公开(公告)号：US20180011306A1

公开(公告)日：2018-01-11

申请号：US15639915

申请日：2017-06-30

Applicant: Alakai Defense Systems, Inc.

Inventor： Robert Dean Babnick ,  Adam J. Hopkins ,  Nicholas M. Ventola

IPC: G02B23/06 ,  G01S7/481 ,  G01S17/93 ,  G02B7/09

CPC classification number: G02B23/06 ,  G01S7/4802 ,  G01S7/481 ,  G01S7/4816 ,  G01S17/023 ,  G01S17/88 ,  G01S17/936 ,  G02B7/08 ,  G02B7/09

Abstract: An apparatus, system, and method of focus compensation for a vehicle-mounted, downward looking optical detection system. A first stage compensator addresses high frequency events needing rapid, small displacement compensation. A second stage compensator addresses lower frequency but sometimes larger displacement compensation.

公开(公告)号：US09905990B1

公开(公告)日：2018-02-27

申请号：US14689964

申请日：2015-04-17

Applicant: Alakai Defense Systems, Inc.

Inventor： Ken Pohl ,  Matthew King ,  Adam J. Hopkins ,  Alan Ford

IPC: H01S3/106 ,  G01N21/65 ,  H01S3/08 ,  H01S3/1055 ,  H01S3/107

CPC classification number: H01S3/1062 ,  G01J3/44 ,  G01N21/65 ,  H01S3/025 ,  H01S3/08054 ,  H01S3/0809 ,  H01S3/0823 ,  H01S3/105 ,  H01S3/1055 ,  H01S3/1068 ,  H01S3/107

Abstract: A system, apparatus, and method for multiple wavelength Raman interrogation laser generation and Raman spectra acquisition. An intracavity laser tuning subsystem is integrated into the laser cavity. The tuning subsystem allows switching between at least two laser output frequencies in a manner effective for good identification and separation of Raman spectra from non-Raman spectra, including auto-fluorescence from the sample and background. The tuning subsystem can be implemented in different ways in the cavity. It does not require material alteration of the line-narrowing components. Also, processing of acquired raw signal from the multiple wavelength interrogation can further assist effective Raman spectra identification and separation.

公开(公告)号：US20160103073A1

公开(公告)日：2016-04-14

申请号：US14883269

申请日：2015-10-14

Applicant: Alakai Defense Systems, Inc.

Inventor： Alan R. Ford ,  Adam J. Hopkins

IPC: G01N21/65 ,  G01N33/22

CPC classification number: G01N21/65 ,  G01J3/0224 ,  G01J3/0237 ,  G01J3/0262 ,  G01J3/0272 ,  G01J3/0291 ,  G01J3/28 ,  G01J3/44 ,  G01J2003/4424 ,  G01N33/227 ,  G01N2021/1793 ,  G01N2201/0683 ,  G01N2201/121

Abstract: A method for utilizing polarization as a scheme for fluorescence removal from UV Raman spectra collected in a standoff detection scheme has been invented. In this scheme, a linearly polarized ultraviolet (UV) laser interacts with a material on a surface or in a container. The material generates Raman scattering with polarization contributions relative to that of the laser. The material possibly fluoresces as well, but the fluorescence is generally unpolarized. By subtracting a scaled version of the perpendicular component from the parallel component of the returned signal both relative to the laser source polarization—it is possible to generate a spectrum that is fluorescence free and contains the strongest features of the Raman scattered light.

Abstract translation: 已经发明了利用偏振作为在间隔检测方案中收集的UV拉曼光谱进行荧光去除的方案的方法。 在该方案中，线偏振紫外（UV）激光与表面或容器中的材料相互作用。 该材料产生相对于激光的偏振贡献的拉曼散射。 该材料也可能发荧光，但荧光通常是非极化的。 通过从相对于激光源极化的返回信号的并行分量中减去垂直分量的缩放版本，可以产生无荧光的光谱，并且包含拉曼散射光的最强特征。