公开(公告)号：US6121617A

公开(公告)日：2000-09-19

申请号：US26514

申请日：1998-02-19

申请人： Noritomo Hirayama ,  Satoru Sakaue ,  Masahiro Uno ,  Yosheyuki Sekine

发明人： Noritomo Hirayama ,  Satoru Sakaue ,  Masahiro Uno ,  Yosheyuki Sekine

IPC分类号： G01N21/03 ,  G01N21/35 ,  G01N21/3504 ,  G01N21/61

CPC分类号： G01N21/3504 ,  G01N21/031

摘要： An infrared gas analyzer is formed of a source of infrared rays for emitting infrared flux; an infrared flux interrupting device for chopping the emitted infrared flux from the source of the infrared rays; a condensing optical system for obtaining a predetermined solid angle in the emitted infrared flux to thereby form a condensed flux; and a multi-reflection cell disposed at an outlet of the condensing optical system, to which the condensed flux is supplied and a gas to be measured is fed. The multi-reflection cell has a multi-reflection optical system formed of a plurality of concave mirrors. The analyzer also includes an infrared level detector for detecting an amount of infrared rays with a wavelength band absorbed by a component gas to be analyzed and contained in the infrared rays emitted by the multi-reflection cell. At least the condensing optical system, multi-reflection cell and infrared level detector are accurately positioned by using as a reference a position of the condensing optical system at which the condensed flux is emitted, and are coupled tightly at coupling positions without an air-flowing layer. Accordingly, the infrared gas analyzer can be made small to detect and analyze a low density component gas and for an explosion-proof environment.

摘要翻译： 红外线气体分析器由用于发射红外线的红外线源形成; 用于从红外线源切断发射的红外线通量的红外线通量中断装置; 用于在发射的红外线通量中获得预定立体角从而形成冷凝通量的聚光光学系统; 以及设置在聚光光学系统的出口处的多反射单元，供给冷凝的通量并供给待测量的气体。 多反射单元具有由多个凹面镜构成的多反射光学系统。 分析仪还包括红外线检测器，用于检测由待分析的成分气体吸收的波长带的红外线的量，并包含在由多反射单元发射的红外线中。 通过使用冷凝光束发射的聚光光学系统的位置作为参考，精确地定位聚光光学系统，多反射单元和红外电平检测器，并且在没有空气流动的情况下紧密耦合在耦合位置 层。 因此，能够使红外线气体分析装置小型化，对低密度成分气体和防爆环境进行检测分析。