Single lens telescope
We present a singlet lens that behaves like a telescope, it expands light rays and at the incoming and outgoing the rays are collimated. Therefore we called singlet lens telescope. The analytical model adapts the second surface when the first surface is given, in order that at the output the rays are collimated. We test the model using ray tracing tracking for several input surfaces and the results are quite satisfactory.
physics.optics↗