Sullivan D L
Appl Opt. 1972 Sep 1;11(9):2028. doi: 10.1364/AO.11.002028.
An analytical expression is derived for the alignment of optical elements, such as the Dove or Pechan prism, that are used to rotate optical images. Improper alignment is characterized by a nutation of the system boresight as the prism is rotated. An analytical description is developed for this nutational boresight error in terms of specific misalignments between the prism, mechanical, and optical axes. This error is shown to be similar in form to that given by a mathematical expression commonly known as thelimacon of Pascal. Unique nutation patterns are noted by which one can distinguish and measure specific misalignments. Proper alignment is seen to involve both lateral and angular adjustments. Appropriate adjustment axes are chosen, and suitable alignment procedures are developed.
推导了用于旋转光学图像的光学元件（如道威棱镜或佩琴棱镜）对准的解析表达式。对准不当的特征是随着棱镜旋转，系统视轴出现章动。针对这种章动视轴误差，根据棱镜轴、机械轴和光轴之间的特定不对准情况，建立了一种解析描述。结果表明，该误差的形式与通常称为帕斯卡蚶线的数学表达式所给出的误差相似。注意到了独特的章动模式，通过这些模式可以区分和测量特定的不对准情况。可以看出，正确的对准涉及横向和角度调整。选择了合适的调整轴，并制定了合适的对准程序。
