Txoj cai ntawm CCD scanner

Lub CCD scanner siv lub hauv paus ntsiab lus ntawm photoelectric coupling (CCD) los duab cov ntawv luam barcode thiab tom qab ntawd txiav txim siab nws. Nws qhov zoo yog: tsis muaj ncej, tsis muaj lub cev muaj zog, lub neej ntev thiab tus nqi pheej yig.

Thaum xaiv CCD scanner, ob qhov tseem ceeb tshaj plaws yog:

Qhov tob ntawm qhov chaw: Txij li thaum lub hauv paus ntsiab lus ntawm kev kos duab ntawm CCD zoo ib yam li lub koob yees duab, yog tias koj xav kom qhov tob ntawm qhov chaw, koj yuav tsum nce lub lens raws li, kom CCD loj dhau thiab tsis yooj yim rau kev khiav lag luam. CCD zoo heev yuav tsum muaj peev xwm nyeem tau yam tsis tau ua raws li bar code, thiab nws yog nruab nrab ntawm qhov loj me thiab yooj yim rau kev khiav lag luam.

Kev daws teeb meem: Yog tias koj xav nce qhov kev daws teeb meem CCD, koj yuav tsum nce chav tsev ntawm cov duab photosensitive ntawm qhov chaw duab. Tsawg{{0}} tus nqi CCDs feem ntau yog 5 pixels, thiab nws txaus los nyeem cov lej lag luam xws li EAN thiab UPC. Nws yuav nyuaj rau nyeem lwm cov kab ke. Nruab nrab-ntau CCDs feem ntau yog 1024pixels, thiab qee qhov txawm tias ncav cuag 2048pixe1, uas tuaj yeem paub qhov txawv ntawm barcode nrog cov khoom nqaim tshaj plaws ntawm 0.1mm.