The light sensor detects ambient light and switches the monitor into sleep mode after hours, turning off the display but leaving the camera on.

光学传感器能侦察周围光线并在数小时后将控制器转换为待机模式，还能关掉显示屏，但摄像机仍在工作。

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A sensor channels the light signal along an optical fibre.

传感器沿光导纤维输送光信号。

《牛津词典》

By calculating the path between the lens and the sensor, the precise direction of a light ray can be reconstructed.

通过计算镜头和传感器之间的路径，可以重建一个具有精确方向的光线。

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So to be clear, we expect most students to very comfortably pursue the standard edition of the P set, but for this particular P set, and we have about 150 or so of these out on the hallway, and we'll have them at office hours throughout the coming week--this is a little logic board ; with lots of sensors; the sound sensor, a light sensor, a little joystick and the like.

我希望我们大多数同学,研究问题集的标准版本，可编程版有个特殊的问题集，我们会在接下来的几周里，在办公时间为大家做解答,这是个小的逻辑板,上面有很多传感器;,包括声音传感器，光传感器，小操作杆等。

哈佛公开课 - 计算机科学课程节选

Dorset Council contractor SSE Contracting is now changing the light sensor on each light to a timed version in the town's quiet roads.

BBC: Swanage street lights switch-off to save ?150,000 a year

When nearly 30 years ago Dr. Jacob Fraden invented an ear thermometer working on this second principle, the infrared light sensor was so large that he needed a narrow gold-plated reflective tube to channel the light from the ear drum to the sensor.

FORBES: Body temperature.

The ambient light sensor adjusts the display brightness according to the external lighting, so customers always have an excellent viewing experience.

ENGADGET: Gateway trots out bargain-minded 15.6-inch MD Series notebooks