Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000495
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




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.

492 BAIRD AND DURIE November The ten small lenses are ordinary achromats, each with a clear aperture of 0.055 inch and a focal length of 0.5 inch. When placed side by side the ten occupy a distance of only 1 inch. The slot widths, the clear apertures of the lenses, and the lens spacings are such that the total exposure time of each lens is equal to the reciprocal of the picture rate. In the optical tube (14) there is a photographic shutter (59) which can be adjusted to stay open during a single revolution of the film drum thus preventing the reimposition of images on film area that has already been exposed. Fig. 3 — A cross-sectioned view showing the engineering details of the camera. The previously mentioned enlarging lenses consist of a Ross "Xpres" 4-inch wide-angle lens and a Cooke-process anastigmat placed end to end. This pair of lenses enlarges the primary images by three times. Two grooved rings hold the piece of film against the inside of the film drum. The film is 39 inches long by 3 inches wide and holds a total of 1300 frames. Fig. 3 is a sectional view illustrating the mechanical details of the machine. The upper chamber contains the slotted disk (24) mounted on a shaft which turns on two precision ball bearings. Also mounted on the shaft is the gear (30) which meshes with the two gears (31),