We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
30
20
10
0.4 0.5 0.6 0.7
DENSITY (of 8OOm//) OF UNMODULATED, UNBIASED AREA
0.8
Fig. 2. Intel-modulation. Unfiltered light of 2900 K tungsten source.
these filters are not part of the standard source.
Kodak Color Compensating Filters are gelatin niters and should be protected from heat as much as possible. Heatabsorbing glasses should be between the light source and the filters and physically separated as much as possible. Additional air-cooling of the filters is desirable and may be absolutely required in some printers.
The color compensating filters are a necessary part of the filter pack for printing sound on Kodachrome films. The capabilities of printed Kodachrome film for sound reproduction are much better than previous investigators1-2 have reported, primarily because so little attention was paid to the color quality of ?the light used in exposing the sound track. The color quality must coordinate the speeds of the three layers or the best sound quality will not be obtained.
Determination of Exposure Conditions for Optimum Sound Quality
Distortion of variable-density prints was determined by the intermodulation
method3 using conditions prescribed by American Standard Z22.51. The negatives employed were sensitometrically normal negatives suitable for printing on black-and-white release positive film. A negative on Eastman Fine Grain Sound Recording Film, Type 5373 was exposed and processed for a gamma of 0.55 and density of 0.55. This negative was printed on Eastman Fine Grain Release Positive Film, Type 7302 and processed to a density of 0.55 and gamma of 2.50.
Variable-area distortion was determined by the cross-modulation test4 with conditions prescribed by American Standard Z22.52. This standard designates a 4000-cycle carrier frequency amplitudemodulated at 400 cycles/sec. The negatives used were prepared on Eastman Fine Grain Sound Recording Film, Type 5372, with a gamma of 3.65 and total diffuse visual density of 2.98. The negatives were printed onto Eastman Fine Grain Release Positive Film, Type 7302 to a gamma of 2.48 and density of 2.0.
A Western Electric RA-1100B Densitometer was used for all density measure
Robert C. Lovick: Sound Tracks on Kodachrome
83