Plastic optical fiber

Abstract

The objective of this invention is to provide plastic optical fiber with excellent optical properties, heat resistance, and mechanical strength. The objective is to provide a bar (for example, for side-emitting applications). [Solution] A core containing a polymethyl methacrylate resin, and surrounding the core , a cladding layer having a lower refractive index than the core and containing a transparent fluororesin, and the cladding layer Furthermore, the outermost layer includes a protective layer having a higher refractive index than the cladding layer and containing a transparent resin, A. The absolute value of the difference in the coefficients of linear expansion of each resin contained in the cladding layer and the protective layer is 10 × 10 -5 Plastic optical fiber with a value of / K or less.

Claims

1. A core containing a polymethyl methacrylate resin, and a surrounding element that encloses the core. A cladding layer containing a transparent fluororesin with a lower refractive index, and further outside the cladding layer The core and cladding include a protective layer having a higher refractive index than the cladding layer and containing a transparent resin. The absolute difference in the coefficients of thermal expansion of each resin contained in the layer and the protective layer is 10 × 10 －５ / Below K Plastic optical fiber.

2. The claim states that the visible light transmittance of the protective layer in the wavelength range of 380 nm to 780 nm is 80% or more. The plastic optical fiber described in item 1.

3. The transparent resin that forms the protective layer is an acrylic resin, a fluororesin, or a polyolefin resin. At least one selected from the group consisting of fats, polyester resins, and polyamide resins. A plastic optical fiber according to claim 1 or 2, comprising:

4. The transparent fluororesin contained in the cladding layer has a refractive index measured at 20°C using sodium D line. The plastic according to any one of claims 1 to 3, wherein the ratio is 1.35 or more and 1.48 or less. Optical fiber.

5. At least one end of the plastic optical fiber according to any one of claims 1 to 4 is connected to a light source. Connected fiber optic lighting.

6. A plastic optical fiber, as described in any one of claims 1 to 4, is included in at least a portion of the material. Fiber optic fabric.

7. A plastic optical fiber, as described in any one of claims 1 to 4, is included in at least a portion of the material. Fiber optic knitted fabric.

8. A step of forming a plastic optical fiber according to any one of claims 1 to 4, and the P A process of sandblasting plastic optical fibers, including a side-emitting plastic A method for manufacturing optical fibers.

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