Tip #2: Wavefront Mapping Versus Physical Optics in ASAP

asdoptics

A useful ASAP® command for simulating systems where the wavefront is needed is the OPDMAP command. This command is used with a geometric ray trace, and it uses the optical path length of each ray on a surface to determine the shape of the wavefront. This is a traditional technique used in most classical lens design programs.

One example of where this is useful is in the modeling of an interferometer. The wavefronts from the test and reference arms can be calculated independently. One is then subtracted from the other with a COMBINE command. If needed, you can then use the $FCN and MODIFY commands to create a fringe pattern. This is useful because the geometric ray trace is simple to set up and typically traces quickly so you can investigate multiple design changes in a short period of time.

Keep in mind that this approach does not take into account diffraction from apertures, so it is usually best to perform a full physical optics simulation using the ASAP Gaussian beam superposition/decomposition technique, which is covered in depth in BRO's Advanced Wave Optics Tutorial.

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干涉仪模拟的可以看看哦。