| 单词 | light pen |
| 释义 | > as lemmaslight pen light pen n. a photosensitive device resembling a pen, held to a screen to read and edit displayed information and pass it to a computer (now chiefly historical); (also) a similar device, which additionally emits a beam of light, used to read bar codes. ΘΚΠ society > computing and information technology > hardware > peripherals > [noun] > light-pen light gun1937 light pen1957 1957 Proc. IRE-AIEE-ACM Western Joint Computer Conf. 157/1 (table) Light pen (photoelectric pick-up device). 1964 Discovery Oct. 53/2 (caption) Display console of a computer which illustrates actual graphs, characters and drawings stored within the machine in digital form. The operator can make corrections to the display with a ‘light pen’ which automatically corrects the stored information. 1973 Courier & Advertiser (Dundee) 21 Feb. 7/1 The 280's light pen will ‘read’ information from colour bar coded tags and data from 48 terminals can be fed into a central data unit and recorded on magnetic tape ready for computer processing. 2012 Professional Certificate Marketing, Study Text (Chartered Institute Marketing) v. 100 All panellists need to do is run the scanner or light-pen over the barcode as they unpack their shopping. 2016 Canberra Times 27 Aug. a10 The outcome was this sound sampler edited on an early computer screen with a light pen, really years ahead of its time. < as lemmas |
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