另外，为了达到设计上的分辨距离还要有良好的照明和反衬度。
In addition, to obtain the designed resolution distance, GND lighting and good contrast are necessary.
对实时全息图的记录和处理采用了一种可获得高反衬度的新技术。拍摄的成功率高，干涉条纹的反衬度好。
The higher rate of the success for the holographic recording and the higher contrast for the interference fringes have been obtained by this system.
模拟计算结果表明，在共焦系统中利用该掩模可以改变系统的点振幅响应，从而提高分辨率，并增强图像的反衬度。
The computation simulation results show that in confocal optic system this mask can change the point amplitude response. It can improve the resolution, while increase the image contrast.
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