Abstract: A refractive-index imaging material which includes a binder made of either of a copolymer having acrylic epoxy, chain epoxy, organic denatured silicone, and ethylene unsaturated compound having a hydroxyl group in its end in the building block of the copolymer and a copolymer having any one of ethylene unsaturated compounds containing silicone in the building block of the copolymer, a photosensitive monomer made of a mixture including multifunctional acrylate or multifunctional methacrylate and an ethylene unsaturated monomer containing an aromatic ring or halogen and a photopolymerization initiator.

Abstract: An active optical circuit sheet or active optical circuit board wherein an electro optical switch or optical modulator is driven with a voltage (SIGin) from an electronic device, the electrical signal (SIGin) is converted to an optical signal, transmitted and then converted to an electrical signal (SIGout) at an optical receiver element, and an electrical connection is formed between an optical wiring board and the electronic device for transmission of signals to another or the same electronic device, separating the electrical wiring at the electronic device end and the optical wiring at the optical wiring board end, or alternatively, SIGin and SIGout electrode pads are provided on the side of the optical wiring board on which the optical device is mounted or on the opposite side, for connection with the electronic device.

Abstract: An optical integrated circuit wherein the waveguide network is constructed of a passive waveguide and a functional material is used on the functional portions, an optical circuit device which uses transparent electrodes, an optical switch which uses transparent electrodes and a functional portion made of a non-linear optical material, a matrix optical switch which converts inputted and outputted light at an electrical/optical converter element, and an optical integrated circuit or optical circuit device prepared by selective vapor growth of a functional material on desired regions, as well as an organic film growth process by which an organic film is selectively grown on recess walls and an organic film formation process whereby organic CVD or MLD is performed using a chamber divided into multiple regions.

Abstract: An optical circuit system which takes out at least a portion of the light of a light power source corresponding to at least one type of output voltage of an IC, board, multichip module, electronic element, or opto-electronic element and produces an optical signal, wherein the light power source is an optical waveguide into which light has been introduced, a waveguide laser, or a waveguide optical amplifier, light reflecting portions are provided at its ends and/or middle, a signal transmission waveguide is formed in contact with the side surface and/or top or bottom surface of the optical waveguide or in proximity to the same at a certain distance, and the optical signal corresponding to at least one type of output voltage of the IC, board, multichip module, electronic element, or opto-electronic element is made to propagate to the signal transmission waveguide, which optical circuit system is rich in flexibility and enables complicated optical interconnections to be handled, and components of the same.

Abstract: A method of coupling optical parts including bonding the optical coupling faces of two optical waveguides by butting and fusing them. Also, a method for forming a refractive-index distribution having the focusing lens effect by setting the interval between the optical coupling faces of two optical parts to 0.1 mm or more, feeding a refractive-index imaging material also serving as an adhesive into the gap between the faces, and applying light to the refractive-index imaging material from the optical coupling face of at least one of the optical parts.

Abstract: A method of coupling optical parts including bonding the optical coupling faces of two optical waveguides by butting and fusing them. Also, a method for forming a refractive-index distribution having the focusing lens effect by setting the interval between the optical coupling faces of two optical parts to 0.1 mm or more, feeding a refractive-index imaging material also serving as an adhesive into the gap between the faces, and applying light to the refractive-index imaging material from the optical coupling face of at least one of the optical parts.

Abstract: A method of and apparatus for forming a volume type phase hologram comprising the steps of, after exposure of a holographic material comprising a polymeric matrix having a radiation active substance associated therewith to an interference pattern of radiation, dipping the pattern-wise exposed holographic material in a swelling solution consisting of a first solvent which can act as a good solvent for the polymer of the matrix and a second solvent which can act as a poor solvent for the polymer and has a higher boiling point than that of the first solvent, and then pulling the swollen holographic material up from the swelling solution, whereby uniformly developed holograms having a large size and high qualities can be easily produced by a simple production process.

Abstract: A method of and apparatus for forming a volume type phase hologram comprising the steps of, after exposure of a holographic material comprising a polymeric matrix having a radiation active substance associated therewith to an interference pattern of radiation, dipping the pattern-wise exposed holographic material in a swelling solution consisting of a first solvent which can act as a good solvent for the polymer of the matrix and a second solvent which can act as a poor solvent for the polymer and has a higher boiling point than that of the first solvent, and then pulling the swollen holographic material up from the swelling solution, whereby uniformly developed holograms having a large size and high qualities can be easily produced by a simple production process.

Abstract: A visible ray-recording hologram material comprising a polymer containing a carbazole ring, iodoform, and an aromatic colorant having a fused ring system. This material enables recording with rays having a wavelength of 450 to 550 nm.