Reel-to-reel imprint system to form weaving guides on fibers

► We developed a reel-to-reel imprint system to process a fiber using a cylindrical mold. ► A press force correction mechanism that suppressed the installation error was built. ► Continuous pressing with a constant force was enabled at a sending speed of 5 m/min. ► We succeeded in thermal-imprinting of weaving guides on the surface of a plastic optical fiber.