公开(公告)号：US09448155B2

公开(公告)日：2016-09-20

申请号：US14740676

申请日：2015-06-16

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Yongle Pan

IPC: G01N1/00 ,  G01N15/14 ,  G01N21/65 ,  G01N15/00

CPC classification number: G01N15/1434 ,  G01N15/1463 ,  G01N21/65 ,  G01N2015/0065

Abstract: A system for trapping particles in a gas comprising a chamber; an intake for intake of a gas containing at least one particle to be trapped and released, and an outlet for exit of the gas out of the chamber containing at least one particle; a first passage operatively connected to the intake operating to create a flow of a gas containing at least one particle into the chamber, a second passage operatively connected to the outlet for flow of the gas; a third passage operatively connected to a gaseous flow for creating a flow of fluid in a direction substantially opposite to the transfer of gas from the first passage so as to counteract the flow of gas from the first passage; an image sensor for recording an image; and a laser for generating a light beam for forming a photophoretic trap between the first and third passages.

Abstract translation: 一种用于在包括腔室的气体中捕集颗粒的系统; 用于摄入含有至少一个被捕获和释放的颗粒的气体的入口和用于从包含至少一个颗粒的室中排出气体的出口; 第一通道，其操作性地连接到进气口，以操作以产生包含至少一个颗粒的气体流入所述室;第二通道，其可操作地连接到所述出口，用于气体流动; 第三通道，其可操作地连接到气流，用于在与第一通道的气体转移基本相反的方向上产生流体流，以抵消来自第一通道的气体流动; 用于记录图像的图像传感器; 以及激光器，用于产生用于在第一和第三通道之间形成光刻陷阱的光束。

公开(公告)号：US09222874B2

公开(公告)日：2015-12-29

申请号：US13793556

申请日：2013-03-11

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Steven C. Hill ,  Yongle Pan

IPC: G01N21/01 ,  G01N21/65 ,  G01N15/14

CPC classification number: G01N21/01 ,  G01N15/14 ,  G01N21/65

Abstract: Embodiments of the present invention are directed to systems and methods for continuously sampling particles from air. In one embodiment, a system for continuously sampling particles from air may include: an airflow system configured to continuously draw air including airborne particles into the system; a photophoretic trap that uses photophoretic forces of a laser beam to trap one or more of the airborne particles from the drawn air; a measurement device configured to measure one or more properties of the trapped one or more airborne particles; and a controller configured to repeatedly trap, measure and release one or more airborne particles.

Abstract translation: 本发明的实施例涉及从空气中连续取样颗粒的系统和方法。 在一个实施例中，用于从空气中连续采样颗粒的系统可以包括：气流系统，被配置为将包括空气传播的颗粒的空气连续地抽吸到系统中; 使用激光束的光致力从捕获的空气中捕获一种或多种空气中的颗粒的光致陷阱; 被配置为测量被捕获的一种或多种空气传播颗粒的一种或多种性质的测量装置; 以及控制器，被配置为重复地捕获，测量和释放一个或多个空气中的颗粒。

公开(公告)号：US20140004559A1

公开(公告)日：2014-01-02

申请号：US13793556

申请日：2013-03-11

Applicant: U.S. ARMY RESEARCH LABORATORY ATTN: RDRL-LOC-I

Inventor： Steven C. Hill ,  Yongle Pan

IPC: G01N21/01 ,  G01N21/65

CPC classification number: G01N21/01 ,  G01N15/14 ,  G01N21/65

Abstract: Embodiments of the present invention are directed to systems and methods for continuously sampling particles from air. In one embodiment, a system for continuously sampling particles from air may include: an airflow system configured to continuously draw air including airborne particles into the system; a photophoretic trap that uses photophoretic forces of a laser beam to trap one or more of the airborne particles from the drawn air; a measurement device configured to measure one or more properties of the trapped one or more airborne particles; and a controller configured to repeatedly trap, measure and release one or more airborne particles.

Abstract translation: 本发明的实施例涉及从空气中连续取样颗粒的系统和方法。 在一个实施例中，用于从空气中连续采样颗粒的系统可以包括：气流系统，被配置为将包括空气传播的颗粒的空气连续地抽吸到系统中; 使用激光束的光致力从捕获的空气中捕获一种或多种空气中的颗粒的光致陷阱; 被配置为测量被捕获的一种或多种空气传播颗粒的一种或多种性质的测量装置; 以及控制器，被配置为重复地捕获，测量和释放一个或多个空气中的颗粒。

公开(公告)号：US20160260513A1

公开(公告)日：2016-09-08

申请号：US14638536

申请日：2015-03-04

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Yongle Pan ,  Brandon F. Redding

IPC: G21K1/00 ,  H05H3/04

CPC classification number: H05H3/04 ,  G01N15/1056 ,  G01N15/1434 ,  G01N15/1484 ,  G01N2015/1493 ,  G01N2015/1497 ,  G02B27/0018

Abstract: Embodiments of the present invention are directed to systems and methods for trapping and holding airborne particles. In the various embodiments, an optical trap is provided which uses a focused hollow-beam for trapping and holding both absorbing and non-absorbing airborne particles. The optical trap comprises: a trapping region where a particle can be present to be trapped; a light source for generating a coherent beam of light; optics for forming a hollow beam having a ring geometry from the coherent beam of light; and a focusing element for focusing the hollow beam to a point in the trapping region. In this arrangement, the particle is trapped at or near the focal point of the focused hollow beam.

Abstract translation: 本发明的实施例涉及用于捕获和保持空气传播颗粒的系统和方法。 在各种实施例中，提供了一种光阱，其使用聚焦的中空束来捕获和保持吸收和非吸收空气中的颗粒。 光阱包括：捕获区域，其中可以存在待捕获的颗粒; 用于产生相干光束的光源; 用于形成具有来自相干光束的环几何形状的空心光束的光学器件; 以及用于将空心束聚焦到捕获区域中的一个点的聚焦元件。 在这种布置中，颗粒被捕获在聚焦的空心束的焦点处或附近。