Low secondary color spectrum triplett

Optical: systems and elements – Lens – Multiple component lenses

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G02B 960

Patent

active

051191172

ABSTRACT:
An objective lens system for use with wavelengths in the visible spectrum, has first and second lens groups. The first lens group has one aplanat lens. The second lens group is a doublet. The second lens group is designed to correct for chromatic aberrations introduced by the first lens group. The power of the second lens group is inversely related to the index of refraction of the first lens group and the optical glasses of the lenses of the second lens group are selected to satisfy a novel color correction equation.

REFERENCES:
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patent: 1159233 (1915-11-01), Konig
patent: 1910115 (1933-05-01), Luboshez
patent: 1987878 (1935-01-01), Tronnier
patent: 2416033 (1947-02-01), Warmisham et al.
patent: 2582362 (1952-01-01), Taylor
patent: 2785602 (1957-03-01), Kohler
patent: 4919501 (1990-04-01), Plaot
Herzberger, "Dispersion" and Color Correction in Optical Systems, Modern Geometrical Optics, interscience Publisher, Inc., New York, (1958), pp. 108-146.
"Chromatic Aberration", Kingslake, Lens Design Fundamentals, Academic Press, New York, 1978, pp. 73-92.
Military Standardized Handbook, Optical Design, MIL-HDBK-141, Oct. 1962), pp. 11-13-11-25.
The Melles-Griot Catalog, pp. 1-12 to 1-15 and 5-10 to 5-14, (1988).

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