Third Dimension Movies And E X P A N D E D Screen (1953)

Page scan 00062 from Third Dimension Movies And E X P A N D E D Screen

Record Details:

Title:
Third Dimension Movies And E X P A N D E D Screen
Date:
1953
Publisher:
Cameron Publishing Company
Volume:
Third Dimension Movies And E X P A N D E D Screen
Leaf #:
00062
Language:
English
Collection:
Books
Format:
Books
Contributor:
Universal Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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THREE-DIMENSIONAL MOTION PICTURES of light Is partially intercepted by a keen edge or is made to pass through either a narrow slit or a small opening the phe nomenon of diffraction takes place. If the pin hole of the camera obscura is so small that diffrac tion is provoked, the sharpness of the image is greatly impaired. A lack of definition will also be the result from a pin hole of too great an area. Let o be the orifice of the camera obsolra, I l f the object and s s' its image. The pencil of rays emanated by the object point I, which may enter the orifice o, assumes a conical form and therefore, instead of producing at s the exact image of the point I it produces a circle, the size of which is dependent upon the size of the opening and the image distance. The axis indi cates the path of the principal ray and the center of the circle while the marginal rays will trace the circumference of the circle. If the size of the opening is so calculated that it is as small as possible without creating a disturbing amount of diffraction this small patch of light will then represent the best obtainable image of the object point /.