Society of Motion Picture Engineers : incorporation and by-laws (1927)

Page scan 000154 from Society of Motion Picture Engineers : incorporation and by-laws

Record Details:

Title:
Society of Motion Picture Engineers : incorporation and by-laws
Date:
1927
Publisher:
New York : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1927)
Leaf #:
000154
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.

144 Transactions of S.M.P.E., August 1927 It will be noted that the minimum density of curve C is appreciablyless than that of curve D, thus the transmission of filter C for the wave-length which it transmits most freely is greater than that of filter D. The filter obtained by increasing the concentration four times is therefore more efficient from the standpoint of high selectivity in absorption characteristics than that obtained by using four layers of film. 3.0 ZJS 2.0 > I 1.5 O 1.0 0^ / V A-* 1^ \ — c 1 i \ / K ^ \vX ^ V K r P^^ 300 400 500 WAVELENGTH 600 700 (m/i) Fig. 4. Spectrophotometric density curves of A red filter, B green filter, and C the green filter obtained by superposing A and B. The expression of the data in the form of density is also most convenient where it is desired to compute the spectral absorption obtainable by the superposition of two or more filters or the use of two or more dyes in the same solution or gelatine film. In the case of the superposition of the two sheets of dyed gelatine or pieces of glass it is only necessary to add at each wave-length the density values as determined directly by the spectrophotometer in terms of Jo and Ix' In case the addition is to be made by incorporating two dyes in the same solution or in the same sheet of gelatine it is apparent th9,t the appropriate correction must be made for any surface reflection factor which may be included in the density values for the individual dye components. In Fig. 4, curve A, is shown the spectro