Optical Power and Other Optical Characteristics of Ophthalmic Lenses," Appl. Opt. 41, 5997-6005 (2002)