2023年12月23日 · 线性动态范围 (LDR)是 光电探测器 中一个比较重要的概念，然而很少有教材给出其定义，导致文献中出现极其混乱的局面，可以说为了拉升指标，不择手段。 LDR关心的是探测器对入射光功率在多大范围内能够给出线性的响应， 关心的是光功率的范围。 下图给出了LDR示意图。 LDR示意图。 图中用DR表示。 对于如图所示的探测器，能够分辨出的最小信号是NEP，能够给出线性响应的最大功率是 P_ {\rm sat} ,因此LDR应该为 [NEP, P_ {\rm sat} ]。 工程学上 …

The LDR 10mm (Light Dependant Resistor) is a variable resistor type electronic component, ie it is a resistor whose resistance varies according to the intensity of the light it receives and can be used as a light sensor.

光敏电阻（photoresistor orlight-dependent resistor，后者缩写为LDR）是一种基于内光电效应的半导体元件，它的阻值依赖于入射光强的变化。 入射光强增加，光敏电阻的阻值减小，入射光减弱，光敏电阻阻值增大。

The 10mm LDR Photo Resistor is a light-dependent resistor that changes resistance based on light intensity, ideal for light-sensing and automation projects.

A photoresistor is a resistance made of a semiconductor material whose conductivity changes with the change of illuminance. This feature is used to make photoresistors of different shapes and light-receiving areas. Photoresistors are widely …

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2023年11月19日 · 光敏传感器，通常为光敏电阻（ldr）或光敏二极管，能够根据环境光线强度改变自身的阻值或电流。当光线强度增加时，传感器的电阻或电流会降低，反之则增大。

These small 10mm LDR (Light Dependent Resistor) are also called a photoresistor. An LDR is a resistor whose resistance changes with the amount of light striking it. Key Features of Light Depentent Resistor: As the strength of the light falling on the LDR increases, the resistance of the LDR gets lower.

Light-dependent resistors or photoresistors are a staple of electronics. If you need a way to sense the level of ambient light then there is no easier way to do it. As the light on the sensor increases then the resistance across the two leads decreases.

It is not uncommon for the values of resistance of an LDR or photoresistor to be several Megaohms in darkness and then to fall to a few hundred ohms in bright light. With such a wide variation in resistance, LDRs are easy to use and there are many LDR circuits available. Here the LDR and R1 form a simple ‘Potential Divider’ circuit.