公开(公告)号：US4981362A

公开(公告)日：1991-01-01

申请号：US422319

申请日：1989-10-16

Applicant: Joannes N. M. deJong ,  Gerald A. Domoto ,  John J. Ricciardelli ,  Gerhard H. Bay ,  Johann H. Metternich

Inventor： Joannes N. M. deJong ,  Gerald A. Domoto ,  John J. Ricciardelli ,  Gerhard H. Bay ,  Johann H. Metternich

IPC: G01N15/06 ,  G01J1/16 ,  G01N21/53 ,  G01N21/59

CPC classification number: G01N21/534 ,  G01J2001/1615 ,  G01N2021/1759 ,  G01N2201/066 ,  G01N2201/0695

Abstract: The method and apparatus for measuring the particle concentration in a fluid that is passed between a reciprocally movable window and a single photodetector. A collimated beam of light is directed through the window and fluid to the photodetector. The window is moved from a first predetermined location to a second predetermined location to vary the light beam path length, thus enabling at least two different photodetector output signals. The ratio of the two signals provides the data needed to determine the particle concentration in the fluid.

Abstract translation: 用于测量在可往复运动的窗口和单个光电检测器之间通过的流体中的颗粒浓度的方法和装置。 准直光束被引导通过窗口，流体被引导到光电检测器。 窗口从第一预定位置移动到第二预定位置以改变光束路径长度，从而使得能够至少两个不同的光电检测器输出信号。 两个信号的比率提供了确定流体中颗粒浓度所需的数据。

公开(公告)号：US20180278927A1

公开(公告)日：2018-09-27

申请号：US15926184

申请日：2018-03-20

Applicant: AZBIL CORPORATION

Inventor： Kouichiro Murata

IPC: H04N17/00 ,  G01N21/93 ,  G01J1/16

CPC classification number: H04N17/004 ,  G01J1/0228 ,  G01J1/16 ,  G01J1/18 ,  G01J2001/1615 ,  G01N21/93 ,  G02F1/1309 ,  G05B23/0283

Abstract: A diagnosis unit determines a first degradation degree of a display device on the basis of a measured illuminance calculated from an output of a photo sensor, compares the first degradation degree with a degradation threshold, and outputs a corresponding diagnosis when the first degradation degree reaches the degradation threshold.

公开(公告)号：US5266792A

公开(公告)日：1993-11-30

申请号：US783503

申请日：1991-10-28

Applicant: David H. Crowne ,  William B. Spillman, Jr.

Inventor： David H. Crowne ,  William B. Spillman, Jr.

IPC: G01J1/16 ,  G01J1/18 ,  G01J1/42 ,  G01J1/44 ,  G01J3/10 ,  G01J3/50 ,  G01J9/00 ,  H01J40/14

CPC classification number: G01J9/00 ,  G01J1/18 ,  G01J3/10 ,  G01J3/50 ,  G01J2001/1615 ,  G01J2001/444

Abstract: An optical wavelength detector includes a photoelectric device that produces a signal in response to incident light thereon corresponding to a characteristic of the incident light such as wavelength. A light source is provided that can selectively expose light to the photoelectric device. A memory device stores device characterization data that corresponds wavelength information to current ratio signals from the photoelectric device. The current ratio signals are digitized and form part of the address for the memory. In a temperature compensated embodiment, the optical wavelength detector includes means to determine a temperature dependent electrical characteristic of the photoelectric device. In the preferred embodiment this electrical characteristic is the forward bias voltage detected when a predetermined forward bias current is applied to the photoelectric device in the dark. The temperature dependent forward bias voltage is converted to a digital signal and provides another part of the digital address for the memory. The memory generates a temperature compensated signal that corresponds to the incident light wavelength.

Abstract translation: 光波长检测器包括光电装置，其响应于入射光的入射光而产生对应于诸如波长的入射光的特性的信号。 提供可以选择性地将光暴露于光电装置的光源。 存储器件将来自光电器件的电流比信号对应于波长信息的器件表征数据存储。 电流比率信号被数字化并形成存储器地址的一部分。 在温度补偿实施例中，光波长检测器包括用于确定光电器件的温度依赖性电特性的装置。 在优选实施例中，该电特性是当在黑暗中将预定的正向偏置电流施加到光电装置时检测到的正向偏压。 温度相关的正向偏置电压被转换为数字信号，并为存储器提供数字地址的另一部分。 存储器产生对应于入射光波长的温度补偿信号。