萤火虫复眼光学模型重叠成象的研究与模拟

以北京萤火虫复眼结构与生理参数为依据，基于已知的梯度折射率透镜特征，对复眼的整个光学系统进行模型化.模型的尺寸与折射率分布依据实际晶锥的测量值.通过对模型复眼的光线追迹，证明北京萤火虫复眼是一个折射重叠型复眼.重叠孔径以内入射的平行光线在视网膜水平形成一半宽度为一定值的模糊圈.利用计算机光线追迹模拟了复眼的重叠成象过程，随着象平面与晶锥近端距离的增加，信号光线的数目也逐渐增加，信噪比逐渐提高，在视网膜水平达到最大值.

A Study and Simulation on the Superposition Imaging in the Optical Modeling Compound Eye of Beijing Firefly

The dioptic system of compound eye of Beijing firefly was simulated on the basis of the real parameters measured from it's structure physiology and it's known GRIN lens properties.The size of the model and values of refractive index were based upon the measured values of actual compoune eye.It was proved that the compound eye of Beijing firefly was a refracting superposition eye by the computer ray tracing model of the compound eye.Parallel light rays incident through the superposition aperture were focussed across the clear zone onto the retina and formed a blur-circle with a certain half-width value. The number of signal light rays and the ratio of signal and noise were increased as the distance to the image plane from exocone proxmal tip were increased. The maxtmun was at the retina level.