Method for designing diffractive lenses

Details Method for designing diffractive lenses Method for designing diffractive lenses

1997-10-22

1999-11-02

Spyrou, Cassandra

Optical: systems and elements

Diffraction

From grating

359565, 359570, 359900, G02B 2744, G02B 518

Patent

active

059781408

ABSTRACT:
The method for designing a diffractive lens to be formed on a refractive lens is disclosed. According to the method, a function of the diffractive lens is expressed as a polynomial optical path difference function using a height from an optical axis as a variable, a boundary of each zone to be formed is determined based on the optical path difference function, an angle of incidence of a ray on a macroscopic shape of the diffractive lens is determined, a shift, in a direction along the optical axis, corresponding to a unit wavelength of the optical path difference for each zone is determined based on the angle of incidence, an optical path difference to be given by each zone is determined based on the optical path difference function, and then a microscopic shape of each zone is determined.

REFERENCES:
Kinoform Lenses: Sweatt Model and phase Function, published on pp. 31-36 of teh May 5, 1995 issue of Optics Communications 117 (1995).

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