公开(公告)号：EP0176448A3

公开(公告)日：1987-01-07

申请号：EP85401891

申请日：1985-09-26

Applicant: ELECTRICITE DE FRANCE Service National

Inventor： Gerardin, Jean-Pierre

IPC: H04B09/00 ,  G01J01/44 ,  G01S07/48 ,  H03G03/20

CPC classification number: H03G3/3084 ,  G01D5/26 ,  G01S7/4913 ,  H04B10/60

Abstract: Le détecteur est destiné à recevoir un faisceau lumineux modulé à une fréquence qui constitue le paramètre significa tif à mesurer. Il est notamment utilisable dans un appareil utilisant deux faisceaux de lumière cohérente provenant d'une même source, dont l'un est soumis au phénomène physique à étudier, qui affecte la fréquence, les deux faisceaux de lumière étant ensuite mélangés sur une photo diode à avalanche. Le détecteur comprend un circuit (28) de mesure du courant moyen traversant la photodiode à avalanche et des moyens (32) commandés par ce circuit et appliquant à la diode une tension de polarisation V telle que le courant moyen soit sensiblement égal à une valeur de consigne ajustable.

公开(公告)号：WO1996007084A1

公开(公告)日：1996-03-07

申请号：PCT/DE1995001150

申请日：1995-08-25

Applicant: REIME, Gerd

IPC: G01J01/44

CPC classification number: H03F3/08 ,  G01J1/46 ,  H04B10/69 ,  H04B10/6911

Abstract: A circuit is used to set the operating point of at least one opto-electronic component, e.g. a photodiode (10'), in which the opto-electronic component is part of a receiver for useful alternating light signals. In order to set the operating point below the saturation voltage of the opto-electronic component, a resistance circuit is connected in parallel with the opto-electronic component at least to compensate for direct light signals. The resistance circuit has a self-adjusting resistor, the resistance variation of which is at least voltage-dependent as soon as a given voltage below the saturation voltage is exceeded and thus loads the opto-electronic component until the set voltage is substantially attained. The compensation current required owing to the direct light is produced without an outside voltage in such a way that virtually no current need be taken from the power supply.

Abstract translation: 一个电路，用于设置至少一个光电元件的工作点，如 的光电二极管（10“），所述光电元件是交替的光有用信号的接收器的一部分。 要设置光电元件的饱和电压低于操作点，光电元件被连接在电阻器电路并联的至少为恒定的光信号的补偿。 电阻电路包括至少取决于一个自调节电阻上的电压改变其电阻，因为一旦超过饱和电压低于特定电压并因此带电光电元件，直到所述特定电压基本上达到。 这产生了必要的，因为DC光电流的补偿电流没有外部电压，使得几乎没有电流从电源被绘制被诱导。

公开(公告)号：EP0194778A3

公开(公告)日：1988-01-13

申请号：EP86301303

申请日：1986-02-24

Applicant: POLAROID CORPORATION

Inventor： Plummer, William T. ,  Baker, Philip G.

IPC: G03B07/28 ,  G01J01/44

CPC classification number: G03B7/28

Abstract: A photosensor arrangement for providing an exposure influencing control signal in a photographic camera apparatus includes an array of photoresponsive elements (P 1 -P 4 ) each arranged to have a different field of view, signal-generating means (R 14 -R 22 ) for generating the exposure-influencing signal in response to signals from the photoresponsive elements, and means (R 1 -R 8 ; D 1 -D 8 ; A,-As; 10-24) controlling the transmission of the output signals from the photoresponsive elements to the signal-generating means (R 14 -R 22 ) and operative to block the signal path to the signal-generating means from the photoresponsive element or elements detecting the highest and/or lowest scene light intensity, or from any photoresponsive element which detects a scene light intensity which is above a maximum light intensity threshold and/or any photosensitive element which detects a scene light intensity which is below a minimum light intensity threshold.

公开(公告)号：EP0026108A3

公开(公告)日：1982-04-07

申请号：EP80303354

申请日：1980-09-24

Applicant: PFIZER INC.

Inventor： Bax, Ronald Frank

IPC: G01J01/44

CPC classification number: G01T1/208 ,  G01J1/44

Abstract: A sample and hold auto-zeroing feedback circuit (22) is utilized to drive the dark current of a solid state photodiode (10) to zero in the absence of incident light photons. The just previously attained compensation is then held during a subsequent quantitative measurement cycle when the photodiode is illuminated. A plurality of linear (24) and/or nonlinear (28) signal processing stages may also be included within the auto-zero compensation feedback loop such that their normal offset errors are also simultaneously compensated.

Abstract translation: 采样和保持自动归零反馈电路（22）用于在不存在入射光子的情况下将固态光电二极管（10）的暗电流驱动为零。 然后在光电二极管被照亮时，在随后的定量测量周期期间保持刚刚获得的补偿。 多个线性（24）和/或非线性（28）信号处理级也可以被包括在自动归零补偿反馈回路内，使得它们的正常偏移误差也被同时补偿。

公开(公告)号：EP0046491A3

公开(公告)日：1984-05-16

申请号：EP81105140

申请日：1981-07-02

Applicant: Durst AG Fabrik Fototechnischer Apparate

Inventor： Vinatzer, Alex

IPC: G01J01/44 ,  G03B27/73

CPC classification number: G01J1/44

公开(公告)号：EP0077648A3

公开(公告)日：1983-06-08

申请号：EP82305469

申请日：1982-10-14

Applicant: THE BABCOCK & WILCOX COMPANY

Inventor： Youmans, Barry J.

IPC: G01J01/44

CPC classification number: G01J1/44 ,  H03G3/3084

Abstract: A circuit (10) prevents a photo diode (12) from reaching its saturation output voltage, thus ensuring the sensitivity of the photo diode to small changes in radiance at high radiance levels. The circuit (10) utilizes a transistor (30) that is allowed to conduct after the output voltage of the photo diode (12) has reached a predetermined level, thus shunt loading the photo diode and preventing it from reaching its saturation level. A resistor (28) - capacitor (32) time constant circuit is provided to prevent the transistor (30) from conducting until the output voltage of the photo diode (12) has reached a predetermined level for a predetermined period of time, thus preventing premature conduction of the transistor (30) in response to transient or spurious voltages.

公开(公告)号：WO1998023933A1

公开(公告)日：1998-06-04

申请号：PCT/DK1997000534

申请日：1997-11-21

Applicant: DSC COMMUNICATIONS A/S ,  JORGENSEN, Morten

Inventor： DSC COMMUNICATIONS A/S

IPC: G01J01/44

CPC classification number: G01J1/44 ,  H04B10/6911

Abstract: A method of measuring optical power by means of an avalanche photodiode (1) comprises generating an electrical signal in response to and as an indication of the optical power (Pin) incident on the photodiode. When the incident optical power (Pin) is lower than a selected limit value (P1), the electrical signal is determined as a function of a current (Id) generated in the photodiode (1) by the optical power. When the incident optical power exceeds this limit value, the current in the photodiode (1) is limited to a constant value (Imax). The electrical signal is determined when the incident optical power (Pin) exceeds the limit value (P1) so that it comprises a contribution which is a function of the voltage (Vd) across the photodiode. A corresponding optical receiver comprises means for determining the electrical signal in response to a current (Id) in the photodiode, and means (3) for limiting the current in the photodiode (1) to a constant value (Imax) when the incident optical power (Pin) exceeds a selected limit value (P1). Further, the receiver comprises means (10, 11) for determining the electrical signal so that it comprises a contribution which is a function of the voltage (Vd) across the photodiode when the incident optical power (Pin) exceeds the limit value (P1).

Abstract translation: 通过雪崩光电二极管（1）测量光功率的方法包括响应于入射在光电二极管上的光功率（Pin）的指示和产生电信号。 当入射光功率（Pin）低于所选择的限制值（P1）时，电信号被确定为光电二极管（1）中由光功率产生的电流（Id）的函数。 当入射光功率超过该极限值时，光电二极管（1）中的电流被限制为恒定值（Imax）。 当入射光功率（Pin）超过极限值（P1）时，确定电信号，使得它包括作为光电二极管两端的电压（Vd）的函数的贡献。 对应的光接收器包括用于响应于光电二极管中的电流（Id）来确定电信号的装置，以及用于当入射光功率时将光电二极管（1）中的电流限制为恒定值（Imax）的装置（3） （Pin）超过选定的限制值（P1）。 此外，接收机包括用于确定电信号的装置（10,11），使得当入射光功率（Pin）超过限制值（P1）时，它包括作为二极管两端的电压（Vd）的函数的贡献， 。

公开(公告)号：WO1984000063A1

公开(公告)日：1984-01-05

申请号：PCT/US1983000658

申请日：1983-04-29

Applicant: BAXTER TRAVENOL LABORATORIES, INC.

Inventor： BAXTER TRAVENOL LABORATORIES, INC. ,  WICNIENSKI, Michael, F. ,  CHARLES, Donald, E.

IPC: G01J01/44

CPC classification number: G01J1/44 ,  G01J1/429 ,  G01J1/46

Abstract: A temperature independent dosimeter for measuring an amount of irradiation of a predetermined frequency. A photodiode (24) operating in its photovoltaic mode is irradiated with the irradiation to produce a signal that is amplitude-proportional to the amplitude of the irradiation. The signal is converted by a pair of operational amplifiers (89, 96) to a plurality of pulses that are proportional in frequency to the amplitude of the signal. The plurality of pulses is counted by a counter (20) and the irradiation is terminated when the count reaches a predetermined amount.

Abstract translation: 提供了一种独立于温度的剂量计用于测量预定频率的照射量。 用照射来照射在其光伏模式下工作的光电二极管（24），以产生与照射幅度成比例的信号。 信号由一对运算放大器（89,96）转换成与信号幅度成正比的多个脉冲。 多个脉冲由计数器（20）计数，并且当计数达到预定量时照射结束。

公开(公告)号：WO1995021371A1

公开(公告)日：1995-08-10

申请号：PCT/DE1995000150

申请日：1995-02-07

Applicant: REIME, Gerd

IPC: G01J01/44

CPC classification number: H04B1/10

Abstract: A circuit arrangement for a light signal receiver for receiving and recognising light signals which are transmitted in pulses and on which ambient light is superimposed in a parasitic manner with an undefinable intensity contains a two-pole light sensor and a separate current-voltage converter (N1, N2) for direct current for each terminal of the light sensor (1), in which each terminal is connected to an identical signal input of a current-voltage converter (N1, N2) which have the same transmission behaviour, are connected as amplifying filters and are negative feedback connected in d.c. array and frequency-dependently via the input to which the terminal of the light sensor (1) is connected so strongly that the d.c. voltage across the terminals of the light sensor (1) is constant, regardless of the intensity of the parasitic light and the outputs of the current-voltage converter are a.c. connected to an input of a differential amplifier (N3).

Abstract translation: 用于光信号接收器的电路装置，用于接收和检测的光信号，其被发送的脉冲，并且其中环境光叠加寄生与不可定义强度，包括一个两极光传感器和用于将光传感器的每个终端电极（1）包括一个单独的电流 - 电压转换器（N1，N2） 为直流电，其中，用电流 - 电压转换器（N1，N2），它们具有相同的传输特性的相似的信号输入各终端极，可连接为放大滤波器，并通过在该（1）的光传感器的端子极是输入 是DC和频率相关的，从而强烈反对在光传感器的端子极耦接至所述DC电压（1），而不管寄生光的强度是恒定的，并且电流 - 电压转换器的交流耦合到一个差动器的输入输出端 是连接rkers（N3）。

公开(公告)号：WO1991000502A1

公开(公告)日：1991-01-10

申请号：PCT/GB1990001012

申请日：1990-07-02

Applicant: THE SECRETARY OF STATE FOR DEFENCE IN HER ... ,  JOHNSON, Martin ,  JONES, Robin

Inventor： THE SECRETARY OF STATE FOR DEFENCE IN HER ...

IPC: G01J01/44

CPC classification number: G01J1/44 ,  G01J2001/4466 ,  G01S7/4861

Abstract: An avalanche photodiode quenching circuit (20) incorporates an avalanche photodiode (APD) (22) and a first comparator (C1) responsive to reduction in APD voltage. The comparator (C1) is arranged to activate an APD quench circuit (38) in response to APD avalanche initiation. The circuit (20) also includes a second comparator (C2) arranged to reset the first comparator input (N2) in response to a further reduction in APD voltage caused by initiation of quenching. The second comparator (C2) is also connected to a monostable circuit (48) arranged to latch the first comparator output response to resetting. The monostable circuit (48) maintains the first comparator output level constant until the APD (22) has recharged.