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How to manufacture fiber optics -until products are completed. -

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  1. Fiber optics
    There are some kinds of fiber optics.
    Fiber optics we often hear is the one for long distance telecommunication, they are made of ultra pure quartz.
    On the other hand, what we, Sumita manufacture is multi-components fiber optics. They are completely different from the quartz fiber optics used for long distance telecommunications.
    Based on excellent manufacturing technology of optical glass and ultra pure raw material, our multi-components fiber optics are high quality products. They are high cost performance.
    Recently, light guide method by fiber optics is applicable to many kinds of applications such as medical equipment, image processing, measurement, sensor, illumination, etc.
  2. Structure and principle

    Fiber optics are consisted of double structure. One is core which has superior transmission. The other is clad which has durable covering material.
    In this structured fiber optics, once light is put into one end surface, the light transmits into the other end by repeating total reflection in the core.
    Total reflection is phenomenon which light reflects completely within certain angle at the boundary of two different refractive index material. Light transmits by this phenomenon.

    Structure and principle
  3. Raw material
    Fiber optics glass is also one of the optical glass.
    There are some kinds of raw materials due to specifications of fiber optics.
    Raw material is same as the one for optical glass, but the one with much less impurities is used for fiber optics.
  4. Double structure melting pot

    Fiber optics are consisted of double structure, core and clad.
    Because of this reason, the melting pot is also double structure. Core glass is put into inner pot and clad glass is put into outer pot. Then, they are melted at high temperature.
    The two kinds of melted glasses are drawn from the bottom of the pot simultaneously and become single fiber optic.
    Diameter of fiber optics is classified due to the glass temperature and drawing speed, so precise control is required. We manufacture from Dia. 20 µm to Dia. 300 µm due to applications.
    We can manufacture maximum fiber optics of 700,000 km/monthly. This length is equivalent to distance which goes around the earth 17.5 times.

    Double structure melting pot
  5. Completion

    The drawn fiber optics are to be put into from 20, 30 to 200, 300 bundles and to be sheathed by plastic.

    完成の写真
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