Abstract

The optical-reduction method of impressing images on emulsion samples for measuring the resolving power of the latter is preferred over the contact-printing method, chiefly for its practical convenience. A description is given of a camera containing a 150-mm f/5 apochromatic telescope objective, which makes 13 exposures to incandescent light on a power-of-two time scale. For materials of high resolving power, another camera is described that accommodates microscope objectives and makes 7 exposures to monochromatic light on any desired time scale. This camera uses distance pieces to position the sample, and the technique of using such pieces is discussed. The methods of making test objects and the precautions required are described.

© 1951 Optical Society of America

Studies in the Resolving Power of Photographic Emulsions. III. The Effect of the Relative Aperture of the Camera Lens on the Measured Value*

Fred H. Perrin and J. H. Altman
J. Opt. Soc. Am. 41(12) 1038-1047 (1951)

Photographic Sharpness and Resolving PowerI. The Design and Performance of an Apochromatic Resolving-Power Camera Objective*

Fred H. Perrin and H. Orlo Hoadley
J. Opt. Soc. Am. 38(12) 1040-1053 (1948)

Use of the Herschel Effect in Improving Aerial Photographs*

Mary Johnson
J. Opt. Soc. Am. 41(11) 748-751 (1951)

Resolving Power of Photographic Emulsions

P. Hariharan
J. Opt. Soc. Am. 46(5) 315-323 (1956)

The Relation of Definition to Sharpness and Resolving Power in a Photographic System*

George C. Higgins and Robert N. Wolfe
J. Opt. Soc. Am. 45(2) 121-129 (1955)