1987-09-02
1988-09-27
Corbin, John K.
G02B 962
Patent
active
047737450
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.
Corbin John K.
Dubno Herbert
Gass Rebecca D.
Jos. Schneider Optische Werke Kreuznach GmbH & Co. KG
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