以下为句子列表：
英文: Abstract: he optical system is an important part of star sensors.
中文: 文摘:光学系统是星敏感器的重要组成部分。
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英文: After experimentally measuring and marking, this instrument's precision reaches 0.5 arcsec, which better satisfies the requirement-normally 2 arcsec the parallel precision of optical system testing.
中文: 经检测标定后平行度测试仪的精度可达到0.5，能够很好的满足检测平行度为创的光学系统的检测。
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英文: Bases on the principle and apptication characteristic of sky screens, the levs and slits for consisting the optical system in sky screens, the function of optical trausformation, as well as the relation ship between them have been discusses in the present
中文: 摘要基于天幕靶的工作原理及现场使用特点，论述了组成天幕靶光学系统的透镜、狭缝、光学变换的功能及相互之间的关系，分析了光学成像透镜的焦距和孔径、狭缝尺寸（长、宽）和位置、光学变换方法等对形成光幕、汇聚光能的作用，以及对探测视场、探测灵敏度、工作稳定性等的影响。
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英文: Finally, a design example of optical system used for smog attenuation testing system is given to illustrate the effect of spherical aberration on the image beam waist.
中文: 最后通过激光羽烟衰减测试系统中聚光光学系统的设计实例说明了球差对高斯光束像方束腰的影响。
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英文: If absolute absorbance measurements are required (i.e. for the measurement of molar extinction coefficients) the entire optical system will have to be calibrated to determine the mean free path length of the cuvette and the cuvette holder.
中文: 如果要求度量绝对吸收度（比如，对分子消光系数的测量），整个光学系统就要经过校准以确定小型管和小型管固定器的平均自由路径。
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