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Light through a Glass Ball
This is a simple example modeling the movement of rays through a spherical lens.

Cassegrain Telescope
Here we model a Cassegrain telescope with LensLab, including the primary and secondary mirror objectives. For this example, we combine several component functions into a special function that we call CassegrainTelescope. Within CassegrainTelescope, we use CylinderGraphic to create the telescope's housing shroud.