Abstract: A gas sensor comprises first and second light emitting parts, first and second light receiving parts, and first and second optical path regions, wherein the optical path regions have a common region, a first light receiving part has a larger rate of change of an output signal with respect to a first gas than a second light receiving part, the second light receiving part has a larger rate of change of an output signal with respect to an second gas than the first light receiving part, the first light receiving part has a sensitivity peak wavelength closer to a first wavelength in an absorption wavelength band of the first gas than the second light receiving part, and the second light receiving part has a sensitivity peak wavelength closer to a second wavelength in an absorption wavelength band of the second gas than the first light receiving part.

Abstract: Provided is a gas sensor comprising first and second light emitting parts, first and second light receiving parts, a first optical path region and a second optical path region, wherein the optical path regions have a common region, an optical path length of the first optical path region is longer than that of the second optical path region, a rate of change of an output signal with respect to a gas to be measured of the first light receiving part is larger than that of the second light receiving part, a rate of change of an output signal with respect to an interference gas of the second light receiving part is larger than that of the first light receiving part, and a sensitivity peak wavelength of the second light receiving part overlaps with an absorption wavelength of water vapor.

Abstract: Signal output apparatus and concentration measurement system has a light receiving unit and an interface unit provided at a support unit. Light receiving unit receives infrared rays emitted to a measurement target substance, and outputs a detection signal according to received infrared rays. Storage unit stores a parameter according to a characteristic of at least one of a plurality of components including the light receiving unit, the parameter being used for concentration computation of the measurement target substance, as a calibration parameter. Interface unit outputs an output signal including a calibration parameter signal according to the calibration parameter input from the storage unit and a signal based on the detection signal input from the light receiving unit to a signal computation processing unit, without executing the concentration computation.

Abstract: The optical concentration measuring device 1 includes: a first optical filter 41; a second optical filter 42; and an operation part 60, wherein a difference between a peak wavelength of the first effective sensitivity spectrum based on the first transmission band in the first light receiving part 51 and a peak wavelength of the second effective sensitivity spectrum based on the second transmission band in the second light receiving part 52 is ±0.2 times or more and ±0.8 times or less the full width at half maximum of the first effective sensitivity spectrum, wherein the operation part removes an attenuation amount of the first intensity by the interference gas and an attenuation amount of the second intensity by the interference gas.

Abstract: The optical concentration measuring device 1 includes: a first optical filter 41; a second optical filter 42; and an operation part 60, wherein a difference between a peak wavelength of the first effective sensitivity spectrum based on the first transmission band in the first light receiving part 51 and a peak wavelength of the second effective sensitivity spectrum based on the second transmission band in the second light receiving part 52 is ±0.2 times or more and ±0.8 times or less the full width at half maximum of the first effective sensitivity spectrum, wherein the operation part removes an attenuation amount of the first intensity by the interference gas and an attenuation amount of the second intensity by the interference gas.

Abstract: Provided is a gas sensor comprising first and second light emitting parts, first and second light receiving parts, a first optical path region and a second optical path region, wherein the optical path regions have a common region, an optical path length of the first optical path region is longer than that of the second optical path region, a rate of change of an output signal with respect to a gas to be measured of the first light receiving part is larger than that of the second light receiving part, a rate of change of an output signal with respect to an interference gas of the second light receiving part is larger than that of the first light receiving part, and a sensitivity peak wavelength of the second light receiving part overlaps with an absorption wavelength of water vapor.

Abstract: An object is to provide a signal output apparatus and a concentration measurement system capable of correcting a deviation caused by a characteristic variation of each apparatus and realizing concentration measurement with high accuracy.

Abstract: A gas detection apparatus (100) includes a first layer (1) and a second layer (2) disposed opposite the first layer (1) in a predetermined direction (z-axis direction). The first layer (1) includes a light emitter that emits light and a light receiver that receives the light after the light passes through a waveguide. The second layer (2) includes a light input unit of the waveguide opposite the light emitter in the predetermined direction (z-axis direction) and a light output unit of the waveguide opposite the light receiver in the predetermined direction (z-axis direction). The gas detection apparatus (100) can be miniaturized.

Abstract: A small-size reliable gas sensor that can reduce a measurement error can be provided. The gas sensor includes a first light source; a first sensor unit and a second sensor unit disposed to receive light output from the first light source; a first substrate having a first principal surface on which the first light source and the first sensor unit are provided; and a second substrate having a first principal surface on which the second sensor unit is provided. The first sensor unit is disposed at a location where light output from the first light source and reflected on the second principal surface strikes the first principal surface of the first substrate.

Abstract: A gas detection apparatus (100) includes a first layer (1) and a second layer (2) disposed opposite the first layer (1) in a predetermined direction (z-axis direction). The first layer (1) includes a light emitter that emits light and a light receiver that receives the light after the light passes through a waveguide. The second layer (2) includes a light input unit of the waveguide opposite the light emitter in the predetermined direction (z-axis direction) and a light output unit of the waveguide opposite the light receiver in the predetermined direction (z-axis direction). The gas detection apparatus (100) can be miniaturized.

Abstract: PROBLEM TO BE SOLVED: To reduce an influence on an optical device caused by stress variation on a resin sealing body due to an environmental change and similar change. SOLUTION: An optical device includes a substrate 11, a semiconductor lamination portion formed on the substrate 11 and configured to receive or emit a light, a protective layer 3 that has a shape to cover an entire surface of the semiconductor lamination portion, a mold resin 6 configured to seal the protective layer 3 and the substrate 11 excluding a surface of the substrate 11 on an opposite side of a surface on which the semiconductor lamination portion is formed. The light is entered or emitted from a side of the substrate 11, and the mold resin 6 includes a through hole 61 configured to pass through from a top surface of the mold resin 6 to the protective layer 3. A deformation of the mold resin 6 is reduced by the protective layer 3 and the through hole 61.

Abstract: A small-size reliable gas sensor that can reduce a measurement error can be provided. The gas sensor includes a first light source; a first sensor unit and a second sensor unit disposed to receive light output from the first light source; a first substrate having a first principal surface on which the first light source and the first sensor unit are provided; and a second substrate having a first principal surface on which the second sensor unit is provided. The first sensor unit is disposed at a location where light output from the first light source and reflected on the second principal surface strikes the first principal surface of the first substrate.

Abstract: PROBLEM TO BE SOLVED: To reduce an influence on an optical device caused by stress variation on a resin sealing body due to an environmental change and similar change. SOLUTION: An optical device includes a substrate 11, a semiconductor lamination portion formed on the substrate 11 and configured to receive or emit a light, a protective layer 3 that has a shape to cover an entire surface of the semiconductor lamination portion, a mold resin 6 configured to seal the protective layer 3 and the substrate 11 excluding a surface of the substrate 11 on an opposite side of a surface on which the semiconductor lamination portion is formed. The light is entered or emitted from a side of the substrate 11, and the mold resin 6 includes a through hole 61 configured to pass through from a top surface of the mold resin 6 to the protective layer 3. A deformation of the mold resin 6 is reduced by the protective layer 3 and the through hole 61.

Abstract: A small-size reliable gas sensor that can reduce a measurement error can be provided. The gas sensor includes: a first light source (20); a first sensor unit (31) and a second sensor unit (32) disposed to receive light output from the first light source (20); a first substrate (41) having a first principal surface (411) on which the first light source (20) and the first sensor unit (31) are provided; and a second substrate (42) having a first principal surface (422) on which the second sensor unit (32) is provided. The first sensor unit (31) is disposed at a location where light output from the first light source (20) and reflected on the second principal surface (412) strikes the first principal surface (422) of the first substrate (41).

Abstract: An infrared-sensor filter member includes an optical filter disposed in an opening portion of a second member and a first member. The infrared-sensor filter member includes a recess portion formed from a light-incident surface of the optical filter and the first member. At least a part of a bottom surface of the recess portion is formed by the light-incident surface and side walls of the recess portion, which are formed by the first member.

Abstract: A small-size reliable gas sensor that can reduce a measurement error can be provided. The gas sensor includes: a first light source (20); a first sensor unit (31) and a second sensor unit (32) disposed to receive light output from the first light source (20); a first substrate (41) having a first principal surface (411) on which the first light source (20) and the first sensor unit (31) are provided; and a second substrate (42) having a first principal surface (422) on which the second sensor unit (32) is provided. The first sensor unit (31) is disposed at a location where light output from the first light source (20) and reflected on the second principal surface (412) strikes the first principal surface (422) of the first substrate (41).

Abstract: An infrared-sensor filter member includes an optical filter disposed in an opening portion of a second member and a first member. The infrared-sensor filter member includes a recess portion formed from a light-incident surface of the optical filter and the first member. At least a part of a bottom surface of the recess portion is formed by the light-incident surface and side walls of the recess portion, which are formed by the first member.

Abstract: The light receiving device of the present invention includes a circuit pattern including first and second light receiving parts and first and second output terminals, each of the first and second light receiving parts having a semiconductor layered part forming a photodiode structure having first and second conductivity type semiconductor layers, and first and second electrodes respectively connected to the first conductivity type semiconductor layer and the second conductivity type semiconductor layer, wherein the first electrodes of the first and second light receiving parts are connected to each other, the second electrode of the first light receiving part is connected to the first output terminal, the second electrode of the second light receiving part is connected to the second output terminal, and a difference between signals generated in the first and second light receiving parts are output between the first and second output terminals.

Abstract: The light receiving device of the present invention includes a circuit pattern including first and second light receiving parts and first and second output terminals, each of the first and second light receiving parts having a semiconductor layered part forming a photodiode structure having first and second conductivity type semiconductor layers, and first and second electrodes respectively connected to the first conductivity type semiconductor layer and the second conductivity type semiconductor layer, wherein the first electrodes of the first and second light receiving parts are connected to each other, the second electrode of the first light receiving part is connected to the first output terminal, the second electrode of the second light receiving part is connected to the second output terminal, and a difference between signals generated in the first and second light receiving parts are output between the first and second output terminals.

Abstract: An infrared sensor capable of more highly accurately correcting an electrical signal converted by a light receiving unit is provided. An infrared sensor (100) converts energy of infrared rays radiated from an object (for example, human body) to an electrical signal and outputs the electrical signal, the infrared sensor comprising: a light receiving unit (10) that includes a quantum type infrared detection element (11) and that converts the energy of the infrared rays to an electrical signal; and a correction unit (20) that corrects the output signal from the light receiving unit (10), wherein the light receiving unit (10) and the correction unit (20) are formed of the identical material on the identical substrate (1) and have the identical configuration so that the infrared rays enters in an identical manner.