1. Measurement of lens characteristics

    Method and apparatus for measuring the following lens characteristics: (a) curvature of the front and back surfaces of the lens; (b) physical thickness; and (c) index of refraction of the lens to determine the front vertex power, back vertex power; and the lens material. In particular, an embodiment of one aspect of the present invention for measuring the index of refraction of the glass includes: (a) a source of a substantially spatially coherent beam of radiation and having a short temporal coherence length; (b) a beamsplitter to provide a sample beam and a reference beam in response to the beam ...
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