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由于反射式离轴抛物镜不产生色差并具有较大的有效孔径,已经广泛应用于辐射校准、宽波段的目标模拟和能量聚焦工作中。影响离轴抛物镜准直特性的主要因素有离轴量,有效孔径和焦面出射点的位置。采用矢量的方法,分析了离轴量等参量和准直性能之间的关系。给出了焦面出射点的位置从0~0.05f,相对孔径D/f从0~0.40,相对离轴量h/f从0.1~0.5变化时,离轴抛物镜准直仪的准直性能曲线。运用CODE V对矢量法的分析结果进行了验证,在条件一致的情形,两者结果吻合。这些结果有助于准直仪的设计。
Because the reflective off-axis parabolic mirror does not produce color difference and has a larger effective aperture, has been widely used in radiation calibration, wide-band target simulation and energy focusing work. The main factors affecting off-axis parabolic collimation characteristics are the off-axis amount, the effective aperture and the position of the exit point of the focal plane. Using the vector method, the relationship between off-axis parameters and collimation performance was analyzed. The collimation performance of the off-axis parabolic collimator is given when the position of focal point exit point is from 0 ~ 0.05f, the relative aperture D / f is from 0 ~ 0.40 and the relative off-axis h / f varies from 0.1 ~ 0.5 curve. The results of the vector method were verified by using CODE V. The results of the two methods agree well with the same conditions. These results contribute to the collimator design.