Abstract: An optical device includes: a chassis that receives an optical element; a first terminal that is extended from a bottom face of the chassis and is electrically connected to the optical element; a second terminal that is extended from a side face of the chassis and is electrically connected to the optical element; a projection portion that is provided on the bottom face of the chassis and a top face of the projection portion is higher than a distal end of the first terminal.

Abstract: An optical device includes: a stem; a mount portion connected with the stem and having an upper face, a first face and a second face opposite to the first face, the first face and the second face constituting a side face with respect to the upper face; an optical element mounted on the upper face of the mount portion; an electronic components mounted on the first face and the second face of the mount portion respectively; a first lead that penetrates the stem and is extended to a side of the first face of the mount portion; and a second lead that penetrates the stem and is extended to a side of the second face of the mount portion.

Abstract: An optical device includes: a first lens; a second lens that is arranged behind a focal point of the first lens and is optically connected to the first lens; an optical attenuator that is arranged on an optical path between the first lens and the second lens and changes passage amount of an inputting light.

Abstract: An optical device includes: a stem; a mount portion connected with the stem and having an upper face, a first face and a second face opposite to the first face, the first face and the second face constituting a side face with respect to the upper face; an optical element mounted on the upper face of the mount portion; an electronic components mounted on the first face and the second face of the mount portion respectively; a first lead that penetrates the stem and is extended to a side of the first face of the mount portion; and a second lead that penetrates the stem and is extended to a side of the second face of the mount portion.

Abstract: A light-receiving device including: a lens; and a light-receiving element optically coupled to the lens, a plurality of optical path divided by the lens crossing each other in a position of between the lens and the light-receiving element.

Abstract: An optical device includes: a chassis that receives an optical element; a first terminal that is extended from a bottom face of the chassis and is electrically connected to the optical element; a second terminal that is extended from a side face of the chassis and is electrically connected to the optical element; a projection portion that is provided on the bottom face of the chassis and a top face of the projection portion is higher than a distal end of the first terminal.

Abstract: The present invention relates to a package for a high-frequency device, in which the characteristic impedance can be matched while a gap between the casing and each terminal is maintained wide enough to avoid contact. In the package for a high-frequency device, each metallic terminal is hermetically fixed to a conductive casing and is electrically insulated from the conductive casing by glass. Each metallic terminal extends in parallel with a side wall of the conductive casing while it is separated from the side wall. Each metallic terminal is also flanked by a pair of conductive protruding portions that are formed on a side wall of the conductive casing and extend in the longitudinal direction of each metallic terminal. The conductive protruding portions are formed on either side of each metallic terminal and serve to match the characteristic impedance.