光学学报, 2006, 26 (6): 909, 网络出版: 2006-06-13
离轴抛物镜准直特性的研究
Study on Collimation Property of Off-Axis Parabolic Mirror
光学仪器 测量与计量 准直仪 矢量方法 离轴抛物镜 准直特性 optical instrumentation measurement and metrology collimator vector method off-axis parabolic mirror collimation property
摘要
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。
Abstract
Reflective off-axis parabolic mirror has been widely used in radiation calibration, broadband target simulation and energy focusing, because it does not produce chromatic-aberration and has bigger available aperture. The basic factors affecting collimating characteristic are off-axis magnitude, effective aperture and emission position on the focal plane of off-axis parabolic mirror. Vector expression is adopted in analyzing the relation between off-axis parabolic parameters and collimation property. Curves for collimation property of the off-axis collimator are given out in three aspects: the emission position on focal plane varied from 0 to 0.05f, the relative aperture D/f varied from 0 to 0.40 and the relative off-axis magnitude h/f varied from 0.1 to 0.5. Analysis results obtained through vector method are validated by CODE V and tally with those from CODE V under the same conditions. The results are helpful to design parabolic collimators.
梁培. 离轴抛物镜准直特性的研究[J]. 光学学报, 2006, 26(6): 909. 梁培. Study on Collimation Property of Off-Axis Parabolic Mirror[J]. Acta Optica Sinica, 2006, 26(6): 909.