Apochromatic lens

Details Apochromatic lens Apochromatic lens

2011-08-30

2011-08-30

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Selective wavelength transmitting or blocking

C359S793000

Reexamination Certificate

active

08009369

ABSTRACT:
An apochromatic lens with an aperture and exclusively refractive optical elements, comprising a plurality of lenses arranged in lens groups along an optical axis, wherein lenses of different materials are provided and wherein the lenses respectively comprise one of the following listed materials: calcium fluoride (CaF2), synthetic quartz (SiO2) or another radiation-resistant optical material.

REFERENCES:
patent: 2520633 (1950-08-01), Grey
patent: 2578624 (1951-12-01), Back et al.
patent: 3306695 (1967-02-01), Baker
patent: 4915483 (1990-04-01), Robb
patent: 4955701 (1990-09-01), Kataoka et al.
patent: 5305138 (1994-04-01), Freedenberg et al.
patent: 7271965 (2007-09-01), Oskotsky et al.

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