Four component zoom lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 25, 1986
Grant Date -
N/A
app pub date -
Feb 2, 1983
filing date -
Feb 2, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A zoom lens in which two pairs of optical elements of the lens are each movable simultaneously relative to each other to attain desired magnification while maintaining the image surface of the lens system substantially fixed. A common body supporting both sets of lens elements can be moved if required to maintain the focal plane of the lens system fixed. The need for moving the body may arise where the movement of the lens elements causes a shift or displacement of the focal plane of the zoom lens.
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Family
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Cited Art Landscape
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