公开(公告)号：US09869625B2

公开(公告)日：2018-01-16

申请号：US14345073

申请日：2012-09-11

Applicant: David Michael Spriggs ,  Duncan Stephenson

Inventor： David Michael Spriggs ,  Duncan Stephenson

IPC: G01N15/02 ,  G01N21/47 ,  G01N21/49

CPC classification number: G01N15/0205 ,  G01N15/0211 ,  G01N21/47 ,  G01N21/49 ,  G01N2201/06113 ,  G01N2201/062

Abstract: Apparatus (100) for measuring particle size distribution by light scattering comprises a blue LED (102) and a 633 nm helium neon laser (104). Light output from the LED and laser is separately passed or reflected by a dichroic element (116) onto a common path through a sample cell (122) containing a sample, the particle size distribution of which is to be measured. Light scattered from the sample cell is detected by one or more detectors (112B-H). Light transmitted by the sample cell is detected by detectors 112A, 112J. Output signals from one or more of the detectors are passed to a computation unit (114) which calculates particle size distribution. A small percentage of light from the blue LED is reflected by the dichroic element to a detector (110). Similarly, a small percentage of light from the laser is passed by the dichroic element to the detector. Output signals from the detector are fed back to control units (106, 108) to stabilize the output power of the LED and laser.

公开(公告)号：US20150138550A1

公开(公告)日：2015-05-21

申请号：US14345073

申请日：2012-09-11

Applicant: David Michael Spriggs ,  Duncan Stephenson

Inventor： David Michael Spriggs ,  Duncan Stephenson

IPC: G01N15/02 ,  G01N21/47

CPC classification number: G01N15/0205 ,  G01N15/0211 ,  G01N21/47 ,  G01N21/49 ,  G01N2201/06113 ,  G01N2201/062

Abstract: Apparatus (100) for measuring particle size distribution by light scattering comprises a blue LED (102) and a 633 nm helium neon laser (104). Light output from the LED and laser is separately passed or reflected by a dichroic element (116) onto a common path through a sample cell (122) containing a sample, the particle size distribution of which is to be measured. Light scattered from the sample cell is detected by one or more detectors (112B-H). Light transmitted by the sample cell is detected by detectors 112A, 112J. Output signals from one or more of the detectors are passed to a computation unit (114) which calculates particle size distribution. A small percentage of light from the blue LED is reflected by the dichroic element to a detector (110). Similarly, a small percentage of light from the laser is passed by the dichroic element to the detector. Output signals from the detector are fed back to control units (106, 108) to stabilise the output power of the LED and laser.

Abstract translation: 用于通过光散射测量粒度分布的装置（100）包括蓝色LED（102）和633nm氦氖激光器（104）。 来自LED和激光器的光输出被二色性元件（116）分开通过或者通过包含待测量的粒度分布的样品的样品池（122）通过共通路径反射。 从一个或多个检测器（112B-H）检测从样品池散射的光。 由检测器112A，112J检测由样品池传输的光。 来自一个或多个检测器的输出信号被传递到计算粒子分布的计算单元（114）。 来自蓝色LED的一小部分光被二色性元件反射到检测器（110）。 类似地，来自激光器的一小部分光通过二向色元件传递到检测器。 来自检测器的输出信号被反馈到控制单元（106,108），以稳定LED和激光器的输出功率。