An Abridged Goniophotometer for Evaluating Projection Screens and other Diffusing Materials

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 78, No. 8, pp. 628–630
Abstract: A complete photometric description of the angular distribution of light reflected or transmitted by any material is given by a goniophotometric curve or curves in which luminance is plotted as a function of reflection or transmission spread angle. However, the determination of these data can be a complicated operation. To allow more rapid and easy evaluation of front-projection screen materials, a simplified abridged version of a goniophotometer has been developed. This instrument compares material at certain preselected significant reflection angles. It has been found to be useful for quickly evaluating almost any sort of diffusing material. In order to make the instrument more versatile, a transmittance attachment has also been designed to permit similar evaluations for transmitting samples. The complete instrument is described and several examples of its use are shown.
Publication Date: 1969-08-01
DOI: 10.5594/J10842
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J10842
Author(s): S. B. SaundersResearch Laboratories, Eastman Kodak Co., Rochester, NY 14650.
J. J. De PalmaResearch Laboratories, Eastman Kodak Co., Rochester, NY 14650.
Copyright: © 1969 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

High-Brightness Projection Screens with High Ambient Light Rejection [Active]
1. Barbrow L. E. , “The metric system in illuminating engineering,” Illum. Eng. , 62 : 638 – 640 , Nov. 1967 . EXTERNAL

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S. B. Saunders and J. J. De Palma; An Abridged Goniophotometer for Evaluating Projection Screens and other Diffusing Materials, Journal of the SMPTE ( Volume: 78, Issue: 8, August 1969); SMPTE, 1969. Available at https://doi.org/10.5594/J10842

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S. B. Saunders and J. J. De Palma; An Abridged Goniophotometer for Evaluating Projection Screens and other Diffusing Materials, Journal of the SMPTE ( Volume: 78, Issue: 8, August 1969); SMPTE, 1969. Available at https://doi.org/10.5594/J10842

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<span class="citation">S. B. Saunders and J. J. De Palma; <cite>An Abridged Goniophotometer for Evaluating Projection Screens and other Diffusing Materials</cite>, Journal of the SMPTE ( Volume: 78, Issue: 8, August 1969); SMPTE, 1969. Available at <a href="https://doi.org/10.5594/J10842" target="_blank" rel="noopener">https://doi.org/10.5594/J10842</a></span>

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<li>
S. B. Saunders and J. J. De Palma; <cite id="bib-10-5594-j10842">An Abridged Goniophotometer for Evaluating Projection Screens and other Diffusing Materials</cite>, Journal of the SMPTE ( Volume: 78, Issue: 8, August 1969); SMPTE, 1969
<span class="doi">10.5594/J10842</span>
</li>