Abstract

The authors have made investigations with Super XX film and find that the resolving power in white light is strongly influenced by the shape and size of the blue and red images. The results indicate that if the imaging characteristics of a lens in white light are to be determined photoelectrically they should be done in at least three wavelength regions. As a by-product of the experiments it was found that the low-contrast resolving power correlated fairly well with subjective picture evaluation.

© 1954 Optical Society of America

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References

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  1. W. Herriott, J. Opt. Soc. Am. 37, 472 (1947).
    [Crossref]
  2. O. H. Schade, RCA Publication No. ST-3BD.
  3. R. V. Shack and F. E. Washer, J. Opt. Soc. Am. 42, 874 (1952).
  4. Otto Sandvik and George Silberstein, J. Opt. Soc. Am. 17, 107 (1928).
    [Crossref]
  5. C. E. Mees, Theory of the Photographic Process (Macmillan Company, New York, 1942), p. 901.
  6. , Contract DA36-039sc-208. Work summarized in paper 13, “Optical image evaluation,” National Bureau of Standards Circular526 (1954).

1952 (1)

R. V. Shack and F. E. Washer, J. Opt. Soc. Am. 42, 874 (1952).

1947 (1)

1928 (1)

Herriott, W.

Mees, C. E.

C. E. Mees, Theory of the Photographic Process (Macmillan Company, New York, 1942), p. 901.

Sandvik, Otto

Schade, O. H.

O. H. Schade, RCA Publication No. ST-3BD.

Shack, R. V.

R. V. Shack and F. E. Washer, J. Opt. Soc. Am. 42, 874 (1952).

Silberstein, George

Washer, F. E.

R. V. Shack and F. E. Washer, J. Opt. Soc. Am. 42, 874 (1952).

J. Opt. Soc. Am. (3)

Other (3)

C. E. Mees, Theory of the Photographic Process (Macmillan Company, New York, 1942), p. 901.

, Contract DA36-039sc-208. Work summarized in paper 13, “Optical image evaluation,” National Bureau of Standards Circular526 (1954).

O. H. Schade, RCA Publication No. ST-3BD.

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Figures (14)

F. 1
F. 1

Resolving power for several focus settings at f/2.5, f/4, f/5.6. Taken with 7-in. Aero Ektar in green light. Focal settings were spaced by 80 microns.

F. 2
F. 2

Film resolution for high- and low-contrast targets on Super XX panchromatic film using white light, at several positions of focus spaced by 165 microns.

F. 3
F. 3

High-contrast resolution in white light as measured on film compared to resolution predicted from spot sizes measured in red, blue, and green light. The red, green, and blue images were weighted in the following ratios 22 percent red, 35 percent green, 43 percent blue.

F. 4
F. 4

Spot diameters at several focal settings for several percent energy levels. The curves are for f/2.5, f/4, f/5.6 reading from the top down.

F. 5
F. 5

High-contrast resolution compared with resolution predicted from spot sizes. Same as Fig. 3, except for use of 20 percent spot size. Color weighting: 22 percent red, 35 percent green, and 43 percent blue.

F. 6
F. 6

Energy distribution curves for one of three images with similar high-contrast resolution.

F. 7
F. 7

Energy distribution curves for second of three images with similar high-contrast resolution.

F. 8
F. 8

Energy distribution curves for third of three images with similar high-contrast resolution.

F. 9
F. 9

High-contrast resolution. Same as Fig. 5 with the following color weighting: 50 percent red, 15 percent green, and 35 percent blue.

F. 10
F. 10

Same as Fig. 9 with color weighting 50 percent red, 0 percent green, and 50 percent blue.

F. 11
F. 11

Low-contrast resolution as compared to resolution predicted from 50 percent spot size using color weighting, 22 percent red, 35 percent green, 43 percent blue.

F. 12
F. 12

Same as Fig. 11 using color weighting 50 percent red’ 15 percent green, and 35 percent blue.

F. 13
F. 13

Comparison between low-contrast resolution measured on the film and resolution estimated from picture quality.

F. 14
F. 14

Comparison between high-contrast resolution measured on the film and resolution estimated from picture quality.

Tables (1)

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Table I Comparison of spot sizes (in microns) between two images with identical resolving power.

Equations (4)

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R P = 600 ( d e 2 d f 2 ) 1 2 ,
R P = K / ( d c 2 + d f 2 ) 1 2 .
Low-contrast resolution 9.0 12.6 15.5 17.5 22 24 .
High-contrast resolution 24 29 32 35 .