When testing schemes with collimating lens installed before asymmetrically cut crystal, I found an unexpected behavior: lens widgets that use PreRefl data, followed by asymmetrically cut crystal produce a strange diagonal strike in beam cross-section, which I cannot explain physically. In addition, when using the 'ideal lens' widget instead (but with the same focal distance), the resulting beam cross-section is OK (see also .ows with example here: Test.zip).
When testing schemes with collimating lens installed before asymmetrically cut crystal, I found an unexpected behavior: lens widgets that use PreRefl data, followed by asymmetrically cut crystal produce a strange diagonal strike in beam cross-section, which I cannot explain physically. In addition, when using the 'ideal lens' widget instead (but with the same focal distance), the resulting beam cross-section is OK (see also .ows with example here: Test.zip).