物理学报2016，Vol.65Issue(17)：170701-0-170701-7,8.DOI:10.7498/aps.65.170701
基于长余辉材料的激光书写和显示∗
Writing and displaying by the laser on a long lag phosphor material
摘要
Abstract
We make a machine that can perform as an invisible hand able to write and draw smoothly accompanied with the incidental music. And this machine can be used in the commercial advertising display, artmobile poster writing, the accessory equipment of the multimedium classrooms, stage effect, new art pattern especially in dark. We present a new display application of the long lag phosphor (LLP) material in this paper. A prototype is fabricated which can be written, drawn and displayed by controlling a laser beam on the screen which is made from the LLP material. For selecting the match laser beam wavelength for different LLP material screens, the energy band structure of the LLP material Mn(H2PO4)2 of 3–4 eV band gap is calculated by VASP (Vienna abinitio simulation package) software and its Raman shift peaks of Mn(H2PO4)2 are tested at 625 nm, 769 nm, 1049 nm and in far infrared wavelength range. The intensity of powdery LLP SrAl2O4:Eu2+, Dy3+, which is tested by the instrument of UWLA(ultra-weak luminescence analyzer), can decay from 43479 to 9570 electronic counts in 5 min, and then descend slowly. The intensity decay of coated film LLP Mn(H2PO4)2, which is tested by the instrument of HANDYSCOPE HS3, can decay quickly at the beginning and then slowly after 400 s. These intensity decay results can explain that LLP materials of SrAl2O4:Eu2+, Dy3+ and Mn (H2PO4)2 are suitable for displaying the image by our prototype. A prototype is successfully made by our group for writing English and Chinese words and drawing picture. Arduino Board is used to control two step motors, and X mirror and Y mirror are rotated to reflect the laser beam. An excitation dot is formed on the surface of LLP display screen. By drawing vectorgragh with Coreldraw and convert it into “.nc”file, the computer runs G-code in CNC (computer numerical control) automatically. Arduino controlled mirror rotation drives the laser beam. The trace of the laser dot is left on the screen and becomes article or graphs in afterglow. The whole device can be energy saving, eyes comfortable, low cost and easy to pick up.关键词
长余辉材料/书写/绘图/激光束Key words
long lag phosphor material/writing/drawing/laser beam引用本文复制引用
梅屹峰,唐远河,梅小宁,刘汉臣,刘骞,余洋,李宁远,高恒..基于长余辉材料的激光书写和显示∗[J].物理学报,2016,65(17):170701-0-170701-7,8.基金项目
国家自然科学基金(批准号:11304245)、陕西自然科学基金(批准号:2016JM1011)和西安理工大学特色项目(批准号:2015TS012)资助的课题 （批准号:11304245）
