Optical: systems and elements – Diffraction – From grating
Patent
1994-08-17
1996-12-03
Henry, Jon W.
Optical: systems and elements
Diffraction
From grating
359569, G02B 518, G02B 308
Patent
active
055814050
ABSTRACT:
A hybrid refractive and diffractive achromatic lens suited for single-use or inexpensive single-lens cameras operating in visible spectral range. The lens comprises a body of optically transmissive material having an index of refraction at a wavelength approximately at the center of said range of at least 1.45. The lens body having a first and second surface on opposite sides thereof, at least one of said surfaces being curved to provide a refractive portion having power and introduces chromatic aberration, the lens having a diffractive portion having power which substantially achromatizes the lens for the chromatic aberration of the refraction portion over about 440 nm to about 650 nm range.
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Bietry Joseph R.
Meyers Mark M.
Eastman Kodak Company
Henry Jon W.
Short Svetlana Z.
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