CAJ | 학술논문

以矢量波像差理论为基础，对卡塞格林光学系统的失调像像差特性进行分析，通过分析发现失调的卡塞格林系统不会引入新的像差，只是会导致三阶像差在像面上的分布发生变化，球差在全视场内为常量，彗差零点不再位于视场中心，像散在视场内存在两个零点且不再关于中心视场对称。在校正失调产生轴上彗差的情况下，卡塞格林系统的一个像散零点位于轴上视场，轴上视场的像差接近于零，但是边缘视场的像散依然较大，因此在卡塞格林系统的装调过程中，需要测量多个视场的波像差来确定系统的装调状态。利用CODE V对失调卡塞格林系统的像差在视场上的分布进行仿真，结果表明利用矢量波像差理论可以对失调卡塞格林系统的像差进行定性分析，以提高卡塞格林系统的装调效率。
이시량파상차이론위기출，대잡새격림광학계통적실조상상차특성진행분석，통과분석발현실조적잡새격림계통불회인입신적상차，지시회도치삼계상차재상면상적분포발생변화，구차재전시장내위상량，혜차영점불재위우시장중심，상산재시장내존재량개영점차불재관우중심시장대칭。재교정실조산생축상혜차적정황하，잡새격림계통적일개상산영점위우축상시장，축상시장적상차접근우령，단시변연시장적상산의연교대，인차재잡새격림계통적장조과정중，수요측량다개시장적파상차래학정계통적장조상태。이용CODE V대실조잡새격림계통적상차재시장상적분포진행방진，결과표명이용시량파상차이론가이대실조잡새격림계통적상차진행정성분석，이제고잡새격림계통적장조효솔。
Based on the vector wavefront aberration theory, the misalignment induced aberration′ s characteristic of Cassegrain optical system was analyzed in this paper. It is shown that a misaligned Cassegrain has three residual 3rd aberrations. The 3rd order spherical aberration is constant over the field and the 3rd order coma increases linearly with the field but the zero coma point no longer locates at the field center. Moreover, the astigmatism aberration field in system without symmetric contains two zero astigmatism point, neither of which is necessarily located on the field center of view. It has been demonstrated that a Cassegrain under assembly is only measured to have perfect performance on-axis but not aligned in any significant way, so the measurements of multiple field points for the Cassegrain are required in the process of alignment.