公开(公告)号：US5877862A

公开(公告)日：1999-03-02

申请号：US918472

申请日：1997-08-26

申请人： David D. Nelson ,  J. Barry McManus ,  Mark Zahniser ,  Charles E. Kolb

发明人： David D. Nelson ,  J. Barry McManus ,  Mark Zahniser ,  Charles E. Kolb

IPC分类号： G01N21/35 ,  G01N21/39 ,  G01N21/00

CPC分类号： G01N21/3504 ,  G01N21/39

摘要： A cross-road motor vehicle exhaust gas analyzer uses tunable infrared laser differential absorption spectroscopy incorporating photon infrared detection to determine the absolute fractional absorption of a laser by the gaseous medium. Spectroscopic constants of the gaseous species of interest are applied to the absolute fractional absorption to calculate the pertinent absolute column densities. In addition to a laser that sweeps across one or more absorption line of an component of interest, the system of the invention includes a laser source tunable over an absorption line of a reference species; the calculated column density of the reference species is used to normalize the concentration of the component of interest to the fuel consumption rate of the motor vehicle.

摘要翻译： 交叉路机动车排气分析仪采用可调谐的红外激光差分吸收光谱法，结合光子红外检测来确定气体介质对激光的绝对分数吸收。 将感兴趣的气态物质的光谱常数应用于绝对分数吸收以计算相关的绝对柱密度。 除了扫描感兴趣部件的一个或多个吸收线的激光器之外，本发明的系统还包括可在参考物质的吸收线上调节的激光源; 参考物种的计算柱密度用于将感兴趣的组分的浓度归一化为机动车辆的燃料消耗率。

公开(公告)号：USH738H

公开(公告)日：1990-02-06

申请号：US381543

申请日：1989-07-17

申请人： J. Barry McManus ,  Roger S. Putnam ,  H. John Caulfield

发明人： J. Barry McManus ,  Roger S. Putnam ,  H. John Caulfield

IPC分类号： G02B5/32 ,  G02B26/02

CPC分类号： G02B5/32 ,  G02B26/02

摘要： A device that provides reconfigurable optical interconnections of multipleata channels that have applications in highly parallel computers. The device utilizes an array of optical switches which direct a set of optical beams toward any one of a selection of holograms and each hologram when selected deflects the input beams toward a detector.