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HOME > Encouragement of Learning > My research of optical control has started when I realized "Milk can be transparent."

My research of optical control has started when I realized "Milk can be transparent."

KOIKE, Yasuhiro (Ph.D)

Milk becomes transparent when component particles are made small enough.<br />It looks white only because of scattering of light.

The majority of white materials existing in the world look white because of scattering of light. In other words, white materials can be made white by controlling the size of "impurities," or transparent materials can be made white. High performance plastic optical fiber (POF) was developed based on the principle of the former, while LCD display was developed based on the principle of the latter. With transparency being maintained, refraction index is controlled continually for POF. Primarily, glass has been used as raw material for optical fiber. It was, however, very difficult to connect or split because of its so fine diameter as hair. POF is about 100 times thicker, and hard to break off. Anybody can connect it as if he or she plugs into an outlet. More exactly, it is a functional material, or "smart material," called as Graded-Index POF (GI-POF). The refractive-index distribution is formed by a special polymerization method so that the arrival time of light going straight through the fiber that of light moving through by reflection. With the smart material, optical fiber featuring more than 200 times faster information transmission rate was obtained. It was the world first report to demonstrate that POF could be used for high-speed multimedia.
use a fine adjustment control which was not so far available. As in science fiction, the content written in this page might be transferred, without using letters, to you by irradiating music composed by a light synthesizer, or pulse train of light beam, to your brain in the future.

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