阐述了抑制塑料透镜变形所采用的注射-压缩成型技术的特点、成型过程及其模具设计的要点；
The characterteristic, molding process of injection-compression molding and the key points of mould design were described.
如果一个体积足够大的星体从一个距离很远的恒星前面经过，那么会产生透镜效果，使那个恒星的光线产生弯曲或变形，这样就能很清楚的看到这个星体。
If a large object passes in front of a more distant background star, it may act as a lens, bending and distorting the light of that star so that it may appear to brighten significantly.
得益于它们的重量，MACS星系就像一个巨大的宇宙镜头，能放大，变形和弯曲经过它们的任何光，和引力透镜的效果一样。
Because of their heft, the clusters act like giant cosmic lenses, magnifying, distorting and bending any light that passes through them - an effect known as gravitational lensing.
对于大口径精密投影光刻制版镜头来说，透镜的应力变形和中心误差对整个系统的成像质量有较大影响。
For big aperture's precision photolithographic plate-making lenses, the stress distortion and centering errors of lenses can make a bad effect on imaging quality.
由于透镜传输时间延迟效应（PTD），飞秒激光脉冲经过空间滤波器产生脉冲波前变形。
Owing to the PTD effect in the lenses of spatial filter, large temporal front distortion of femtosecond pulses occurs in the spatial filter.
由于透镜传输时间延迟效应（PTD），飞秒激光脉冲经过空间滤波器产生脉冲波前变形。
Owing to the PTD effect in the lenses of spatial filter, large temporal front distortion of femtosecond pulses occurs in the spatial filter.
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