Abstract: The present invention provides an acoustic processing device capable of providing a high-quality sound even in a standby through mode. A controller is characterized by supplying power from an auxiliary power supply to a sound signal processing unit in the standby through mode. In the standby through mode, the controller extracts a sound signal included in an input HDMI signal, outputs a high-frequency sound component from an input/output unit to, for example, a television, and outputs a low-frequency sound component from a sound output terminal to a speaker (for example, a subwoofer) with an amplification function. As a result, the user can listen to content with powerful bass on the television, without operating an amplifying circuit, which consumes most of the power consumed by the acoustic processing device, using a main power supply, that is, while suppressing the power consumption of the acoustic processing device.

Abstract: The present invention provides an acoustic processing device capable of providing a high-quality sound even in a standby through mode. A controller is characterized by supplying power from an auxiliary power supply to a sound signal processing unit in the standby through mode. In the standby through mode, the controller extracts a sound signal included in an input HDMI signal, outputs a high-frequency sound component from an input/output unit to, for example, a television, and outputs a low-frequency sound component from a sound output terminal to a speaker (for example, a subwoofer) with an amplification function. As a result, the user can listen to content with powerful bass on the television, without operating an amplifying circuit, which consumes most of the power consumed by the acoustic processing device, using a main power supply, that is, while suppressing the power consumption of the acoustic processing device.

Abstract: Provided is a light quantity adjusting device that adjusts size of a diaphragm opening centering on an optical axis of an optical system that includes: a first pair of a first and a second rectilinear diaphragm blades slidably arranged at positions opposing across the diaphragm opening in a direction moving to and from the optical axis on a plane orthogonal to the optical axis; a second pair of a third and a fourth rectilinear diaphragm blades slidably arranged at positions opposing across the diaphragm opening, in a direction orthogonal the first pair of blades move, and in a direction to and from the optical axis; and a driving unit that adjusts a size of the diaphragm opening by sliding the blades. The driving unit drives the blades so as to adjustably form and maintain a shape of an opening perimeter of the diaphragm opening in nearly similar shapes.

Abstract: Provided is a light quantity adjusting device that adjusts size of a diaphragm opening centering on an optical axis of an optical system that includes: a first pair of a first and a second rectilinear diaphragm blades slidably arranged at positions opposing across the diaphragm opening in a direction moving to and from the optical axis on a plane orthogonal to the optical axis; a second pair of a third and a fourth rectilinear diaphragm blades slidably arranged at positions opposing across the diaphragm opening, in a direction orthogonal the first pair of blades move, and in a direction to and from the optical axis; and a driving unit that adjusts a size of the diaphragm opening by sliding the blades. The driving unit drives the blades so as to adjustably form and maintain a shape of an opening perimeter of the diaphragm opening in nearly similar shapes.

Abstract: In an aperture stop mechanism, two aperture blades are arranged so as to overlap each other and form a single light passage opening into which light utilized in imaging is introduced with the respective edge portions of the two aperture blades. A drive mechanism drives the two aperture blades in directions different from each other, whereby the aperture area of the light passage opening is changed within a predetermined range. When the two aperture blades are located at a minimum aperture position where the aperture area of the light passage opening is minimum within the predetermined range, the two aperture blades are provided so that the single light passage opening surrounded by boundaries including eight straight lines is constituted of the respective edge portions of the two aperture blades.

Abstract: In an aperture stop mechanism, two aperture blades are arranged so as to overlap each other and form a single light passage opening into which light utilized in imaging is introduced with the respective edge portions of the two aperture blades. A drive mechanism drives the two aperture blades in directions different from each other, whereby the aperture area of the light passage opening is changed within a predetermined range. When the two aperture blades are located at a minimum aperture position where the aperture area of the light passage opening is minimum within the predetermined range, the two aperture blades are provided so that the single light passage opening surrounded by boundaries including eight straight lines is constituted of the respective edge portions of the two aperture blades.

Abstract: Nitrous oxide contained in a gas is directly decomposed by contacting the gas with a catalyst layer composed mainly of tin (IV) oxide at a reaction temperature of not less than 250.degree. C., preferably not less than 300.degree. C. Particularly when a cobalt (II) compound is added to the catalyst layer, nitrous oxide can be effectively removed to a low concentration by contacting the gas with the catalyst layer at the reaction temperature of not less than 200.degree. C., preferably not less than 300.degree. C. By the present process, nitrous oxide which has not conventionally effectively removed can be reliably removed at a low cost. The present process can be applied for the removal of nitrous oxide in exhaust gases discharged from a sludge-incinerating furnace, a boiler fine powder coal combustion furnace, etc.