| 摘要 |
PURPOSE:To improve reliability to mechanical vibration, etc. by etching the end of optical fibers to concave shape by an etching solution and mounting and bonding spherical lenses of a diameter equal to or larger than the diameter of the inside wall cylinder of the concave portions into the concave portions. CONSTITUTION:The end of an optical fiber composed of a core 1, a clad 2 and a starting quartz pipe 3 is etched by a hydrofluoric acid and a spherical lens 5 is mounted in the concave portion thus formed and is bonded and fixed by an adhesive agent 5. The spacing between the spherical lens 4 and core 1 is made specified value through etching operation. These optical fibers 11, 11' are mounted to the connector in such a manner that the spherical lenses 13, 13' are on a straight line and the fibers 11, 11' are fixed to the jacket by means of adhesive agents 17, 17'. The value of x is so determined that the incident light from the optical fibers 11, 11' is emitted as parallel luminous fluxes by the spherical lenses 13, 13'. Since the spherical lenses and fibers are integrated, they do not receive the influence of vibration and the reliability is high. |
