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Dear sir!

Please help me. What instruments must I use for desing Rectangular Lens? 

For example I would like to draw and test the https://www.edmundoptics.com/p/27mm-l-x-36mm-w-x-470mm-fl-achromatic-rectangular-lens-grade-1-/635/.

Thenk you!

Dear Belosks,

you can define the edge shape of your lens by adjusting the Surface Aperture by this way :

Surface Properties / Aperture / Aperture Type / Rectangular Aperture

and fill in X-Half Width / Y-Half Width.

Do not forget the aperture of both face of your lens. You could add a pickup from Front lens surface to rear lens surface.

Regards