Calvo M L
Biol Cybern. 1986;54(3):201-10. doi: 10.1007/BF00356859.
An exact treatment of the initial field falling on the entrance face of a photoreceptor, so that the scattered field far from the latter vanishes, is presented. Its physical interest and some consequences are discussed. By establishing certain similarities between the behaviour of the photoreceptor as light penetrates into and propagates along, and an optical linear system, it is possible to define a spatial transverse impulse response containing information on the diffraction capability of each individual receptor. The distribution of this function across a transverse plane depends upon the particular form of the refractive index in the photoreceptor. Thus, certain differences are seen to occur between the case of an homogeneous receptor and an inhomogeneous one, for particular values in the degree of inhomogeneity. This fact allows to interpret the presence of inhomogeneities in the photoreceptor structure.
本文提出了一种对落在光感受器入射面上的初始场的精确处理方法，使得远离光感受器的散射场消失。文中讨论了其物理意义及一些结果。通过建立光穿透并沿光感受器传播时其行为与光学线性系统之间的某些相似性，可以定义一个空间横向脉冲响应，该响应包含了每个单独感受器衍射能力的信息。此函数在横向平面上的分布取决于光感受器中折射率的具体形式。因此，对于不均匀性程度的特定值，在均匀感受器和非均匀感受器的情况之间可以看到某些差异。这一事实有助于解释光感受器结构中不均匀性的存在。
