F. H. Richardson's bluebook of projection (1935)

Page scan 000144 from F. H. Richardson's bluebook of projection

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000144
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
August 01, 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.

126 RICHARDSON'S BLUEBOOK OF PROJECTION it will do. Block up the automatic fire shutter and project a white light through the hole. Blow smoke into the tiny light beam (projector is not running) and you may see just what area of the lens the beam covers. Probably all of it will be found to enter the lens, which, of course, indicates that all the light passing through the center zone of the film enters the lens and consequently the central portion of the film is fully illuminated on the screen. Exact Size and Shape of Ray Three Inches from Aperture When Condenser is 18 Inches from Aperture. Zone Area A^frc Ly mens %7ckS 1 ,o*n ay 3 J9 fOS Z *o& /3.J .8$ 19. Z 3 .70 fo.o TefaJ l.7f /OP Figure 41 Now place the other "frame" over the aperture, so that the hole will be at one corner of "the aperture instead of at its center. Again blow smoke ■ and observe the condition. If the whole cone of light enters the lens, well and good. If it does not, then it is plainly evident that the light incident upon the outer zones of the film does not all enter the lens and hence there is unevenness