A variable transmittance is provided to different position on grayscale mask plane and the required diffractive optical elements can be obtained after one-time exposure.
通过灰度掩模平面不同位置处提供可变的透过率，经一次光刻后得到所需的衍射光学元件。
Save current mask to file as a grayscale image.
保存当前蒙板为灰度图像文件。
Save current mask to file as a grayscale image.
保存当前蒙板为灰度图像文件。
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