Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 261
elevation. The sixth question asks whether con-centration of light on the target anddarkness in other parts of the rangeresulting in the enlargement of the pupilof the eye, has an effect on acuity ofvision (a) of the target, {h) of the sights.Provided that the target is not toobrightly illuminated,… … Fig. 3.—Typical indoor Miniature Range. Fig. 4.—An outdoor Miniature Rifle Range. Showing characteristic difference in the conditions of contrast in the ordinary indoorrange (firing point in complete darkness) and in the case of a similar range out of doors. I will leave the fourth question to…
Lighting
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