以下为句子列表：
英文: Close-up performance of the Summicron-M is on the same level as the performance at infinity setting (actually infinity is that distance where the incoming light rays are parallel to the optical axis.
中文: 近摄表现与无穷远时相当(事实上,无穷远处的光线是平行光轴入射的.对多数镜头而言,大约100倍焦距的物距时,入射光满足这一条件).
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英文: A range in relation to an optical system, such as a camera lens, representing distances great enough that light rays reflected from objects within the range may be regarded as parallel.
中文: （聚焦区）无限远与光学系统（如照像镜头）有关的一个范围，表示距离是如此之远，以至于从在这一距离的物体上反射回来的光可以视为平行光线
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英文: Another effect is caused by the fact that light rays of different wavelengths are not refracted, slowed down, equally.
中文: 另一种现象是不同波长的光线折射程度并不一致。
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英文: Being a point light source the light rays direction on an object surface is given by the line joining the point light source and the point on the surface of the object itself.
中文: 作为一个点光源，光线在一个物体表面上的发射方向使用光源所在点和物体表面点之间的连线来确定的。
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英文: It's like a mirage, where heat causes the bending of light rays and cloaks the road ahead behind an image of the sky.
中文: 实验就象海市蜃楼，在高温下，光线发生弯曲，从而前面的道路就看不见了，而只能看到后面的天空图象。
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