给出描述光波通过傍轴光学系统衍射的柯林斯公式及其逆运算表达式。
Collins formula, which describes the diffraction of light wave passed through a near-axis optical system, and its inverse calculation expression are presented in this paper.
说明：用STL实现简单运算表达式，其中包括加减乘除等，以输入等号为结束标志。
Simple arithmetic expressions, including addition, subtraction, etc. , to enter an equal sign marks the end of the STL.
在我们的四则运算表达式里面我们可以利用继承实行从一元到二元操作符的表示，但它实质上会干扰测试。
In our arithmetic expressions we could have used inheritance to get from a unary to a binary operator node, but that would substantially violate the test.
正如test的手册页指出的，test命令运算表达式参数的值，如果表达式的值是True，就返回零(True)退出值。
As the test man page states, the test command evaluates expression parameters and, if the expression value is True, returns a zero (True) exit value.
正如test的手册页指出的，test命令运算表达式参数的值，如果表达式的值是True，就返回零(True)退出值。
As the test man page states, the test command evaluates expression parameters and, if the expression value is True, returns a zero (True) exit value.
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