Optical fiber impulse sensor fabricating method

Optical Fiber Impulse Sensor Fabrication Method FIGS. 1A-1H show a process for fabricating an optical fiber impulse sensor according to the present invention.

[0027] Around the perimeter of a stress concentration sheet 5 shown in FIG. 1A, is extruded and molded a mold material 7a, as shown in FIG. 1B. It should be noted, however, that this invention is applicable even in the case of no stress concentration sheet 5.

[0028] As shown in FIG. 1C, this is followed by mounting the mold material 7a to a lower die lid 51 for pressing and molding. An upper die lid 53 for pressing and molding, which has a protrusion 52 formed in an integral shape of an optical fiber insertion hole 8 and an insertion slit 9 (in the figure, a shape having a substantially keyhole-shaped cross section) is caused to face the lower die lid 51 for pressing and molding.

[0029] As shown in FIG. 1D, the upper die lid 53 is pressed down and fitted on the lower die lid 51, and as shown in FIG. 1E, is then removed upward th