Method and apparatus for measuring lens performance

Details Method and apparatus for measuring lens performance Method and apparatus for measuring lens performance

1992-05-05

1994-08-02

Warden, Robert J.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356125, 356359, G01B 900

Patent

active

053350596

ABSTRACT:
A method and apparatus for lens measurement that provide for a small error of measurement where a light source used for measurement emits a beam of light at a wavelength different from an operating wavelength of a lens to be measured. The spherical aberration of the lens being measured, which occurs at the nonoperating wavelength, is identified and measured. An auxiliary lens is then placed in the path of the light source emitting the beam of light with the nonoperating wavelength to suppress the spherical aberration. This method allows for performance measurements of the lens to be obtained at the nonoperating wavelength without the adverse effects of the spherical aberration which occurred at the nonoperating wavelength.

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patent: 4832489 (1989-05-01), Wyant et al.
patent: 4958931 (1990-09-01), Tatian

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