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21:54 Nov 19, 2008
English to Chinese translations [PRO] Science - Physics Additional field(s): Electronics / Elect Eng
English term or phrase:dark current
Definition from Tyco Electronics Corporation: The thermally induced current that exists in a photodiode in the absence of incident optical power.
This voltage may be as low as 10 mV or as high as 50 V and the dark currents may vary from pA to μA depending upon the junction area and the process used. Dark current is always specified at a particular value of reverse applied voltage. optoelectronics.perkinelmer.com
The photodiode noise in is the sum of the thermal noise (or Johnson noise) ij of a resistor which approximates the shunt resistance and the shot noise isD and isL resulting from the dark current and the photocurrent. Hamamatsu Corporation
Dark current is dependent on temperature. While dark current may initially be low, it will increase as the device temperature increases. tpub.com
Definition from Baidu: 暗电流 dark cerrent 也称无照电流 光电耦合器的输出特性是指在一定的发光电流IF下，光敏管所加偏置电压VCE与输出电流IC之间的关系，当IF=0时，发光二极管不发光，此时的光敏晶体管集电极输出电流称为暗电流，一般很小。 此外在生理学方面，是指在无光照时视网膜视杆细胞的外段膜上有相当数量的Na离子通道处于开放状态，故Na离子进入细胞内，形成一个从内段流向外段的电流，称为暗电流（dark current）。 暗电流是指器件在反偏压条件下,没有入射光时产生的反向直流电流.(它包括晶体材料表面缺陷形成的泄漏电流和载流子热扩散形成的本征暗电流.) 所谓暗电流指的是光伏电池在无光照时，由外电压作用下P-N结内流过的单向电流。
Dark current is the constant response exhibited by a receptor of radiation during periods when it is not actively being exposed to light. ... - Wikipedia
Explanation: 暗电流/无照电流 An optional black anodized aluminum cover can be used to eliminate ambient light and to block the light path when taking [dark current] measurements. 另外还提供一个可选配的黑色阳极电镀铝盖用于在进行[暗电流]测试时遮蔽环境光线。
ChristineS China Local time: 03:30 Native speaker of: Chinese
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