公开(公告)号：US09103715B1

公开(公告)日：2015-08-11

申请号：US14212542

申请日：2014-03-14

Applicant: Joseph R. Demers

Inventor： Joseph R. Demers ,  Bryon L. Kasper

IPC: G01J5/02 ,  G01J3/02

CPC classification number: G01J3/28 ,  G01J3/42 ,  G01J3/433

Abstract: Apparatus for analyzing, identifying, or imaging a target is configured to avoid and/or prevent nulls that may occur periodically during a terahertz sweep. Exemplary apparatus may utilize a second harmonic lock-in amplifier to generate an error signal used to adjust a DC bias of a phase modulator to maintain an in-phase relationship between beams to avoid nulls in an output signal during frequency sweeping.

Abstract translation: 用于分析，识别或成像目标的装置被配置为避免和/或防止在太赫兹扫描期间周期性发生的零点。 示例性装置可以利用二次谐波锁定放大器来产生用于调整相位调制器的DC偏置的误差信号，以维持波束之间的同相关系，以避免在扫频期间输出信号中的零点。

公开(公告)号：US08957377B2

公开(公告)日：2015-02-17

申请号：US14054599

申请日：2013-10-15

Applicant: Ronald T. Logan ,  Joseph R. Demers

Inventor： Ronald T. Logan ,  Joseph R. Demers

IPC: G01N21/39 ,  G01J3/427 ,  A61B5/05 ,  G01J3/10 ,  G01J3/42 ,  G01J3/453 ,  G01N21/3581 ,  G01N21/3586

CPC classification number: G01J3/427 ,  A61B5/0507 ,  G01J3/10 ,  G01J3/42 ,  G01J3/4531 ,  G01N21/3581 ,  G01N21/3586 ,  G01N21/39

Abstract: An apparatus for analyzing, identifying or imaging an target including first and second laser beams coupled to a pair of photoconductive switches to produce CW signals in one or more bands in a range of frequencies greater than 100 GHz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral heterodyne process to generate an electrical signal representative of some characteristics of the target. The lasers are tuned to different frequencies and a frequency shifter in the path of one laser beam allows the terahertz beam to be finely adjusted in one or more selected frequency bands.

Abstract translation: 一种用于分析，识别或成像目标的装置，包括耦合到一对光电导开关的第一和第二激光束，以在大于100GHz的频率的范围内的一个或多个频带中产生CW信号，该信号集中于并经由 目标; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱外差处理产生表示目标的某些特性的电信号。 将激光器调谐到不同的频率，并且在一个激光束的路径中的频移器允许在一个或多个所选频带中微调太赫兹波束。

公开(公告)号：US20110133090A1

公开(公告)日：2011-06-09

申请号：US12634422

申请日：2009-12-09

Applicant: Joseph R. Demers ,  Ronald T. Logan, JR.

Inventor： Joseph R. Demers ,  Ronald T. Logan, JR.

IPC: G01N21/35 ,  G01N21/27 ,  G01N21/84

CPC classification number: G01N21/3586 ,  G01N21/3563

Abstract: Disclosed herein are methods of detecting organic materials, and more particularly, methods of detecting organic materials using terahertz spectroscopy. The method of detecting organic material using terahertz spectroscopy includes suspending organic material in a medium to form a sample; irradiating the sample with an illumination beam of electromagnetic radiation, the illumination beam having a plurality of frequencies in the range of about 100 GHz to about 2 THz; detecting radiation transmitted through and/or reflected from the sample; and, analyzing the detected radiation to identify the organic material, wherein the medium is selected from the group consisting of agar, guar gum, gellan gum, carrageenan, xantham gum, fibrous sodium pectate, and other agar substitutes.

Abstract translation: 本文公开了检测有机材料的方法，更具体地，使用太赫兹光谱法检测有机材料的方法。 使用太赫兹光谱检测有机材料的方法包括将有机材料悬浮在介质中以形成样品; 用电磁辐射的照明光照射样品，该照明光束具有约100GHz至约2THz范围内的多个频率; 检测通过和/或从样品反射的辐射; 并且分析所检测的辐射以鉴定有机材料，其中所述培养基选自琼脂，瓜尔胶，结冷胶，角叉菜胶，黄芩胶，纤维状果胶酸钠等琼脂替代物。

公开(公告)号：US07936453B2

公开(公告)日：2011-05-03

申请号：US12062772

申请日：2008-04-04

Applicant: Ronald T. Logan, Jr. ,  Joseph R. Demers ,  Bryon L. Kasper

Inventor： Ronald T. Logan, Jr. ,  Joseph R. Demers ,  Bryon L. Kasper

IPC: G01N21/21

CPC classification number: G01J3/42 ,  G01J3/10 ,  G01N21/3581

Abstract: An apparatus for analyzing, identifying or imaging a target including an integrated dual laser module coupled to a pair of photoconductive switches to produce CW signals in the range of frequencies from 100 GHz to over 2 THz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral homodyne process to generate an electrical signal representative of some characteristics of the target with resolution less than 250 MHz. The photoconductive switches are activated by laser beams from the dual laser module. The lasers in the module are tuned to different frequencies and have two distinct low frequency identification tones respectively that are used in conjunction with a stable optical filter element to permit precise determination of the offset frequency of the lasers.

Abstract translation: 一种用于分析，识别或成像目标的装置，所述目标包括耦合到一对光电导开关的集成双激光模块，以产生在从100GHz到超过2THz的频率范围内的CW信号，其聚焦并经由目标传送或反射; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱零差处理来产生表示具有小于250MHz的分辨率的目标的某些特性的电信号。 光导开关由来自双激光模块的激光束激活。 模块中的激光器被调谐到不同的频率，并且具有分别与稳定的光学滤波器元件结合使用的两个不同的低频识别音，以允许精确地确定激光器的偏移频率。

公开(公告)号：US20090002851A1

公开(公告)日：2009-01-01

申请号：US12198452

申请日：2008-08-26

Applicant: Nathan G. Woodard ,  Eric C. Johnson ,  Jon F. Nielsen ,  Joseph R. Demers ,  Chien-Chung Chen

Inventor： Nathan G. Woodard ,  Eric C. Johnson ,  Jon F. Nielsen ,  Joseph R. Demers ,  Chien-Chung Chen

IPC: G02B7/02

CPC classification number: G02B7/00

Abstract: An optical assembly includes a light path and at least one optic to be positioned in the path. A support arrangement supports the optic having a foot arrangement including at least one foot that receives a direct manipulation with the foot slidingly engaged against a support surface to move the optic relative to the light path. Movement of the foot may move the optic along a predetermined path. The foot defines a footprint for engaging the support surface and receives the direct manipulation in a way which changes the footprint on the support surface to move the optic responsive to changes in the footprint. A movement arrangement may selectively bias the foot against the support surface during a movement mode, intended to permit movement of the foot against the support surface, and in a locked mode, intended to lock the foot against the support surface.

Abstract translation: 光学组件包括光路和要定位在路径中的至少一个光学元件。 支撑装置支撑光学元件，其具有足部布置，其包括至少一个脚，其接收直接操纵，脚与滑​​动地抵靠支撑表面接合以相对于光路移动光学元件。 脚的运动可以沿着预定的路径移动光学元件。 脚定义了用于接合支撑表面的足迹，并且以一种方式接收直接操纵，其改变了支撑表面上的占地面积，以响应于占地面积的变化来移动光学器件。 移动装置可以在移动模式期间选择性地将脚抵靠支撑表面偏置，以允许脚抵靠支撑表面移动，并且处于锁定模式，以将脚锁定在支撑表面上。

公开(公告)号：US20080179528A1

公开(公告)日：2008-07-31

申请号：US11796069

申请日：2007-04-26

Applicant: Joseph R. Demers

Inventor： Joseph R. Demers

IPC: G01J5/02 ,  G01J5/00

CPC classification number: G01J3/42 ,  G01N21/3581 ,  G01N2201/0221

Abstract: An apparatus for analyzing, identifying or imaging an target including a source of pulsed signals in the range of frequencies from 100 GHz to over 2 THz focused on or transmitted through the target; and a detector for acquiring spectral information from signals reflected from the target and using a multi-spectral heterodyning process to generate an electrical signal representative of some characteristics of the target. The source of pulse signals and the detector are photoconductive switches activated by a pulsed laser beam from a single mode-locked laser.

Abstract translation: 一种用于分析，识别或成像目标的装置，所述目标包括聚焦在所述目标上或透过所述目标的从100GHz到超过2THz的频率范围内的脉冲信号源; 以及检测器，用于从从目标反射的信号中获取光谱信息，并使用多光谱外差处理来产生表示目标的某些特性的电信号。 脉冲信号源和检测器是由来自单个锁模激光器的脉冲激光束激活的光电导开关。

公开(公告)号：US09404853B1

公开(公告)日：2016-08-02

申请号：US14262291

申请日：2014-04-25

Applicant: Joseph R. Demers

Inventor： Joseph R. Demers ,  Bryon L. Kasper

IPC: G01J5/02 ,  G01N21/3581 ,  G01J3/28

CPC classification number: G01N21/3581 ,  G01J3/28 ,  G01J3/42 ,  G01J3/433 ,  G01N21/3586

Abstract: A highly advantageous terahertz spectrometer with phase modulation and associated method are disclosed which utilize a second harmonic for generating an error signal to control a phase modulator to at least reduce nulls of an interference pattern.

Abstract translation: 公开了一种具有相位调制和相关方法的非常有利的太赫兹光谱仪，其利用二次谐波来产生误差信号以控制相位调制器以至少减小干涉图案的零点。

公开(公告)号：US09052238B2

公开(公告)日：2015-06-09

申请号：US14033114

申请日：2013-09-20

Applicant: Ronald T. Logan, Jr. ,  Joseph R. Demers

Inventor： Ronald T. Logan, Jr. ,  Joseph R. Demers

IPC: G01N21/35 ,  G01J3/427 ,  G01J3/10 ,  G01J3/42 ,  G01J3/453 ,  G01N21/3581 ,  G01N21/39

CPC classification number: G01J3/427 ,  A61B5/0507 ,  G01J3/10 ,  G01J3/42 ,  G01J3/4531 ,  G01N21/3581 ,  G01N21/3586 ,  G01N21/39

Abstract: An apparatus for analyzing, identifying or imaging an target including first and second laser beams coupled to a pair of photoconductive switches to produce CW signals in one or more bands in a range of frequencies greater than 100 GHz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral heterodyne process to generate an electrical signal representative of some characteristics of the target. The lasers are tuned to different frequencies and a frequency shifter in the path of one laser beam allows the terahertz beam to be finely adjusted in one or more selected frequency bands.

Abstract translation: 一种用于分析，识别或成像目标的装置，包括耦合到一对光电导开关的第一和第二激光束，以在大于100GHz的频率的范围内的一个或多个频带中产生CW信号，该信号集中于并经由 目标; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱外差处理产生表示目标的某些特性的电信号。 将激光器调谐到不同的频率，并且在一个激光束的路径中的频移器允许在一个或多个所选频带中微调太赫兹波束。

公开(公告)号：US08716666B1

公开(公告)日：2014-05-06

申请号：US12813359

申请日：2010-06-10

Applicant: Joseph R. Demers ,  Ronald T. Logan, Jr.

Inventor： Joseph R. Demers ,  Ronald T. Logan, Jr.

IPC: G01J5/02

CPC classification number: G01J3/42 ,  G01J3/0208 ,  G01J3/10 ,  G01N21/3581 ,  G01N21/94 ,  G01N33/04

Abstract: Disclosed herein is a method of detecting a contaminant material in a food sample. The method includes irradiating a food sample with a beam of electromagnetic radiation, the beam having a plurality of frequencies in the range of about 100 GHz to about 2 THz; detecting radiation transmitted and/or reflected from the food sample; and, analyzing the detected radiation to determine the presence of contaminant material. The contaminant material may be melamine, cyanuric acid, ammeline, or ammelide.

Abstract translation: 本文公开了一种检测食品样品中的污染物质的方法。 该方法包括用电磁辐射束照射食物样品，该束具有在约100GHz至约2THz范围内的多个频率; 检测从食物样品发射和/或反射的辐射; 并且分析检测到的辐射以确定污染物质的存在。 污染物质可以是三聚氰胺，氰尿酸，ammeline或ammelide。

公开(公告)号：US08604433B2

公开(公告)日：2013-12-10

申请号：US12861651

申请日：2010-08-23

Applicant: Ronald T. Logan, Jr. ,  Joseph R. Demers

Inventor： Ronald T. Logan, Jr. ,  Joseph R. Demers

IPC: G01T1/17 ,  G01J5/20 ,  H04N5/33

CPC classification number: G01J3/427 ,  A61B5/0507 ,  G01J3/10 ,  G01J3/42 ,  G01J3/4531 ,  G01N21/3581 ,  G01N21/3586 ,  G01N21/39

Abstract: An apparatus for analyzing, identifying or imaging an target including first and second laser beams coupled to a pair of photoconductive switches to produce CW signals in one or more bands in a range of frequencies greater than 100 GHz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral heterodyne process to generate an electrical signal representative of some characteristics of the target. The lasers are tuned to different frequencies and a frequency shifter in the path of one laser beam allows the terahertz beam to be finely adjusted in one or more selected frequency bands.

Abstract translation: 一种用于分析，识别或成像目标的装置，包括耦合到一对光电导开关的第一和第二激光束，以在大于100GHz的频率的范围内的一个或多个频带中产生CW信号，该信号集中于并经由 目标; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱外差处理产生表示目标的某些特性的电信号。 将激光器调谐到不同的频率，并且在一个激光束的路径中的频移器允许在一个或多个所选频带中微调太赫兹波束。