Abstract

The spectrophotometric data for one thickness of a glass is sufficient for calculating these data for any other thickness by a method here described, using either an ordinary slide rule or a special table. Calculation is made of the thickness required of two special glasses used in combination, one yellow, the other a new type of blue green, for correcting the spectral response of a photronic cell to the spectral luminosity response of the eye.

© 1937 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. F. Kollmorgen, “Light Transmission Through Telescopes,” Trans. I. E. S. 11, 220 (1916).
  2. The Manufacture of Optical Glass and of Optical Systems, (A War Time Problem) Gov’t. Printing Office1921; . Treatment of polished glass surfaces to reduce the amount of light reflected, p. 76.
  3. B. O’Brien, “Photo-Cell Filter Combination with Spectral Sensitivity Approximating the Visibility Function,” J. O. S. A.,  22, 427 (1932).
  4. M. E. Fogle, “New Color Corrected Photronic Cells for Accurate Light Measurements,” Trans. I. E. S.,  31, 773 (1936).
  5. M. E. Fogle, “Application of Photronic Photo-Cell to Chemical Processes,” Trans. Electrochem. Soc.,  69, 443 (1936).
    [Crossref]
  6. W. E. Forsythe, “Present Status of Photometry,” Trans. I. E. S. 31, 181 (1936).

1936 (3)

M. E. Fogle, “New Color Corrected Photronic Cells for Accurate Light Measurements,” Trans. I. E. S.,  31, 773 (1936).

M. E. Fogle, “Application of Photronic Photo-Cell to Chemical Processes,” Trans. Electrochem. Soc.,  69, 443 (1936).
[Crossref]

W. E. Forsythe, “Present Status of Photometry,” Trans. I. E. S. 31, 181 (1936).

1932 (1)

B. O’Brien, “Photo-Cell Filter Combination with Spectral Sensitivity Approximating the Visibility Function,” J. O. S. A.,  22, 427 (1932).

1916 (1)

F. Kollmorgen, “Light Transmission Through Telescopes,” Trans. I. E. S. 11, 220 (1916).

Fogle, M. E.

M. E. Fogle, “New Color Corrected Photronic Cells for Accurate Light Measurements,” Trans. I. E. S.,  31, 773 (1936).

M. E. Fogle, “Application of Photronic Photo-Cell to Chemical Processes,” Trans. Electrochem. Soc.,  69, 443 (1936).
[Crossref]

Forsythe, W. E.

W. E. Forsythe, “Present Status of Photometry,” Trans. I. E. S. 31, 181 (1936).

Kollmorgen, F.

F. Kollmorgen, “Light Transmission Through Telescopes,” Trans. I. E. S. 11, 220 (1916).

O’Brien, B.

B. O’Brien, “Photo-Cell Filter Combination with Spectral Sensitivity Approximating the Visibility Function,” J. O. S. A.,  22, 427 (1932).

J. O. S. A. (1)

B. O’Brien, “Photo-Cell Filter Combination with Spectral Sensitivity Approximating the Visibility Function,” J. O. S. A.,  22, 427 (1932).

Trans. Electrochem. Soc. (1)

M. E. Fogle, “Application of Photronic Photo-Cell to Chemical Processes,” Trans. Electrochem. Soc.,  69, 443 (1936).
[Crossref]

Trans. I. E. S. (3)

W. E. Forsythe, “Present Status of Photometry,” Trans. I. E. S. 31, 181 (1936).

M. E. Fogle, “New Color Corrected Photronic Cells for Accurate Light Measurements,” Trans. I. E. S.,  31, 773 (1936).

F. Kollmorgen, “Light Transmission Through Telescopes,” Trans. I. E. S. 11, 220 (1916).

Other (1)

The Manufacture of Optical Glass and of Optical Systems, (A War Time Problem) Gov’t. Printing Office1921; . Treatment of polished glass surfaces to reduce the amount of light reflected, p. 76.

Cited By

OSA participates in Crossref's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (4)

Fig. 1
Fig. 1

Slide rule with slide reversed and inverted. The slide is set so that the zero of the log scale is opposite 0.92 on the lower scale. The log scale then gives the βt value corresponding to transmission on the lower or number scale, thus transmission 0.92 corresponds to βt=0; transmission 0.82, βt=−0.05; transmission 0.65, βt=−0.15; etc. Some slide rules which are arranged differently may require a little study to find the log and number scales which will give the same results.

Fig. 2
Fig. 2

C, spectral sensitivity of cell; E, spectral sensitivity of eye.

Fig. 3
Fig. 3

F, transmittance of theoretical correction filter for cell; G, transmittance of glass filter calculated to intersect curve F at the three points; 0.48μ, 0.54μ, 0.64μ.

Fig. 4
Fig. 4

B, transmission of blue-green element; Y, transmission of yellow element; G, transmission of the two elements cemented together.

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

C t = C t log 10 transmittance = log 10 C t = β t