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本发明提供一种用于探测烃气的红外探测器,这种红外探测器的工作过程是这样的:来自光源(10)的红外光透过滤光片(12)后形成一束光束(14),该光束再穿过一个可能包含烃气的空间(16)。光束(14)的波长中包含一种能被烃气吸收的波长(样品波长)和一种不会被烃气吸收的波长(参考波长)。光束(14)落在一个探测器上,该探测器中的两个传感器(22.24)接收透过其各自的滤光片(18.20)的光。样品滤光片(20)允许一种波长的光透过;参考滤光片(18)则允许两种波长
The present invention provides an infrared detector for detecting hydrocarbon gas. The working process of the infrared detector is such that the infrared light from the light source (10) is transmitted through the filter (12) to form a beam ), Which again passes through a space (16) that may contain hydrocarbon gas. The wavelength of the light beam (14) contains a wavelength (sample wavelength) that can be absorbed by the hydrocarbon gas and a wavelength (reference wavelength) that is not absorbed by the hydrocarbon gas. The light beam (14) falls on a detector whose two sensors (22.24) receive the light transmitted through its respective filter (18.20). The sample filter (20) allows one wavelength of light to pass through; the reference filter (18) allows two wavelengths