单词 | photoelectric register control |
释义 | photoelectric register control [¦fōd·ō·i`lek·trik `rej·ǝ·stǝr kǝn´trōl] CONTROL SYSTEMS A register control using a light source, one or more phototubes, a suitable optical system, an amplifier, and a relay to actuate control equipment when a change occurs in the amount of light reflected from a moving surface due to register marks, dark areas of a design, or surface defects. Also known as photoelectric scanner. |
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