The Sensor Bar contains an array of sensors across the full width of the scanning head.

传感条包含了一组传感器阵列，跨越扫描头的整个宽度。

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Operating principle, characteristics and technical key of photoelectric scanning head are described.

论述了光电扫描头的工作原理，性能特征以及设计中的技术关键。

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Ingenia's machines use a scanning head consisting of three small lasers and six detectors to examine part of an object.

Ingenia公司的机器采用一个扫描头对物体的局部进行检测，该扫描头是由三个小激光器和六个探测器组成。

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Now they have something that works like a flatbed document scanner, with a scanning head containing either six or 12 light-emitting diodes, each emitting light of a specific wavelength between 350 nanometres (ultraviolet) and 800 nanometres (infra-red).

ECONOMIST: Monitor

Patients with subretinal light sensitive implants, however, perceive the shapes of objects naturally from the first day of implantation onwards without reorganisation of the spatial assignments of electrodes by an image processor and without scanning movements of the head.

FORBES: Second Test Of Retinal Implant Shows Restored Vision To The Blind

More than that, I like scanning the frame in great sweeps and even sometimes turning my head to follow the action.

WSJ: A Front-Row Seat at the Movies