In this paper, a generated method of 2-d binary phase grating by chemistry etching is presented.

本文介绍用化学蚀刻的方法制作二维二元位相光栅。

youdao

The so called binary system, 1 these zeros and ones that you'd probably have some vague sense underlie all computers today actually reduced to the exact same grade school kind of math and system except with computers, 1 because it's a lot easier to use just two digits, zero and one.

所谓的二进制就是，你觉得模糊的0与,在电脑上计算,事实上可以简化为跟小学数学一样,只是在电脑上计算而已，因为它更容易，仅仅使用两个数字，0与。

哈佛公开课 - 计算机科学课程节选