通光孔径

实验测试结果表明，短程透镜在通光孔径8mm内消球差，对4mm宽的平面波束，焦距20mm的短程透镜，其焦点束斑宽度小于4μm。

Measurements show that the lens has no spherical aberration across the total effective aperture of 8 mm , and for a 4 mm-width beam and a lens with 20 mm focal length , the width of the focus is about 4 μ m.

根据数值模拟结果及系统对热效应和通光孔径的要求，给出了实际应用板条的参考尺寸。

Based on results of numerical simulation and requirements of the system on thermal effect and aperture , a reference size for applicable slab was given .

伴随着通光孔径的增加，球透镜的衍射焦斑强度分布增大，衍射的强度减小；直径为0.8mm的球透镜最大耦合效率为62.5%。

The light intensity distribution of ball lenses diffraction facula is increasing and light intensity is decreasing during increasing the beam aperture and the maximum coupling efficiency is 62.5 % .

由于有较大的通光孔径和入射角孔径，AOTF在成像光谱的应用领域有着很大的潜力，但由于TeO2材料的色散造成的图像漂移和模糊问题，阻碍了应用的发展。

Because of the large light and angle aperture , AOTF has quite wide potential in spectral imaging field . While since the TeO_2 has natural dispersion , it will cause scene shift and imaging blur , and hence hinder the application in imaging field .

因此，伴随着通光孔径的增加，球透镜的衍射焦斑强度分布增大，衍射的强度减小。

Consequently , diffraction intensity distribution of ball lens is increasing and diffraction intensity is decreasing during increasing the beam aperture .

确定光斑形状和大小、光学系统有效通光孔径、视场和焦距等参数是进行星敏感器光学设计的前提。

Determination of the optical system parameters such as the spot shape and size , the effective aperture , the field of view and the focal length is the precondition to perform optical design of the star sensor .