Optical objective
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United States of America Patent
Stats
-
Jun 16, 1981
Grant Date -
N/A
app pub date -
Oct 16, 1979
filing date -
Oct 18, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical objective, usable for reproduction as well as for photographic and cinematographic purposes, consists of five components--two on the object side and three on the image side of a diaphragm space--constituted by a total of seven meniscus-shaped lenses all of whose surfaces are concave toward the diaphragm space, the first object-side component and the middle image-side component being negatively refracting doublets. The objective is bodily movable for focusing purposes and its two object-side components are correlatedly axially shiftable to minimize aberrations over a wide range of magnification ratios.
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International Classification(s)
Cited Art Landscape
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