Abstract: An optical device is broken down into an optical element made of optical crystal and a holder made of alloy approximated in thermal expansion coefficient to the optical crystal, and the optical element is soldered to or melt bonded to the holder with a piece of solder or glass; the joint area is spaced from the periphery of the optical crystal so that a buffer area, which is spaced from the periphery, is created between the periphery and the joint area; even if cracks and/or scratches have been occurred in an end surface of the optical element, thermal stress is less influential in growing the scratches by virtue of the buffer area, and the optical device keeps the design optical characteristics.

Abstract: An optical component composite body is obtained in which there is no damage to the optical component even when it is bonded to a metal holder by solder or low melting point glass. The metal holder of the present invention is provided with a mounting portion protruding from one side of the main body and a grasping portion protruding from the other side of the main body. The mounting portion is provided with a plurality of protrusions formed in a comb tooth configuration. An optical component formed from alumina (Al2O3) is bonded by solder to a bonding surface of a protrusion, another optical component formed from LiNbO3 is bonded by solder to a bonding surface of another protrusion, and a further optical component formed from YVO4 is bonded by solder to a bonding surface of a further protrusion.

Abstract: An optical device is broken down into an optical element made of optical crystal and a holder made of alloy approximated in thermal expansion coefficient to the optical crystal, and the optical element is soldered to or melt bonded to the holder with a piece of solder or glass; the joint area is spaced from the periphery of the optical crystal so that a buffer area, which is spaced from the periphery, is created between the periphery and the joint area; even if cracks and/or scratches have been occurred in an end surface of the optical element, thermal stress is less influential in growing the scratches by virtue of the buffer area, and the optical device.

Abstract: An optical device is broken down into an optical element made of optical crystal and a holder made of alloy approximated in thermal expansion coefficient to the optical crystal, and the optical element is soldered to or melt bonded to the holder with a piece of solder or glass; the joint area is spaced from the periphery of the optical crystal so that a buffer area, which is spaced from the periphery, is created between the periphery and the joint area; even if cracks and/ or scratches have been occurred in an end surface of the optical element, thermal stress is less influential in growing the scratches by virtue of the buffer area, and the optical device

Abstract: An optical component composite body is obtained in which there is no damage to the optical component even when it is bonded to a metal holder by solder or low melting point glass. The metal holder of the present invention is provided with a mounting portion protruding from one side of the main body and a grasping portion protruding from the other side of the main body. The mounting portion is provided with a plurality of protrusions formed in a comb tooth configuration. An optical component formed from alumina (Al2O3) is bonded by solder to a bonding surface of a protrusion, another optical component formed from LiNbO3 is bonded by solder to a bonding surface of another protrusion, and a further optical component formed from YVO4 is bonded by solder to a bonding surface of a further protrusion.

Abstract: An optical device is broken down into an optical element made of optical crystal and a holder made of alloy approximated in thermal expansion coefficient to the optical crystal, and the optical element is soldered to or melt bonded to the holder with a piece of solder or glass; the joint area is spaced from the periphery of the optical crystal so that a buffer area, which is spaced from the periphery, is created between the periphery and the joint area; even if cracks and/or scratches have been occurred in an end surface of the optical element, thermal stress is less influential in growing the scratches by virtue of the buffer area, and the optical device keeps the design optical characteristics.