公开(公告)号：US4437738A

公开(公告)日：1984-03-20

申请号：US254748

申请日：1981-04-16

申请人： James E. R. Headley ,  William R. Limburg ,  Robert A. Nordmeyer ,  Jay Smith, III

发明人： James E. R. Headley ,  William R. Limburg ,  Robert A. Nordmeyer ,  Jay Smith, III

IPC分类号： G03B21/11 ,  G03B23/12 ,  G03B21/22

CPC分类号： G03B21/111 ,  G03B21/115

摘要： An optical film reader for projecting and enlarging micro copy information recorded in rollfiche format on rolls of photographic film or the like which provides a film transport mechanism enabling rapid manual scanning of the enclosed rollfiche strip in both directions, with instantaneous reversal of the scanning direction without backlash in the film drive. A low glare, high contrast viewing screen is mounted at 45.degree. to the vertical and placed low at the front of the unit perpendicular to the viewer's line of sight. Movable projection optics are provided for scanning of rollfiche microcopy which is wider than that projectable on a fixed sized screen at one given time at a given magnification ratio; the movable projection optics allow projection of the micro copy data or eye-readable index area of the rollfiche by means of a single scanning lever.

摘要翻译： 一种用于投影和放大以卷筒纸格式记录的照相胶卷等的微复制信息的光学读取器，其提供了一种胶片传送机构，其能够在两个方向上快速手动扫描封闭的卷筒纸条，同时扫描方向瞬时反转而没有 电影中的反弹。 低眩光，高对比度观察屏幕垂直安装在45度，并垂直于观察者的视线放置在单元的前部。 提供了可移动投影光学元件，用于扫描在给定时间以给定的放大倍率比在固定尺寸的屏幕上可投射的卷筒纸显微镜; 可移动的投影光学元件允许借助于单个扫描杆投影卷筒纸的微复制数据或眼睛可读的索引区域。