OTOTSUKANGOSETSUZOKUNYORUTEIHANSHAGATAHIKARIBUHIN

摘要

PURPOSE:To permit easy and automatic execution of alignment without the need for diagonal working of a lens connecting surface and precision polishing and without a precision aligning operation and to enable an operator to assemble optical parts without requiring highly accurate members and with substantially no need for the special technique by a skilled person. CONSTITUTION:The projecting part 16 where the core part 14 itself projects to a circular conical shape is formed at the front end face of an optical fiber 10 and a recessed part 18 to be fitted thereto is formed at the end face of the lens 12. The projecting part and the recessed part are directly fitted and are fixed by an optical adhesive 20. The lens is, for example, a gradient index rod lens. One of its end faces is formed as a precisely polished surface and the other as a cut surface. The recessed part is formed by hot press transfer of a circular conical presser on the optical axis position of the cut surface. The optical fiber is a glass fiber and its projecting part is formed by etching. The coupled body of the optical fiber and the lens is housed into a cylindrical jacket including a part of the sheath of an optical fiber cable and is adhered and integrated to the jacket only at the part near the sheath end.