Refractive index distribution measuring method, refractive index distribution measuring apparatus, and optical element manufacturing method

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United States of America Patent

PATENT NO 9709490
APP PUB NO 20160161403A1
SERIAL NO

14959878

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Abstract

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A test unit is formed by sandwiching a test lens by a first reference lens whose shape and refractive index are known, a second reference lens whose shape and refractive index are known, and a medium. A wavefront of light transmitted through the test unit is measured, and, by using the shape and the refractive index of the first reference lens, the shape and refractive index of the second reference lens, and the measured wavefront of the test unit, the refractive index distribution of the test lens is calculated.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sugimoto, Tomohiro Yoshikawa, JP 56 520

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