Stress-induced focal splitting.
Under circularly polarized illumination, a trigonal birefringence pattern produces concentric rings of alternating right and left circular polarization. When a window with trigonal stress is placed in the pupil of an imaging system, the birefringence induces an axial splitting of the focus. We analyze and experimentally test this phenomenon and discuss applications to optical imaging.
Spilman
Alexis K
AK
Brown
Thomas G
TG