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    • 1. 发明授权
    • Method and apparatus for ascertaining the positions of film frames
    • 确定胶片框架位置的方法和装置
    • US4167678A
    • 1979-09-11
    • US877827
    • 1978-02-08
    • Klaus MischoRudolf Paulus
    • Klaus MischoRudolf Paulus
    • G03B27/80G03B27/62G01N21/30
    • G03B27/6285
    • Film frames of each of a series of spliced-together exposed and developed photographic films are monitored by photoelectric detector means to ascertain the positions of their leading and trailing edges prior to identification of the frames by a punching device ahead of the copying station. Those film frames whose leading and/or trailing edges cannot be detected with a requisite degree of accuracy (e.g., due to overexposure or underexposure) are pinpointed by ascertaining their length on the basis of accurately ascertained length of other film frame or frames in the same film (a) by calculating the position of the trailing edge upon accurate determination of the leading edge (or vice versa), (b) by calculating the positions of both edges on the basis of the distance between two accurately pinpointed frames which flank the frame whose edges are not detectable, (c) by measuring back from a previously pinpointed frame, or (d) by measuring forwardly from a subsequently ascertained frame.
    • 通过光电检测器装置监视一系列拼接在一起的曝光和显影的照相胶片中的每一个的胶片框,以便在通过复印台之前的冲孔装置识别框架之前确定其前缘和后缘的位置。 通过根据其相同的其他胶片框架或框架的精确确定的长度确定其长度,可以精确确定其前缘和/或后缘以必需的精度(例如,由于过度曝光或曝光不足)而被检测到的胶片帧 通过在准确确定前缘(或反之亦然)时计算后缘的位置,(b)通过基于在框架侧面的两个精确定位的框架之间的距离来计算两个边缘的位置, 其边缘不可检测,(c)通过从先前精确定位的框架测量回来,或(d)通过从随后确定的框架向前测量。
    • 5. 发明授权
    • Microfilm recording apparatus
    • 微胶卷记录装置
    • US4056319A
    • 1977-11-01
    • US617446
    • 1975-09-29
    • Klaus Mischo
    • Klaus Mischo
    • G03B27/50G03B27/80G03B27/74G03B27/78
    • G03B27/80G03B27/50
    • The originals to be photographed are transported past a measuring station and an aperture at a filming station. The microfilm is transported past a film aperture at the filming station. The originals vary in length (measured in the direction of transport) from a maximum to a minimum length. The measuring station is spaced a distance from the filming station which corresponds to the maximum length. Each original is scanned in a direction perpendicular to the direction of transport at the measuring station and the peak amount of light reflected from the original is stored. The number of storage units is equal to the number of originals of smallest length which can be accommodated in the distance between the filming and measuring stations. For each storage unit, a monostable multivibrator is furnished which is started when the corresponding original leaves the measuring station and whose time constant is such that its trailing edge occurs just prior to the time the same original reaches the filming station. A step switch controlled by the trailing edges of the multivibrators connects the output of each storage unit in turn to the input of a differential amplifier whose output in turn controls the position of a filter or diaphragm controlling the light falling on the original at the filming station.
    • 要拍摄的原稿通过测光站和拍摄台的光圈传送。 微缩胶卷经过拍摄台的胶片孔径传送。 原件长度(从运输方向测量)从最大长度变化到最小长度。 测距站与拍摄台间隔一段距离,对应于最大长度。 每个原稿在与测量站的传送方向垂直的方向上进行扫描,并存储从原稿反射的光的峰值。 存储单元的数量等于可以容纳在拍摄和测量站之间的距离中的最小长度的原稿的数量。 对于每个存储单元,设置单稳态多谐振荡器,当对应的原稿离开测量站并且其时间常数使得其下降沿恰好在相同的原稿到达拍摄台之前发生时启动。 由多谐振荡器的后沿控制的阶梯开关将每个存储单元的输出依次连接到差分放大器的输入端,差分放大器的输出依次控制滤光片或光圈控制在拍摄台上落在原稿上的光线的位置 。