公开(公告)号：US4241992A

公开(公告)日：1980-12-30

申请号：US81972

申请日：1979-10-04

申请人： John R. Flint ,  Heinz Hertel

发明人： John R. Flint ,  Heinz Hertel

IPC分类号： G03B27/32 ,  G03B27/47 ,  G03G16/00 ,  G03B27/52

CPC分类号： G03B27/47

摘要： The present invention is used in photo-recording machines, such as microfiche recorders, which receive a document and record an image of the document on a photo-recording medium such as photoplastic film. The invention inhibits double exposures on frames of the film by use of distinctive indicator marks recorded on the film at preselected locations called indicator mark fields. The presence or absence of an indicator mark in such an indicator mark field signifies, respectively, that its corresponding frame is or is not available for recording a document image.In an improved recorder, prior to a proposed recording, a detector scans the indicator mark field corresponding to the frame selected for recording. If the detector detects an indicator mark, the recorder is inihibited from recording the document in the selected frame. A projection light source forms the image of the indicator mark field and projects it along an optical path in which a sensor of the detector is interposed. Where the indicator mark includes lighter and darker portions, the sensor responds to the intensity variations and may be mounted on motive means and swept thereby across the optical path transversely. The sensor output is automatically evaluated by means which may include or cooperate with a logic circuit responding to an evaluation signal and preventing recording despite a operator-entered record instruction.If no indicator mark is dectected, document recording proceeds in the selected frame, and an indicator mark is simultaneously recorded in the corresponding indicator mark field.

摘要翻译： 本发明用于接收文件并在诸如光致塑料薄膜的光记录介质上记录文档的图像的诸如缩微胶片机的照相记录机。 本发明通过使用称为指示标记字段的预选位置处记录在胶片上的独特的指示标记来抑制胶片的两帧曝光。 在这样的指示标记字段中存在或不存在指示符标记分别表示其对应的帧是或不可用于记录文档图像。 在改进的记录器中，在所提出的记录之前，检测器扫描与被选择用于记录的帧对应的指示符标记字段。 如果检测器检测到指示标记，记录仪将被禁止在所选帧中记录文档。 投影光源形成指示标记场的图像，并沿着其中插入有检测器的传感器的光路投影。 当指示标记包括较浅和较暗部分时，传感器响应于强度变化，并且可以安装在动力装置上，从而跨越光路横向扫掠。 传感器输出通过可以包括或与逻辑电路配合的方式进行自动评估，该逻辑电路响应于评估信号，并且尽管进行了操作者输入的记录指令也阻止了记录。 如果未检测到指示标记，则文档记录在所选帧中进行，并且指示符标记同时记录在相应的指示符标记字段中。