Abstract

The problem of designing nonpolarizing beam splitters with as broad a spectral band as practical has not been clearly understood. The effort of the work reported here has been to glean understanding from the various results of a contest for such designs and further studies of what might be the underlying principles and behaviors that are involved in such designs. A few key layer patterns have been observed, and the importance of symmetry in these patterns has been discovered. Four-layer building blocks have been found that relate to the two quarter-wave optical thickness pairs used as building blocks in normal- incidence designs.

© 2008 Optical Society of America

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