Silvery fish skin as an example of a chaotic reflector
Silvery fish skin as an example of a chaotic reflector
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DOI：
10.1098/rspa.1995.0144
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发表时间：
1995-12-08
期刊：
影响因子：
--
通讯作者：
McFall, WD
中科院分区：
文献类型：
--
作者：
McKenzie, DR;Yin, YB;McFall, WD
利用鸟嘌呤和细胞质两种光学成分的理想模型研究了鱼皮中的银色反射率。一种结构中，两种成分的厚度在一段时间内随机化，计算出的反射率与毛毛虫科中两个物种的测量反射率非常一致，包括红外行为。现有的基于四分之一波堆叠的想法，要么是调谐到不同的波长，要么是光学厚度随深度的变化，已经被证明是不令人满意的。这种随机或“混沌”的结构通过鱼皮横截面的电子显微镜得到了证实。随机结构是生物系统中光学定位现象的一个例子。
The silvery reflectance in fish skin is studied using an idealized model of the two optical components, guanine and cytoplasm. A structure in which the thickness of both components are randomized over an interval gives a calculated reflectance in good agreement with the measured reflectance of two species in the family Trichiuridae, including the behaviour in the infrared. Existing ideas based on quarter-wave stacks, either tuned to different wavelengths or with a progression of optical thickness with depth, have been shown to be unsatisfactory. The random or 'chaotic' structure is confirmed by electron microscopy of cross sections of fish skin. The random structure is an example of the phenomenon of optical localization in a biological system.