Thanks to the many talented members here, I recently became aware of the free OSLO Edu software package. The software was very intimidating at first, and what I initially learned from the documentation is how little I really understand optics.
However, with the many sample files online, I was able to plough through the menus and come up with what I believe to be a reasonable model of the venerable Edmund 28mm RKE eyepiece. The technical data was obtained by inspecting their Zemax data file and pulling out the pertinent parameters.
However, the generated spot diagrams do not quite look right to me. I created two, one at f6 and one at f10. I expected the tightest spot to be at zero shift focus. That is not the case, so I am sure that I am doing something wrong.
Another thing I would like to do is estimate the apparent field-of-view (AFOV). From what I have discovered so far, is that the AFOV is simply entered as a parameter and there is no way to solve for it.
Hopefully, someone here is knowledgeable enough in both optics and the OSLO program to help me sort things out.
Edited by John Rogers, 23 January 2019 - 11:15 AM.