Specification for measuring depth of focus and best focus 焦深与最佳聚焦的测量规范
2.
It can be repeated at different depths of focus to build up a three - dimensional picture 可以在不同的焦点上重复，以建立三维图像。
3.
In the paper a new * . ldw file format to get the data from * . dxf format file is defined for supporting the vectorial model scanning of laser direct writing system . how to increase the depth of focus ( dof ) of optical system is also discussed in this paper when writing pattern on the concave plates 自定义了一种支持* . dxf文件的矢量文件( * . ldw ) ，从而实现了与autocad软件的接口转换，使得系统支持矢量化运行，并且经过对* . dxf文件的转换后，实现了矢量化运行的数据量较小。
