Characteristics of the thick, compound refractive lens
作者： Richard H. Pantell , Joseph Feinstein , H. Raul Beguiristain , Melvin A. Piestrup , Charles K. Gary
DOI: 10.1364/AO.42.000719
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摘要: A compound refractive lens (CRL), consisting of a series N closely spaced elements each which contributes small fraction the total focusing, can be used to focus x rays or neutrons. The thickness CRL comparable its focal length, whereupon thick-lens analysis must performed. In contrast with conventional optical lens, where ray inside follows straight line, is continually changing direction because multiple refracting surfaces. Thus matrix representation for thick quite different from that lens. Principal planes defined such converted thin For length greater than same curvature, but this lengthening effect less
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