Abstract: The present invention relates to an optical module or the like having a structure which prevents the efficiency in a sleeve securing operation or optical characteristics from deteriorating and improves adhesion durability. In particular, a resin mold portion including an optical device in the optical module according to the present invention is processed into a shape which can directly irradiate the UV-curable resin introduced between the resin mold portion and the sleeve with ultraviolet rays, and a structure for restricting the flow of the resin changing into a flowing state during the sleeve securing operation or a structure for improving the adhesion durability of the sleeve is provided on at least one of the sleeve side and resin mold portion side.

Abstract: An optical waveguide module according to the present invention comprises an optical waveguide substrate having an optical waveguide formed therein, an optical waveguide holder for mounting the optical waveguide substrate thereon, an optical fiber connector supporting an optical fiber therein, and an optical fiber holder for mounting the optical fiber connector thereon, the end faces of the optical waveguide holder and the optical fiber holder are brought into contact with each other while aligning the optical waveguide and the optical fiber, the end faces of the optical waveguide substrate and the optical fiber connector are bonded at least partially through a gap, and a hardening matching agent having a refractive index matching with those of the optical waveguide and the optical fiber is filled in the gap.

Abstract: There is disclosed an adsorbent comprising a macroreticular polystyrene type resin having amino groups selected from the group consisting of primary, secondary and tertiary amino groups and combinations thereof, and a copper(I) halide fixed to the macroreticular polystyrene type resin. Such an adsorbent has been found to be advantageously employed for the selective adsorption-separation of a gas from a gaseous mixture.