{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","uuid":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","normalized_title":"数字化生存20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","isbns":["9787121307362"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":362,"navigation_url":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104","title_url":"https://workshop.closeclaw.top/ai/title/%E6%95%B0%E5%AD%97%E5%8C%96%E7%94%9F%E5%AD%98%2020%E5%91%A8%E5%B9%B4%E7%BA%AA%E5%BF%B5%E7%89%88","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/bbcce9bd-b637-4fa6-8a80-dadabab80104","page_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/page","search_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/search"},"page":{"printed_page":119,"pdf_page":190,"physical_index":190,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"51673de2a40433f5b2f0810388283d29d9b41672ec0a69978463da2b0b702709"},"chapter":"20周年纪念版 数字化生存 一本影响千百万人的互联网启蒙经典著作","content":"在《星球大战》（StarWars）这部影片中，R2D2就用这种方式，把莉亚公主的影像投射在欧比王的地板上。美丽的公主变成了投射在空间中如幽灵般的幻影，从任何角度（原则上说）都能看得见。这种特殊效果，就像《星际旅行》和其他科幻电影中的类似效果一样，无意间造就了一批对全息一类技术麻木淡漠的观众。我们在电影中看过太多类似的镜头，因此误以为这种技术很容易。\n\n事实上，发明白光全息术（whitelight holography，今天这种技术普遍用在信用卡上）的麻省理工学院教授斯蒂芬·本顿（StephenBenton）花了二十多年的时间，借助于价值上百万美元的超级计算机的力量，运用了几乎无价的特殊光学仪器，再加上十几位出众的博士生孜孜不倦的努力，才得到了（与你在电影中所看到的）类似的效果。\n\n全息术(holography)是匈牙利科学家丹尼斯·盖博（DennisGabor)于1948年发明的。用最简单的话来说，全息图像（hologram）就是把一个情境中所有可能的景象聚集在一个光调制模式下的单一平面上。随后，当光束通过这个平面或被这个平面反射的时候，原先的景象会在空间中以光学方式重组，成为立体影像。\n\nPart 2|个性化界面\n\n119","previous_page":118,"next_page":120}