They called it " Agridrone." It uses a special " optical sensor" to examine crops.

他们称它为“农业无人机”，这种无人机使用特殊的光学感应器来检测作物。

Imagine one day a tiny device with an optical sensor will send you an alert if your heart rate is too low.

海伦娜：想象有一天，如果您的心率过低，带有光学传感器的微型设备会向您发送警报。

In the first, we explored the optical sensor and how computer mice take images of the surface  and calculate X and Y movement.

首先，我们探索了光学传感器以及计算机鼠标如何拍摄表面图像并计算 X 和 Y 运动。

The company cognates offer an infrared and an optical sensor along with a camera that not only screens body temperatures, but also detects whether someone is wearing a mask or keeping social distance.

该公司同源产品提供红外和光学传感器以及摄像头，不仅可以检测体温，还可以检测某人是否戴着口罩或保持社交距离。

Because smartphones already have nearly all the hardware needed for this method-- you could potentially ditch the case altogether and just add a thin-film force sensor atop the phone's existing optical sensor.

因为智能手机几乎已经具备了这种方法所需的所有硬件——你可能会完全放弃外壳，只需在手机现有的光学传感器上添加一个薄膜力传感器。

We won't get into too much detail as to how it works, but by emitting green light, the watch's optical PPG sensor tracks blood circulation of your wrist, which outputs data to measure a little thing called your heart rate.

我们不会详细介绍它是如何工作的，但是通过发出绿光，手表的光学 PPG 传感器跟踪你手腕的血液循环，输出数据来测量一个叫做心率的数据。