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NDIR GAS SENSOR, OPTICAL DEVICE, AND OPTICAL FILTER FOR NDIR GAS SENSOR
NDIR GAS SENSOR, OPTICAL DEVICE, AND OPTICAL FILTER FOR NDIR GAS SENSOR
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机译:NDIR气体传感器,光学装置和NDIR气体传感器的滤光器
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摘要
This disclosure provides a NDIR gas sensor comprising: an optical filter having a substrate and a multilayer film; and an infrared light emitting and receiving device having a semiconductor layer of a first conductive type, an active layer, and a semiconductor layer of a second conductive type; where the multilayer film has a structure in which a first layer and a second layer are alternately stacked; the active layer contains InAsySb1-y (0.1≤y≤0.2); and the optical filter includes a wavelength range having an average transmittance of 70% or more with a width of 50 nm or more in a wavelength range of 6 μm to 10 μm, and has a maximum transmittance of 10% or more in a wavelength range of 12.5 μm to 20 μm and an average transmittance of 5% or more and 60% or less in a wavelength range of 12.5 μm to 20 μm.
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机译:本发明提供了一种Ndir气体传感器,包括:具有基板和多层膜的滤光器;和具有第一导电类型,有源层和第二导电类型的半导体层的半导体层的红外发光和接收装置;在多层膜具有交替堆叠第一层和第二层的结构的情况下,其中有源层包含InAs Y sub> SB 1-y sub>(0.1≤y≤0.2);并且光学滤光器包括波长范围,其平均透射率为70%或更多,宽度为50nm以上的波长范围为6μm至10μm,并且在波长范围内具有10%或更多的最大透射率在12.5μm至20μm的波长范围内为12.5μm至20μm,平均透射率为5%或更高,60%或更低。
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