Variable ratio anamorphic lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 30, 2001
Grant Date -
N/A
app pub date -
Sep 8, 1999
filing date -
Sep 8, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An anamorphic lens attachment to be used in conjunction with a basic lens. The attachment provides a variable anamorphic ratio. The attachment comprises a first lens group having positive refractive power in a first direction, a second lens group having negative refractive power in the first direction, and a third lens group having positive refractive power in the first direction. The second lens group is movably located between the first lens group and the basic lens. The third lens group is located between the second lens group and the basic lens at a fixed distance from the first lens group. The lens groups of the attachment have neutral refractive power in a second direction substantially perpendicular to the first direction.
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