try opening the attached [login to view URL] file, which demonstrates ray tracing for this simple case. Some screenshots & explanation in the attached Word doc
Hello, I can not open the file can you
describe in more detail the task that you need to fullfill?
I'm well versed in ray tracing and thin lens.
I work in the field of gravitational lenses.
If I can help you I'll be glad to discuss more with you.
Best
Ezequiel