McIntyre P, Snyder A W
J Opt Soc Am. 1978 Feb;68(2):149-57. doi: 10.1364/josa.68.000149.
The propagation of light through a slowly twisting anisotropic medium is described by a coupled-mode theory; expressions are derived for the electric field for the case of a birefringent dichroic medium with a constant rate of twist. The method provides a simple and intuitive means for determing the effect of twisting on the linear birefringence and dichroic absorption of the medium, particularly when the light is initially linearly polarized. The theory is well suited to the analysis of light absorption in twisting insect photoreceptors, such as found in bees and ants. We provide full expressions and useful approximations for polarization sensitivity and the initial direction of polarization to give maximum absorption for several types of photoreceptors.
光在缓慢扭曲的各向异性介质中的传播由耦合模理论描述；对于具有恒定扭曲率的双折射二向色性介质的情况，推导了电场的表达式。该方法为确定扭曲对介质的线性双折射和二向色性吸收的影响提供了一种简单直观的手段，特别是当光最初为线偏振光时。该理论非常适合分析扭曲昆虫光感受器中的光吸收，如在蜜蜂和蚂蚁中发现的光感受器。我们给出了几种类型光感受器的偏振灵敏度和初始偏振方向的完整表达式及有用的近似值，以实现最大吸收。
