Optical: systems and elements – Having significant infrared or ultraviolet property – Including alternative optical path or optical element
Patent
1994-12-27
1996-08-20
Dzierzynski, Paul M.
Optical: systems and elements
Having significant infrared or ultraviolet property
Including alternative optical path or optical element
359355, 359399, 359421, 359566, G02B 530, G02B 2300
Patent
active
055484395
ABSTRACT:
An infrared refractive reimaging afocal telescope (10) has an objective lens group (12), an eyepiece lens (14), and a switching lens group (16). The system (10) provides a plurality of magnification modes in a compact arrangement. Diffractive surfaces are provided on at least one of the objective lenses and the eyepiece lens. Also, the system (10) utilizes switching lenses (40, 42, 44, 46) to provide magnification changes. The diffractive surfaces provide chromatic aberration correction. The system provides for excellent image quality in all modes using a minimum number of lens elements.
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Denson-Low Wanda K.
Dzierzynski Paul M.
Hughes Aircraft Company
Sales Michael W.
Schuberg Darren E.
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