Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2005-09-27
2005-09-27
Epps, George (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S784000
Reexamination Certificate
active
06950243
ABSTRACT:
Refractive optical systems having first and second lens systems are transmissive to infrared radiation. The first lens system includes one of BaF2and CaF2. An exemplary second lens system includes an optical material selected from at least spinel, MgF2, and aluminum oxynitride. Such exemplary refractive optical systems provide correction of chromatic aberration in multiple wavelength bands.
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Dumont Frank
Wiese Gary E.
Buchanan Ingersoll pc
Epps George
Harrington Alicia M
Lockheed Martin Corporation
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