Rosin S, Amon M
Appl Opt. 1972 Jul 1;11(7):1623-9. doi: 10.1364/AO.11.001623.
The preferred modern type of large telescope today is the Ritchey-Chretien form. The field size is aberrationally limited by undercorrected astigmatism and field curvature. A pair of equally and oppositely oriented flat transmittng plates can neutralize either or both of these aberrations locally in the field to restore the image. These plates, relatively inexpensive and positionally noncritical, may be used to extend the available image area by an order of magnitude.
当今大型望远镜首选的现代类型是施密特-卡塞格伦式。视场大小受像散欠校正和场曲的像差限制。一对取向相反且相同的平面透射板可以在视场中局部抵消其中一种或两种像差以恢复图像。这些板相对便宜且位置要求不高，可用于将可用图像区域扩大一个数量级。
