焦点：三、野特性。
Focal spots: III. Field characteristics.
作者信息
Burgess A E
出版信息
Invest Radiol. 1977 Jan-Feb;12(1):54-61. doi: 10.1097/00004424-197701000-00013.
Abstract
Experimental results for focal spot field characteristics are presented. These results do not agree completely with results published by Moores and Roeck but are in agreement with Doi's theory as applied to separable focal spots. A new image plane origin called the principal ray is proposed. The variation of the star test pattern image for separable, symmetric focal spots is described. The equation for the field variation of the RMS equivalent rectangle is presented.
摘要
给出了焦点场特性的实验结果。这些结果与穆尔斯和罗克发表的结果并不完全一致，但与应用于可分离焦点的多伊理论相符。提出了一种称为主光线的新像平面原点。描述了可分离对称焦点的星点测试图案图像的变化。给出了均方根等效矩形场变化的方程。
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