Mechanism of variable structural colour in the neon tetra: quantitative evaluation of the Venetian blind model
Mechanism of variable structural colour in the neon tetra: quantitative evaluation of the Venetian blind model
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DOI：
10.1098/rsif.2010.0253
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发表时间：
2011-01
影响因子：
3.9
通讯作者：
Shinya Yoshioka;B. Matsuhana;S. Tanaka;Yasushi Inouye;N. Oshima;Shuichi Kinoshita
中科院分区：
文献类型：
--
作者：
Shinya Yoshioka;B. Matsuhana;S. Tanaka;Yasushi Inouye;N. Oshima;Shuichi Kinoshita
霓虹灯四元体的结构颜色与蝴蝶翅膀和鸟羽毛的结构颜色不同，因为它可以根据周围环境的光强度而变化。这一事实清楚地表明了产生颜色的微观结构的可变性。人们已经知道，一个虹膜团含有几层周期性排列的反射光的血小板，这可以引起多层光干涉现象。作为颜色变化的一种机制，人们提出了威尼斯盲模型，该模型假设在颜色变化过程中反射光的血小板倾斜，导致血小板之间的间距发生变化。为了定量地评估该模型的有效性，我们对虹膜内的一堆血小板进行了详细的光学研究。特别是，我们制备了一种新的光学系统，可以同时测量反射光的光谱和方向，这在威尼斯盲模型中有望密切相关。实验结果和详细的分析对模型进行了定量验证。
The structural colour of the neon tetra is distinguishable from those of, e.g., butterfly wings and bird feathers, because it can change in response to the light intensity of the surrounding environment. This fact clearly indicates the variability of the colour-producing microstructures. It has been known that an iridophore of the neon tetra contains a few stacks of periodically arranged light-reflecting platelets, which can cause multilayer optical interference phenomena. As a mechanism of the colour variability, the Venetian blind model has been proposed, in which the light-reflecting platelets are assumed to be tilted during colour change, resulting in a variation in the spacing between the platelets. In order to quantitatively evaluate the validity of this model, we have performed a detailed optical study of a single stack of platelets inside an iridophore. In particular, we have prepared a new optical system that can simultaneously measure both the spectrum and direction of the reflected light, which are expected to be closely related to each other in the Venetian blind model. The experimental results and detailed analysis are found to quantitatively verify the model.