Anastigmatic anamorphic lens
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United States of America Patent
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Oct 30, 2001
Grant Date -
N/A
app pub date -
Mar 10, 2000
filing date -
Mar 17, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An anastigmatic anamorphic lens, in particular for the projection of Cinemascope films, with a high aperture and an anamorphic factor of greater than 1.7. The anastigmatic anamorphic lens comprises a main objective with considerable positive astigmatism. A main objective which might otherwise be unsuitable for projection because of aberration phenomena, in combination with cylindrical afocal attachments, has its image defects supplemented with the typical aberrations of the attachments in such a way as to achieve an optimum overall result.
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