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    • 34. 发明授权
    • Multiple-reflection optical gas cell
    • 多反射光气单元
    • US4410271A
    • 1983-10-18
    • US274014
    • 1981-06-15
    • Thomas G. Matthews
    • Thomas G. Matthews
    • G01N21/03G01N30/74G01J3/44
    • G01N21/031
    • A multiple-reflection optical cell for Raman or fluorescence gas analysis consists of two spherical mirrors positioned transverse to a multiple-pass laser cell in a confronting plane-parallel alignment. The two mirrors are of equal diameter but possess different radii of curvature. The spacing between the mirrors is uniform and less than half of the radius of curvature of either mirror. The mirror of greater curvature possesses a small circular portal in its center which is the effective point source for conventional F1 double lens collection optics of a monochromator-detection system. Gas to be analyzed is flowed into the cell and irradiated by a multiply-reflected composite laser beam centered between the mirrors of the cell. Raman or fluorescence radiation originating from a large volume within the cell is (1) collected via multiple reflections with the cell mirrors, (2) partially collimated and (3) directed through the cell portal in a geometric array compatible with F1 collection optics.
    • 用于拉曼或荧光气体分析的多反射光学单元由在面对平面平行对准中横向于多遍激光单元的两个球面镜组成。 两个反射镜的直径相等但具有不同的曲率半径。 反射镜之间的间隔是均匀的,并且小于任一镜的曲率半径的一半。 更大曲率的镜面在其中心具有小的圆形入口,这是单色仪检测系统的常规F1双透镜收集光学器件的有效点源。 要分析的气体流入电池并通过以电池的反射镜为中心的多重反射的复合激光束照射。 来自细胞内的大体积的拉曼或荧光辐射是(1)通过多个反射与细胞镜收集,(2)部分准直和(3)以与F1收集光学器件兼容的几何阵列引导通过细胞入口。