Compact wide-angle objective
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United States of America Patent
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Sep 27, 1988
Grant Date -
N/A
app pub date -
Sep 2, 1987
filing date -
Sep 2, 1986
priority date (Note) -
Expired
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Abstract
A wide-angle objective of compact construction and comparatively small diameter has its first lens element formed as a convex negative meniscus and its last or sixth lens element formed as a biconcave construction with the fourth lens element being a thick cemented lens.
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