公开(公告)号：US5138149A

公开(公告)日：1992-08-11

申请号：US578538

申请日：1990-09-05

Applicant: Raymond J. Cadet ,  Hung-Nan Chao ,  Sing-wing Hui ,  Eric Bogatin ,  Steven C. Leach

Inventor： Raymond J. Cadet ,  Hung-Nan Chao ,  Sing-wing Hui ,  Eric Bogatin ,  Steven C. Leach

IPC: G01J1/44 ,  G01N21/27

CPC classification number: H01J37/32963 ,  G01N21/27 ,  G01J2001/4406 ,  G01N21/4738 ,  G01N2201/0621 ,  G01N2201/1222 ,  G01N2201/124

Abstract: A sensor board for use with an endpoint controller which monitors light intensity is provided. The sensor board can provide a dynamic range of up to five million because a constant current driver and phase sensitive detector help eliminate noise from the detected signal. The sensor board can also subtract a DC voltage offset from the detected signal and amplify the difference to provide increased resolution of small changes in the detected signal.

Abstract translation: 提供了一种用于监视光强度的端点控制器的传感器板。 传感器板可以提供高达500万的动态范围，因为恒定电流驱动器和相位敏感检测器有助于消除检测到的信号中的噪声。 传感器板还可以从检测到的信号中减去直流电压偏移，并放大差值，以提高检测信号的小变化分辨率。

公开(公告)号：US5066132A

公开(公告)日：1991-11-19

申请号：US564167

申请日：1990-08-08

Applicant: Tsuyoshi Nagata ,  Shinji Okuda

Inventor： Tsuyoshi Nagata ,  Shinji Okuda

IPC: G01J1/16 ,  G01J1/18 ,  G01J1/30 ,  G01J1/44 ,  G01N21/84 ,  G01N21/86 ,  G01N21/958

CPC classification number: G01J1/16 ,  G01N21/8422 ,  G01N21/86 ,  G01N21/958 ,  G01J1/18 ,  G01J1/30 ,  G01J2001/4406 ,  G01N2021/8427 ,  G01N2201/0696 ,  G01N2201/124 ,  G01N2201/12723

Abstract: An apparatus for inspecting a coating formed on a workpiece, comprising a light emitter and a light receiver positioned on respective sides of the workpiece; an amplifier for amplifying a detection signal from the light receiver and for generating an amplified output signal; a comparator for comparing the amplified output signal with a predetermined level thereby to generate a control signal indicative of a difference between the amplified output signal and the predetermined level; a zero adjustment for adjusting the amplified output signal to a zero value; and a tuning circuit for tuning the amplified output signal, which is generated from the amplifier when the workpiece to be inspected has not yet been formed with the coating, to a predetermined tuned value. The tuning circuit is operable to vary the amplification factor of the amplifier and also to the intensity of light emitted by the light emitter. In place of the tuning circuit, an amplification factor setting citcuit may be used for sampling the light transmissivity of the workpiece and for selecting one of amplification factors according to the result of sampling. After the formation of the coating on the workpiece, the amplified output signal may decrease with a decrease of the light transmissivity of the workpiece, and the coating condition is determined depending on whether or not the amplified output signal is lower than the predetermined level.

Abstract translation: 一种用于检查在工件上形成的涂层的装置，包括位于工件的相应侧面上的光发射器和光接收器; 放大器，用于放大来自光接收器的检测信号并产生放大的输出信号; 比较器，用于将放大的输出信号与预定电平进行比较，从而产生指示放大的输出信号与预定电平之间的差的控制信号; 用于将放大的输出信号调整为零值的零调整; 以及调谐电路，用于当待检查的工件尚未形成涂层时，将放大器产生的放大的输出信号调谐到预定的调谐值。 调谐电路可操作以改变放大器的放大系数以及光发射器发射的光的强度。 代替调谐电路，可以使用放大因子设置电路来对工件的光透射率进行采样，并根据采样结果选择一个放大因子。 在工件上形成涂层之后，放大的输出信号可能随着工件的光透射率的降低而减小，并且根据放大的输出信号是否低于预定电平来确定涂覆条件。

公开(公告)号：US5047620A

公开(公告)日：1991-09-10

申请号：US457124

申请日：1989-12-26

Applicant: L. N. Durvasula ,  William K. Krug ,  Gary P. Stevenson

Inventor： L. N. Durvasula ,  William K. Krug ,  Gary P. Stevenson

IPC: G01J1/42 ,  G01J1/44 ,  G01J3/12 ,  G01J9/00

CPC classification number: G01J9/00 ,  G01J2001/4238 ,  G01J2001/4406 ,  G01J2001/444 ,  G01J2003/1226

Abstract: A radiation detection system for use in the visible and near infrared reg which is capable of detecting and recording extremely weak laser pulses in the few nanoseconds range. The system receiver can be directed towards strong radiation sources, such as the sun, without changing the receiver or recording unwanted information. The detection system discriminates between various selected laser sources wavelengths and is comprised of optics, detector, electronic hardware, microcomputer, and signature analysis algorithm.

Abstract translation: 一种用于可见光和近红外区域的辐射检测系统，其能够在几纳秒范围内检测和记录极弱的激光脉冲。 系统接收器可以指向强辐射源，例如太阳，而不改变接收器或记录不需要的信息。 检测系统鉴别各种选择的激光源波长，并由光学，检测器，电子硬件，微型计算机和签名分析算法组成。

公开(公告)号：US4700059A

公开(公告)日：1987-10-13

申请号：US839105

申请日：1986-03-13

Applicant: Thomas R. Tullsen

Inventor： Thomas R. Tullsen

IPC: G01J1/16 ,  G01J1/44 ,  G01N21/00 ,  G01N21/27 ,  G01N30/74 ,  G01N30/86 ,  G01D18/00 ,  G12B13/00

CPC classification number: G01N30/8665 ,  G01J1/16 ,  G01N30/74 ,  G01J2001/161 ,  G01J2001/4406 ,  G01N2021/174 ,  G01N2030/626

Abstract: An optical detector is provided. The optical detector provides automatic zeroing of a logarithmic ration function in applications such as absorption meters, fluorometers and other chromatographic techniques.

Abstract translation: 提供光学检测器。 光学检测器在诸如吸收计，荧光计和其他色谱技术的应用中提供对数比例功能的自动归零。

公开(公告)号：US3818198A

公开(公告)日：1974-06-18

申请号：US28523972

申请日：1972-08-31

Applicant: KOLLMORGEN CORP

Inventor： WALKER R ,  MALOY R

IPC: G01D3/028 ,  G01J1/00 ,  G06F17/00 ,  G06F15/20

CPC classification number: G01J1/42 ,  G01J1/04 ,  G01J1/0418 ,  G01J1/0462 ,  G01J1/44 ,  G01J2001/4406

Abstract: A photometer system of the type having a photoelectric sensor receiving light through selectable different-sized apertures and selectable different density optical filters is provided with electronic circuitry including a numerical read-out means for automatically compensating the photo-sensor output in accordance with selected aperture and filter settings and for providing a direct numerical reading of the measured light. The circuitry automatically calculates the proper scale or multiplier of the direct reading, again in accordance with the selected apertures and filters, and provides a numerical display of such scale multiplier. Additionally, a gain control for changing the sensitivity of the photoelectric sensor is provided with an output indicative of the gain setting. This gain setting information is electronically fed to the computer along with the aperture and filter information for automatically computing and displaying the correct scale or multiplier factor from all of these independent variables.

Abstract translation: 具有通过可选择的不同尺寸的孔径接收光的光电传感器的类型的光度计系统和可选择的不同密度的光学滤波器被提供有电子电路，其包括用于根据所选择的光圈自动补偿光电传感器输出的数字读出装置， 滤波器设置，并提供测量光的直接数字读数。 电路根据选定的孔径和滤波器自动计算直读数的适当比例或乘数，并提供这种比例乘数的数值显示。 此外，用于改变光电传感器的灵敏度的增益控制被提供有指示增益设置的输出。 该增益设置信息与孔径和滤波器信息一起电子馈送到计算机，用于自动计算并显示来自所有这些独立变量的正确比例或乘数因子。

公开(公告)号：US20190204148A1

公开(公告)日：2019-07-04

申请号：US16236874

申请日：2018-12-31

Applicant: STMicroelectronics (Grenoble2) SAS

Inventor： Pascal Mellot

IPC: G01J1/44

CPC classification number: G01J1/44 ,  G01J2001/4406 ,  G01J2001/4466 ,  G01S7/4861 ,  G01S7/4863 ,  G01S7/4914 ,  G01S17/42 ,  G01S17/89 ,  G01S17/936

Abstract: A method for managing a dynamic range of an optical detection device illuminated by a modulated optical radiation, the method including: generating a detection signal from the modulated optical radiation; generating, based on the detection signal, a histogram including a plurality of histogram classes; comparing a chosen maximum value and a value of each histogram class of the plurality of histogram classes; and stopping a generation of the histogram in response to a determination that the value of any one of the plurality of histogram classes is equal to the maximum value.

公开(公告)号：US10012534B2

公开(公告)日：2018-07-03

申请号：US15318373

申请日：2014-07-02

Applicant: The Johns Hopkins University

Inventor： Andreas G. Andreou ,  Joseph H. Lin ,  Philippe O. Pouliquen ,  Charbel G. Rizk

IPC: G01J1/44 ,  H01L31/02 ,  H01L31/107 ,  H01L31/0352

CPC classification number: G01J1/44 ,  G01J2001/4406 ,  G01J2001/442 ,  G01J2001/4466 ,  G01J2001/448 ,  H01L31/02027 ,  H01L31/035272 ,  H01L31/107

Abstract: A photodetection circuit includes an avalanche photodiode and a mode switching circuit that may be configured to selectively switch an operating mode of the photodetection circuit between linear mode and Geiger mode. The photodetection circuit may further include a quenching circuit configured to quench and reset the avalanche photodiode in response to an avalanche event when the photodetection circuit is operated in Geiger mode. The photodetection circuit may additionally include an integration circuit configured to integrate photocurrent output by the photodiode and generate integrated charge units when the photodetection circuit is operated in linear mode. The photodetection circuit may also include a counter configured to count pulses output by the avalanche photodiode when the photodetection circuit is operated in Geiger mode and to count integrated charge units generated by the integration circuit when the photodetection circuit is operated in linear mode.

公开(公告)号：US20180180471A1

公开(公告)日：2018-06-28

申请号：US15843492

申请日：2017-12-15

Applicant: SICK AG

Inventor： Martin MARRA ,  Stefan SEITZ

IPC: G01J1/44 ,  G01J1/42 ,  G01S7/486 ,  G06K7/14

CPC classification number: G01J1/44 ,  G01J1/0252 ,  G01J1/4228 ,  G01J1/46 ,  G01J2001/4406 ,  G01J2001/444 ,  G01J2001/4466 ,  G01J2001/448 ,  G01S7/4863 ,  G01S7/4865 ,  G01S7/497 ,  G01S17/89 ,  G06K7/1408

Abstract: A light receiver (22) comprisinga plurality of avalanche photodiode elements (24), a first terminal (40) and a second terminal (42) for supplying a bias voltage so that the avalanche photodiode elements (24) are biased with a bias voltage above a breakdown voltage and thus operated in a Geiger mode, at least one temperature measuring element (44) for measuring an operating temperature of the avalanche photodiode elements (24) and a voltage compensation unit (46) for adapting the bias voltage to the operating temperature.

公开(公告)号：US20180180470A1

公开(公告)日：2018-06-28

申请号：US15830397

申请日：2017-12-04

Applicant: SICK AG

Inventor： Stefan SEITZ

IPC: G01J1/44

CPC classification number: G01J1/44 ,  G01J1/46 ,  G01J2001/4406 ,  G01J2001/442 ,  G01J2001/4466 ,  G01J2001/448 ,  G01S7/4863 ,  G01S7/4868 ,  G01S7/497 ,  G01S17/08 ,  G01S17/89 ,  H04B10/69

Abstract: A light receiver (22) having a plurality of avalanche photodiode elements (24) biased with a bias voltage above a breakdown voltage and thus operated in a Geiger mode in order to trigger a Geiger current upon light reception,wherein the avalanche photodiode elements (24) form a plurality of groups, wherein the light receiver (22) comprises a plurality of bias voltage terminals for supplying groups with different bias voltages and/or a plurality of readout circuits (60, 62, 64), each associated with a group (721-72n) and comprising a measurement path (60) and a blanking path (64) as well as a switching element (62) for selectively supplying the Geiger current, or a measurement current corresponding to the Geiger current, to the measurement path (60) or the blanking path (64).

公开(公告)号：US09923642B2

公开(公告)日：2018-03-20

申请号：US15538075

申请日：2015-02-23

Applicant: Mitsubishi Electric Corporation

Inventor： Satoshi Shirai ,  Masaki Noda

IPC: H04B10/06 ,  H04B10/00 ,  H04B10/12 ,  H04B10/17 ,  H04B10/69 ,  G01J1/44 ,  H04B10/40 ,  H01J40/14 ,  H03G3/20

CPC classification number: H04B10/6911 ,  G01J1/44 ,  G01J2001/4406 ,  G01J2001/4466 ,  H01J40/14 ,  H03G3/20 ,  H03G3/3084 ,  H04B10/152 ,  H04B10/40 ,  H04B10/69

Abstract: A light receiving device that receives a light signal includes: a plurality of avalanche photodiodes, in each of which receiving sensitivity is set in accordance with a bias signal that is provided; a plurality of level conversion units provided in association with the avalanche photodiodes, each of the level conversion units being configured to convert a level of a reference voltage for obtaining the bias signal so as to generate the bias signal and being configured to provide the bias signal to corresponding one of the avalanche photodiodes; and a control unit that generates a first control signal corresponding to a temperature of the light receiving device, and controls a level conversion amount of each of the level conversion units by using the first control signal.