• Go to A Distorted View
of Todd-AO |
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 Distortion
Correcting Printing Process
By Grant Lobban
The process was
originally designed to eliminate keystone distortion,
distortion resulting from using a deeply curved screen,
plus correcting the distortion arising from use of the
extremely wide-angle lenses |
 The
Ethel O’Brien Printer
By Walter P Siegmund
During our big move from Pomfret to Brooklyn many things were found
which were long hidden and forgotten, including more old Todd-AO files and
photos. You will may find the enclosed material of further interest in
connection with the printing of the Todd-AO “Process”. These are
descriptions and original calculations on various ideas about corrective
printing the release prints. |
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 Description
of Todd-AO Mark III Printer Principle
By Dr. Walter P. Siegmund
The problem of
obtaining any given overall frame keystone
correction (K-correction) along with any given droop
while at the same time matching the "intrinsic"
printer keystone requires the control of several
factors in the printing system. The focal length of
the printer lens and the bridge angle determine the
intrinsic keystone. The curvature of field of the
printer lens and the bridge angle determine the
droop. |
 "Oklahoma!"
Printing Operation in the Todd-AO Mark
III Printer
By Dr. Walter P. Siegmund
The
American Optical Company has the responsibility of printing the release
prints of the motion picture "Oklahoma!". In order that this
printing may have the closest supervision, it is planned that, at least
for the initial stages, this printing will be done in the Research
Center in Southbridge. |
 Todd-AO's
Mark III Distortion Correction Printer - A Galley
The Distortion Correcting Printing Process was initially
meant to be an integrated part of the Todd-AO system. It was
originally designed to eliminate three types of distortion,
keystone distortion, distortion resulting from using a
deeply- curved screen, plus correcting the distortion
arising from use of the extremely wide-angle lenses, in both
photography and projection. |
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