35B/16 deformation lens for motion picture film processing machine

The utility model relates to a film printing equipment, especially relates to a printing lens for the film printer, which is characterized in that the ratio between the focal length f1 of the front lens group 1 and the focal length f3 of the back lens group equals 2, that is: f1/f3=2; the deformatio...

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Bibliographic Details
Main Authors BAOQI WANG, CHEN CHEN
Format Patent
LanguageEnglish
Published 16.10.2002
Edition7
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:The utility model relates to a film printing equipment, especially relates to a printing lens for the film printer, which is characterized in that the ratio between the focal length f1 of the front lens group 1 and the focal length f3 of the back lens group equals 2, that is: f1/f3=2; the deformation coefficient is 2; when in working state, the bus of the cylindrical lens of deformation lens group 2 is vertical to the vertical plane. The utility model has an advantage that no wide-screen lens is needed when screening non-deformation wide-screen film; instead, the normal film screening lens can be used, which is convenient for the users.
Bibliography:Application Number: CN2002201939U