公开(公告)号：US5591975A

公开(公告)日：1997-01-07

申请号：US318566

申请日：1994-10-05

申请人： Michael D. Jack ,  Robert D. Stephens ,  Christopher B. Tacelli ,  David R. Nelson ,  Geoffrey A. Walter ,  Jose A. Santana ,  Lane H. Rubin

发明人： Michael D. Jack ,  Robert D. Stephens ,  Christopher B. Tacelli ,  David R. Nelson ,  Geoffrey A. Walter ,  Jose A. Santana ,  Lane H. Rubin

IPC分类号： G01N21/35 ,  G01N33/00 ,  G01N21/25

CPC分类号： G01N33/0037 ,  G01N21/3504 ,  G01N2021/1793

摘要： A light source radiates an infrared beam that passes through a chopper, a calibration cell and the exhaust plume of a motor vehicle passing in front of the source. A photosensor assembly includes a plurality of photodetectors which are spaced closely adjacent to each other and simultaneously sense the beam after it propagates through the plume. An optical beam homogenizer or integrator disposed between the plume and the photosensor unit causes the light incident on the photodetectors to have uniform intensity. The photodetectors are sensitive to different wavelengths corresponding to spectral absorption peaks of constituents of the composition of the plume, including carbon monoxide (CO), carbon dioxide (CO.sub.2), hydrocarbon (HC), water vapor (H.sub.2 O) and nitric oxide (NO). A computer computes the composition of the plume as the percentages of the constituents based on the sensed transmittances of the respective wavelengths through the plume. A video camera produces a video image of the vehicle license plate, which is displayed on a video monitor and recorded on a video recorder together with the plume composition data.

摘要翻译： 光源辐射红外光束，该红外光束穿过切割器，校准单元以及通过光源前方的机动车辆的排气羽流。 光传感器组件包括多个光电检测器，它们彼此紧邻地间隔开，并且在光束传播通过羽流之后同时感测光束。 设置在羽流和光电传感器单元之间的光束均化器或积分器使入射到光电检测器上的光具有均匀的强度。 对于包括一氧化碳（CO），二氧化碳（CO 2），烃（HC），水蒸气（H 2 O）和一氧化氮（NO））的羽流组成的成分的光谱吸收峰，光电探测器对不同波长敏感， 。 计算机根据通过羽流的相应波长的感测透射率来计算羽流的组成作为组分的百分比。 视频摄像机产生车辆牌照的视频图像，其被显示在视频监视器上并与羽流组合数据一起记录在录像机上。

公开(公告)号：US5365345A

公开(公告)日：1994-11-15

申请号：US683765

申请日：1991-04-10

申请人： Stephen H. Propst ,  Geoffrey A. Walter

发明人： Stephen H. Propst ,  Geoffrey A. Walter

IPC分类号： C23C16/01 ,  C23C16/26 ,  C23C16/27 ,  C23C16/30 ,  C23C16/36 ,  G02B1/10 ,  G02B5/20 ,  G02B5/22

CPC分类号： C23C16/276 ,  C23C16/01 ,  C23C16/26 ,  C23C16/306 ,  C23C16/36 ,  G02B1/10 ,  G02B5/208

摘要： Infrared transmitting windows having a diamond support are formed by first depositing diamond (14) on a mold (10) comprising a material which can withstand the optimum diamond growth temperatures. A germanium carbide adhesive layer (18) is deposited on the diamond layer Next, ZnSe, ZnS, or other index-matching material (16) is deposited on top of the diamond coating. Finally, the mold is removed. The end product is a diamond/ZnS(e) IR window requiring little or no polishing of diamond surfaces.

摘要翻译： 通过首先将金刚石（14）沉积在包含能够承受最佳金刚石生长温度的材料的模具（10）上来形成具有金刚石支撑件的红外透射窗。 在金刚石层上沉积碳化锗粘合剂层（18）。接下来，在金刚石涂层的顶部上沉积ZnSe，ZnS或其它折射率匹配材料（16）。 最后，去除模具。 最终产品是金刚石/ ZnS（e）IR窗口，需要很少或不需要抛光金刚石表面。

公开(公告)号：US5706092A

公开(公告)日：1998-01-06

申请号：US786003

申请日：1997-01-21

申请人： John E. Stannard ,  Cathy M. Peterson ,  Roger A. West ,  Geoffrey A. Walter

发明人： John E. Stannard ,  Cathy M. Peterson ,  Roger A. West ,  Geoffrey A. Walter

IPC分类号： G01J3/28 ,  G01J3/36 ,  G01J3/457 ,  G01J3/51

CPC分类号： G01J3/36 ,  G01J3/457

摘要： A differential spectrometry system detects very narrow-band spectral features, while providing much higher optical transmittance and signal-to-noise ratios than prior optical-filter-based spectrometer systems. A plurality of light detectors (10a, 10b) detect light that falls within respective wide wavebands. The wide wavebands have overlapping and non-overlapping portions, one of which is the desired narrow waveband. The detector outputs are operated upon to produce an output signal (22) which includes substantially only the desired narrow waveband. In the preferred embodiment, the light detectors (10a, 10b) are implemented with a pair of optical detectors (30a, 30b) and respective optical interference filters (24a, 24b). The filters have substantially identical cut-off wavelengths (.lambda..sub.2) and cut-on wavelengths that are shifted by .DELTA..lambda. with respect to each other (.lambda..sub.1 and (.lambda..sub.1 +.DELTA..lambda.), respectively). The detector outputs are differenced with an operational amplifier (33), so that detector signals resulting from spectral features common to both detectors (30a, 30b) are canceled. The remaining signal (36) varies according to the amount of light that falls between wavelength boundaries �.lambda..sub.1 and (.lambda..sub.1 +.DELTA..lambda.)!. A preferred method of fabricating the optical interference filters (24a, 24b) is also provided.

摘要翻译： 差分光谱系统检测非常窄带的光谱特征，同时提供比现有的基于光学滤光器的光谱仪系统更高的光透射率和信噪比。 多个光检测器（10a，10b）检测落入各个宽波段内的光。 宽波段具有重叠和不重叠的部分，其中一个是期望的窄波段。 操作检测器输出以产生输出信号（22），其基本上仅包括期望的窄波段。 在优选实施例中，光检测器（10a，10b）由一对光学检测器（30a，30b）和相应的光学干涉滤光器（24a，24b）来实现。 滤光器具有基本上相同的截止波长（λ2）和相对于彼此（λ1和（λ1+ΔTATAλ））偏移DELTAλ的截止波长。 检测器输出与运算放大器（33）不同，从而消除由两个检测器（30a，30b）共同的光谱特征产生的检测器信号。 剩余信号（36）根据波长边界（λ1和（λ1+ΔTATA））之间的光量而变化。 还提供了制造光学干涉滤光器（24a，24b）的优选方法。

公开(公告)号：US5624709A

公开(公告)日：1997-04-29

申请号：US480223

申请日：1995-06-07

申请人： John E. Stannard ,  Cathy M. Peterson ,  Roger A. West ,  Geoffrey A. Walter

发明人： John E. Stannard ,  Cathy M. Peterson ,  Roger A. West ,  Geoffrey A. Walter

IPC分类号： G01J3/28 ,  G01J3/36 ,  G01J3/457 ,  B05D5/06

CPC分类号： G01J3/36 ,  G01J3/457

摘要： A differential spectrometry system detects very narrow-band spectral features, while providing much higher optical transmittance and signal-to-noise ratios than prior optical-filter-based spectrometer systems. A plurality of light detectors (10a, 10b) detect light that falls within respective wide wavebands. The wide wavebands have overlapping and non-overlapping portions, one of which is the desired narrow waveband. The detector outputs are operated upon to produce an output signal (22) which includes substantially only the desired narrow waveband. In the preferred embodiment, the light detectors (10a, 10b) are implemented with a pair of optical detectors (30a, 30b) and respective optical interference filters (24a, 24b). The filters have substantially identical cut-off wavelengths (.lambda..sub.2) and cut-on wavelengths that are shifted by .DELTA..lambda. with respect to each other (.lambda..sub.1 and (.lambda..sub.1 +.DELTA..lambda.), respectively). The detector outputs are differenced with an operational amplifier (33), so that detector signals resulting from spectral features common to both detectors (30a, 30b) are canceled. The remaining signal (36) varies according to the amount of light that falls between wavelength boundaries [.lambda..sub.1 and (.lambda..sub.1 +.DELTA..lambda.)]. A preferred method of fabricating the optical interference filters (24a, 24b) is also provided.

摘要翻译： 差分光谱系统检测非常窄带的光谱特征，同时提供比现有的基于光学滤光器的光谱仪系统更高的光透射率和信噪比。 多个光检测器（10a，10b）检测落入各个宽波段内的光。 宽波段具有重叠和不重叠的部分，其中一个是期望的窄波段。 操作检测器输出以产生输出信号（22），其基本上仅包括期望的窄波段。 在优选实施例中，光检测器（10a，10b）由一对光学检测器（30a，30b）和相应的光学干涉滤光器（24a，24b）来实现。 滤光器具有基本上相同的截止波长（λ2）和相对于彼此（λ1和（λ1+ΔTATAλ））偏移DELTAλ的截止波长。 检测器输出与运算放大器（33）不同，从而消除由两个检测器（30a，30b）共同的光谱特征产生的检测器信号。 剩余信号（36）根据波长边界（λ1和（λ1+ΔTATA））之间的光量而变化。 还提供了制造光学干涉滤光器（24a，24b）的优选方法。