| 摘要 |
PURPOSE: To provide an optical fiber type optical filter where an optical filter chip at the inside of a slit is firmly stuck by using photosetting adhesive whose light transmittance is high and moistureproof performance is excellent. CONSTITUTION: The end parts of a pair of the optical fibers 2 are at least arranged oppositely each other through a slit 7 at the inside of the groove 4 of a substrate having the groove 4 fixing the optical fiber 2, and the optical filter chip 5 having an optical film is arranged at the slit 7. On the other hand, the substrate is constituted of a material having high light transmittance, and the adhesive 6 in the vicinity of the optical filter chip 5 is at least mad to be of thickness which is nearly the same height as the upper surface of the outer periphery of the optical fiber 2 at the fixed part made by the substrate and the optical fiber 2 by the photosetting adhesive 6. |
