The variable reflectance surface consists of a movable frame and a base plate. The frame carries a series of equidistant black (or white) aluminum stripes; the base plate has a pattern of black and white stripes with the same spacing as the stripes. The reflectivity of the device can be varied by a factor of 10, depending on the location of the movable stripes with respect to the fixed stripes. The position of the frame is controlled by a micrometer screw, giving excellent reproducibility of the reflectivity.
REFERENCES
1.
2.
3.
D. Weintraub and V. K. Saxena, in Aerosols and Climate, edited by P. V. Hobbs and M. P. McCormick (Deepak, Hampton, VA, 1988), pp. 185–194.
4.
H. S.
Coleman
, F. S.
Morris
, H. E.
Rosenberger
, and M. J. A.
Walker
, J. Opt. Soc. Am.
38
, 515
(1949
).5.
L. W. Richards, R. Bergstrom, J. R. Manion, and J. O. O’Gara, in Visibility Protection: Research and Policy Aspects, edited by P. S. Bhardwaja (APCA, Pittsburgh, 1987), pp. 218–229.
6.
7.
I. Overington, Vision and Aquisition (Pentech, London, 1976), p. 257.
8.
R. S. Longhurst, Geometrical and Physical Optics (Longman, London, 1973), p. 448.
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© 1990 American Institute of Physics.
1990
American Institute of Physics
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