We generalize earlier work on intrinsic and form birefringence for random distributions of aligned ellipsoids by taking the minimum separation of particle centers (the exclusion-correlation surface) as nonsimilar to the particle’s surface. For such cases, the bulk parameters involve a compound depolarization factor consisting of two distinct terms, one corresponding to particle shape (<i>S</i>) effects, and the other to configurational-correlation (<i>C</i>) effects. The associated bipolarization and birefraction expressions show form (<i>F</i>) effects in which <i>S</i> and <i>C</i> may either compete (and even cancel) or else reinforce. If they compete (e.g., for coaxial spheroidal particle and exclusion surfaces, both prolate or both oblate) then the <i>F</i> effects are less than the <i>S</i>; if they reinforce (coaxial spheroids, one prolate and one oblate) then the <i>F</i> effects are greater than the <i>S</i>. We show how the earlier explicit results for similar <i>C</i> and <i>S</i> can be generalized by inspection, and illustrate the procedure for key forms.
© 1979 Optical Society of America
Victor Twersky, "Intrinsic, shape, and configurational birefringence," J. Opt. Soc. Am. 69, 1199-1205 (1979)