Integrally molded multi-optical transmission sheet, integrally molded multi-optical transmission sheet connector and method for manufacturing the same

A method for manufacturing an integrally molded multi-optical transmission sheet, the method comprising:

• supplying, by a single extruder, a core material, which is a polymer, to each of a plurality of regions arranged in a row at intervals in a predetermined direction in a T-die;
• supplying a clad material to surround an outer periphery of the core material;
• supplying a coating material to surround an outer periphery of the clad material;
• combining, by the T-die, the supplied core material, clad material, and coating material, and extruding the combined materials integrally and in a sheet shape to form a main surface in the predetermined direction;
• and
• forming an integrally molded multi-optical transmission sheet that includes a sheet-like coated portion formed of the coating material, and a plurality of optical transmission regions having a core region formed of the core material and a clad region formed of the clad material,
• wherein the sheet-like coated portion surrounds the plurality of optical transmission regions at an end portion of the integrally molded multi-optical transmission sheet in a manner that relational positions of the optical transmission regions are determined by the sheet-like coated portion.