Fukuvi Chemical Industry Co., Ltd.

Riken Kogyo Inc.

Yuto Usui

Yukihiro Shibao

Kodai Hatakeyama

Tatsuya Yamazaki

A vision guide with a light guiding rod including rope member formed by twisting plural strands; light guiding rod of circumferentially light emitting type being adheringly wound around spiral indentations formed between strands on outer circumference of rope member with core layer made of acrylic-based resin and clad layer made of fluorine-based resin; and light source attached to end portion of light guiding rod, wherein amount of change luminance of light guiding rod in test time over duration of 1000 hours by accelerated weathering tester is contained within range of ±10%; amount of change in each numerical value of chromaticity [x, y] is contained within range of ±0.02; flexural modulus of elasticity of light guiding rod under atmosphere of −20 degrees Centigrade is contained at range of 0.5-5.0×10MPa; rope member is formed by twisting strands at twisting angle from 10°-20°; and spiral indentations are uniformly formed with pitch from 100 mm-200 mm.

Growing community of inventors

Fukui, Japan

Yuto Usui