Recently, many research and development are on multi focal plane image for head up display.

It needs to build an optical model to simulate the case below:

1. There are two object planes (usually two optical paths);
2. Need to for images on one image plane (eye box)
3. form two or more virtual images in front of a car.

Usually, the sequential lens editor of zemax opticstudio is set for modeling a system with one object plane and one image plane. Could you any experienced staff tell me how to set such a  model for simulating multifocal virtual imaging of Head up display.

Thank you!