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AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsKoichi Maruyuma, Syun'itirou Wakamiya, Makoto Iwaki
Estimating the term…
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.
A method of measuring the performance of a lens designed for operation with light of an operating wavelength, said method comprising the steps of passing measurement light at a measurement wavelength different from said operating wavelength through said lens, adjusting a wavefront curvature of said measurement light such that said lens will produce a spherical aberration substantially equal to the spherical aberration which would be produced for light at said operating wavelength, and measuring the performance of said lens in accordance with the light passed through said lens.
A method for measuring the performance of a lens to be measured comprising the steps of:
An apparatus for measuring the performance of a lens comprising:
Dependencies are inferred from the claim text.