Method for correcting field curvature

Details Method for correcting field curvature Method for correcting field curvature

1994-02-04

1997-10-14

Nguyen, Thong

Optical: systems and elements

Lens

Including a nonspherical surface

359362, 359648, G02B 302, G02B 900

Patent

active

056777973

ABSTRACT:
A method for producing a lens system is provided in which an exact field curvature (EFC) value is determined for at least one principal ray, the EFC value being given by:

REFERENCES:
patent: 4545652 (1985-10-01), Hoogland
patent: 4929071 (1990-05-01), Mercado
patent: 5125064 (1992-06-01), Naselli et al.

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