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Recent developments
18 Autocollimating focus sensor for optical systems of high angular resolution, J. R, V.l,ce 131 Basic theory of multilayers. The. .4. Thetford 12 Carbon dioxide lasers-an introduction to their characteristics and design, C. R. Stanley 229 Critical adjustments of correlation filters for optical character recognition. A. Dickhlson & 13. M. Watrasiewicz t)8 Design and construction of kaleidoscopes to modify the energy distribution in the image plane of the AWRE arc image furnace, The. A, G. Hunt 211 Experimental technique for the measurement of tile speed of tile rolling elements in a roller bearing using a laser velocimeter, An
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