Is it possible to arrange two off axis parabolic mirrors (OPAs) to transform the emitted rays of a point source into a collimated beam, as in the figure below?
That is, similar to a Keplerian telescope, but achieved with mirrors and not lenses.
EDIT: I want to desing an optical system that takes a point souce and collimates it to a beam of specific width, given that optics manufacturers (ThorLabs, Edmund, Newport) have OPA mirrors with foci at only discrete, large steps. Of course, lenses can do that as well but I want to avoid chromatic abberations, therefore the use of mirrors.
As is well known, a parabolic mirror can focus a collimated beam to a point at the parabola's focus. I came up with the following two configurations, which are somewhat similar, but not identical to the one I mentioned above:
Figures created with the help of ricktu288's simulator.
It seems to me that to achieve the "Keplerian telescope", I need to position the point source not at the focus of the parabolic mirror. But I would like to ask for help with finding this point.
Any help is much appreciated!
