How else can a system be made telecentric in object space?
The RANG operand described above usually works fine. However, to avoid having to use optimization, simply make the thickness of the object some large number, 1E5 for example, and then place the stop on surface 1. Use a pickup solve on the thickness of surface 1 with a -1 scale factor so that the thickness is -1e5, which returns surface 2 to the object. Now, place the thickness of surface 2 to whatever the actual object distance is. Note that if the system is telecentric in object space, the object distance must be finite. The only drawback to this method is that the layout drawings will look strange unless the starting surface is set to “2” instead of the default “0”. Note also that the aperture type should be “Object space N.A.” or “Image Space F/#” for systems telecentric in object space. Dont use the other aperture types.
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