Society of Motion Picture Engineers : incorporation and by-laws (1919)

Page scan 00077 from Society of Motion Picture Engineers : incorporation and by-laws

Record Details:

Title:
Society of Motion Picture Engineers : incorporation and by-laws
Date:
1919
Publisher:
Washington D.C. : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1919)
Leaf #:
00077
Language:
English
Subjects:
motion pictures, Cinematography -- Periodicals
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Preceeded by an unnumbered issue published in 1916 called: Incorporation and by-laws
Date Added:
September 12, 2024
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.

Light bent too sharply as in the case oi the ray aifk is not useful nor would light such as d-g-m collected by an extra ring or reflector outside the condenser serve any useful purpose. Such light, while striking the film, would unnecessarily heat it, and, entirely missing the objective, would never reach the screen. Thus is determined the proper proportion between condenser and objective. POSITION OF THE SHUTTER There has been considerable discussion as to the proper position of the shutter. When the shutter is located in front of the •objective (outside shutter) it is desirable to place it in the narrowest part of the beam. With the arc lamp as an illuminant, there is a restriction in the beam at the position of the condenser image, similar to C in Fig. 4 and this is the preferable position for the Fig. 9 — Apparatus used in testing condensers. This shows the lamp, reflector, condenser, aperture, large objective, and screen placed at the aerial image of the condenser. The dark rings shown in this image do not appear on a screen placed at the usual distance for viewing the pictures. shutter. With the incandescent lamp, however, owing to the closeness of the condenser to the objective, its image is larger than the objective, and the narrowest part of the beam is immediately in front of the objective. This is also illustrated in Fig. 3 where the extreme edge rays of light diverge from the objective as does the lower ray in the illustration. 69