Abstract: A member for terahertz equipment includes: a substrate main body having a first principal surface and a second principal surface; and a reflection suppressing portion provided on at least one of the first principal surface or the second principal surface of the substrate main body. The reflection suppressing portion includes a plurality of protrusions which are arranged in a grating shape, and each have a tapered portion in a vertical cross section.

Abstract: A light converging member (10) according to an embodiment of the present invention includes: a recess portion (32) that is used for an optical component (100) with an optical element (14) for emitting light, the recess portion being opposed to the optical element (14) and having a size 0.5 or more times larger than the maximum length of a light emission region in the optical element; and a lens body (30) for converging light having passed through the recess portion (32).

Abstract: The present invention relates to an optical component and a transparent sealing member. An optical component has: at least one optical element; and a package that houses therein the optical element. The package has: a mounting board on which the optical element is mounted; a transparent sealing member bonded on the mounting board; a recessed section surrounding the optical element mounted on the mounting board; and a refractive index matching agent applied to the inside of the recessed section. The package has at least one groove in communication with the outside from the recessed section.

Abstract: A light converging member (10) according to an embodiment of the present invention includes: a recess portion (32) that is used for an optical component (100) with an optical element (14) for emitting light, the recess portion being opposed to the optical element (14) and having a size 0.5 or more times larger than the maximum length of a light emission region in the optical element; and a lens body (30) for converging light having passed through the recess portion (32).

Abstract: The present invention relates to a transparent sealing member and an optical component. This transparent sealing member (10) is used in a package (20) for accommodating at least one optical element (14), and is bonded to a mounting substrate (16) having the optical element (14) mounted thereto, by a resin adhesive (50). The transparent sealing member (10) is provided with a plurality of particles (32) which are affixed to a surface (30a) to be bonded to the mounting substrate (16).

Abstract: A first transparent sealing member is used in a package accommodating at least one optical element, and is attached to a mounting substrate having a mounting surface for the optical element. In the first transparent sealing member, at least one corner part among a plurality of corner parts configured by a surface facing the mounting substrate and a surface along the mounting surface of the mounting substrate has a curved shape, and punctiform minute recessed parts are formed on the surface of the curved shape. The average presence frequency of the minute recessed parts is 100,000 to 3,000,000 inclusive per 1 mm2.

Abstract: The present invention relates to an optical component and a transparent body used in the optical component. The optical component includes at least one optical element that radiates ultraviolet light, and a package that accommodates the optical element. The package includes a mounting substrate on which the optical element is mounted, and a transparent body that is bonded to the mounting substrate with an organic-based adhesive layer therebetween. The package has a structure in which the ultraviolet light is transmitted through the transparent body but not guided to the adhesive layer, and the ultraviolet light does not directly come into contact with the adhesive layer.

Abstract: The present invention relates to a transparent sealing member and an optical component. The present invention is a transparent sealing member (10A) used in an optical component (100A) provided with a package (16A) having at least one optical element (14) emitting ultraviolet light (12) and a mount board (18) to which the optical element is mounted. The transparent sealing member (10A) is provided with a transparent body (24) joined on the mount board (18) via an organic adhesion layer (20), and the transparent body (24) has a housing space (26) in a lower surface opening.

Abstract: The present invention relates to a transparent sealing member. A quartz glass transparent sealing member is used in an optical component having at least one optical element, and a mounting board on which the optical element is mounted, and constitutes, with the mounting board, a package that houses the optical element. The concentration of aluminum in a surface portion is higher than the concentration of aluminum in an inner portion.

Abstract: A gas sensor includes: a gas sensor cartridge; and a gas sensor body to which the gas sensor cartridge, which includes: a case that has an intake port and an exhaust port and serves as a gas sensor chamber; a gas sensor device provided inside the case; an external connection terminal provided at the case and connected to the gas sensor device; a first sealing member that seals the intake port such that the intake port is opened when the gas sensor cartridge is attached to the gas sensor body; and a second sealing member that seals the exhaust port such that the exhaust port is opened when the gas sensor cartridge is attached to the gas sensor body, is detachably attached.

Abstract: A transparent sealing member is provided with minute recesses at least in the surface of the member from which light from an optical element is emitted. The average width of the minute recesses is 0.1 ?m to 2.0 ?m, the average depth of the minute recesses is 5 nm to 50 nm, and the average frequency of occurrence of the minute recesses is 100000 to 3000000 recesses per 1 mm2.

Abstract: A distance measuring device includes one or more processors configured to: detect a wave formed by synthesizing a frequency-swept electromagnetic wave transmitted to an object with a wave reflected on the object; measure, based on the synthesized wave, a distance to the object; calculate a displacement-caused inclination, caused by the displacement of the object, of a power spectrum of the synthesized wave; and measure the distance based on a signal in which the displacement-caused inclination has been removed from the power spectrum.

Abstract: The present invention relates to a transparent sealing member and an optical component. This transparent sealing member (10) is used in a package (20) for accommodating at least one optical element (14), and is bonded to a mounting substrate (16) having the optical element (14) mounted thereto, by a resin adhesive (50). The transparent sealing member (10) is provided with a plurality of particles (32) which are affixed to a surface (30a) to be bonded to the mounting substrate (16).

Abstract: The present invention relates to a transparent sealing member. A quartz glass transparent sealing member is used in an optical component having at least one optical element, and a mounting board on which the optical element is mounted, and constitutes, with the mounting board, a package that houses the optical element. The concentration of aluminum in a surface portion is higher than the concentration of aluminum in an inner portion.

Abstract: The present invention relates to an optical component and a transparent sealing member. An optical component has: at least one optical element; and a package that houses therein the optical element. The package has: a mounting board on which the optical element is mounted; a transparent sealing member bonded on the mounting board; a recessed section surrounding the optical element mounted on the mounting board; and a refractive index matching agent applied to the inside of the recessed section. The package has at least one groove in communication with the outside from the recessed section.

Abstract: A transparent sealing member is provided with minute recesses at least in the surface of the member from which light from an optical element is emitted. The average width of the minute recesses is 0.1 ?m to 2.0 ?m, the average depth of the minute recesses is 5 nm to 50 nm, and the average frequency of occurrence of the minute recesses is 100000 to 3000000 recesses per 1 mm2.

Abstract: A first transparent sealing member is used in a package accommodating at least one optical element, and is attached to a mounting substrate having a mounting surface for the optical element. In the first transparent sealing member, at least one corner part among a plurality of corner parts configured by a surface facing the mounting substrate and a surface along the mounting surface of the mounting substrate has a curved shape, and punctiform minute recessed parts are formed on the surface of the curved shape. The average presence frequency of the minute recessed parts is 100,000 to 3,000,000 inclusive per 1 mm2.

Abstract: A honeycomb structure includes a pillar-shaped honeycomb structure body having a porous partition wall. The honeycomb structure body includes a plurality of cells defined by the partition wall so as to extend from a first end face to a second end face of the honeycomb structure body, the partition wall is formed by a porous body including a silicon phase as a main phase and an oxide, and the oxide includes a first oxide made of an alkali earth metal oxide, Al2O3, and SiO2.

Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.

Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.