The marked color contrast between Mars and the bright blue star was easy to discern by eye, but is further enhanced in the picture through the use of a diffusion filter.
火星与明亮的蓝色恒星醒目的颜色对比用肉眼很容易辨认，而这张图用了滤色镜更增强了这种对比。
The reflection holographic filter has ideal filtering property, and can be well used as a kind of elements for eye protection against laser.
反射式全息滤光片具有很好的滤光特性，可作为一种激光防护元件。
The reflection holographic filter has ideal filtering property, and can be well used as a kind of elements for eye protection against laser.
反射式全息滤光片具有很好的滤光特性，可作为一种激光防护元件。
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