Evaluation of transient glare in the scotopic-mesopic range

Elisa M. Colombo; Jose F. Barraza; Luis Issolio

doi:10.1117/12.354855

19 July 1999 Evaluation of transient glare in the scotopic-mesopic range

Elisa M. Colombo, Jose F. Barraza, Luis Issolio

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354855
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

Abstract

This paper proposes a quantitative method for evaluation of disability glare, considering a scotopic-mesopic range and transient glare. Subjects had to compare brightness of two uniform luminance fields sequentially displayed, one of which was presented under glare conditions. The observer reported which field was brighter with respect to one another. A forced choice paradigm using the method of constant stimuli was adopted to determine the luminance corresponding to the perceptual matching luminance. The results show a non linear effect of the glare illuminance on the matching luminance and a non significant dependence with the luminance reference. We propose an empirical equation to calculate the glare effect. Scattered light can explain the results considering simultaneous contrast.

Citation Download Citation

Elisa M. Colombo, Jose F. Barraza, and Luis Issolio "Evaluation of transient glare in the scotopic-mesopic range", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354855

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