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    • 2. 发明授权
    • True zoom capability on a spot scanning electronic printer
    • 现场扫描电子打印机的真实变焦功能
    • US5526255A
    • 1996-06-11
    • US299056
    • 1994-08-31
    • Edwin K. Shenk
    • Edwin K. Shenk
    • B41J2/51B41J2/44B41J2/45B41J2/455G06K15/12H04N1/04H04N1/393G06F19/00
    • G06K15/1223H04N1/3935
    • A method and apparatus for producing a zoom system within a printer is disclosed where the zoom system is adapted to selectively enlarge or reduce an original image such that the enlarged or reduced image can be printed onto a recording medium. Further, the zoom system is adapted to selectively adjust an aspect ratio of the original image. The zoom system utilizes a phase lock loop to produce a pixel clock in a fast scan direction and a governing motor control to alter incremental movement of the recording medium in the slow scan direction, thus, individual pixel size can be manipulated by varying a frequency of the pixel clock to alter a width of the pixel projected onto the recording medium and by governing overlap of successive print lines, and repeating print lines if necessary, to alter a length of the pixel.
    • 公开了一种用于在打印机内生产变焦系统的方法和装置,其中变焦系统适于选择性地放大或缩小原始图像,使得放大或缩小的图像可以被打印到记录介质上。 此外,变焦系统适于选择性地调整原始图像的纵横比。 缩放系统利用锁相环产生快速扫描方向的像素时钟和控制电机控制,以改变记录介质在慢扫描方向上的增量移动,从而可以通过改变单个像素尺寸的频率 像素时钟来改变投影到记录介质上的像素的宽度,并且通过控制连续打印行的重叠,并且如果需要重复打印行,以改变像素的长度。
    • 4. 再颁专利
    • Autofocus movie camera having pulsed terminal drive means
    • 具有脉冲端子驱动装置的自动对焦电影摄像机
    • USRE31362E
    • 1983-08-30
    • US366813
    • 1982-04-08
    • Edwin K. Shenk
    • Edwin K. Shenk
    • G02B7/40
    • G02B7/40
    • The operational range of an adjustable focus lens is subdivided into a plurality of focus zones, of finite size, by a lens control system that produces a plurality of discrete signals representative of said focus zones, said control system utilizing bidirectional drive means to position the movable element of said lens to one of said focus zones from any position within said operational range in order to focus an image of a remote object at an image plane. The present invention optimally increases the focusing speed and the focusing repeatability of said control system while equalizing and minimizing the focusing error introduced into said control system resulting from the use of such focus zones with bidirectional drive means, by anticipating the arrival of said movable lens element at the desired focus zone, disabling the lens drive means for a limited period of time prior to the time that said lens element arrives at said desired focus zone, and then having said drive means provide a pulsating driving force to said movable lens element until said movable lens element reaches said desired focus zone.
    • 7. 发明授权
    • Strobe camera having range correlated scanning blade endoding
    • 频闪相机具有范围相关的扫描刀片编码
    • US4317624A
    • 1982-03-02
    • US203125
    • 1980-11-03
    • Edwin K. Shenk
    • Edwin K. Shenk
    • G03B7/16G03B15/03
    • G03B7/16
    • A flash camera having a range finder, a blade position sensor for producing an output representative of the position of the displaceable blades of a scanning shutter, a flash firing apparatus that includes a position/distance converter responsive to the output of the range finder for producing a representation of the desired flash-fire position of the blades, and a coincidence detector responsive to the output of the blade position sensor for firing the flash unit when the blades reach the position at which the exposure aperture established by the blades will effect proper flash exposure of the subject. In one embodiment of the invention, the converter is in the form of a digital memory whose addresses represent subject distances and whose contents at a given address represents the fire-flash position for the distance specified by the given address. In a second embodiment of the invention, the fire-flash position is generated from a scaled clock.
    • 具有测距仪的闪光照相机,用于产生表示扫描快门的可移动叶片的位置的输出的叶片位置传感器,包括响应于测距仪的输出的位置/距离转换器的闪光发射装置,用于产生 所述刀片的所需闪光位置的表示,以及当所述刀片达到由所述刀片所建立的所述曝光孔径到达适当闪光的位置时,响应于所述刀片位置传感器的输出以点燃所述闪光单元的符合检测器 受试者的曝光。 在本发明的一个实施例中,转换器是数字存储器的形式,其地址表示被摄体距离,并且其给定地址处的内容表示由给定地址指定的距离的防火闪光位置。 在本发明的第二实施例中,从缩放的时钟产生防火闪光位置。
    • 9. 发明授权
    • Automatic focusing camera
    • 自动对焦相机
    • US4199244A
    • 1980-04-22
    • US916114
    • 1978-06-16
    • Edwin K. Shenk
    • Edwin K. Shenk
    • G02B7/40G03B3/00
    • G02B7/40
    • A focusing mechanism for a camera includes a drive arrangement for displacing the camera lens in accordance with the contents of a counter into which the output of a pulse generator is gated during a range pulse whose duration is directly related to the distance of a subject from the camera. The pulse generator is programmed so that its pulse repetition rate matches the time-derivative of the function relating the subject distance to the lens position at which a subject is in focus. Integration of the generator output is carried out by gating the generator pulses into a counter during the range pulse such that at the trailing edge of the range pulse, the contents of the counter will be the integral of the time-derivative evaluated between the limits of the range pulse, i.e., a definite integral representative of the lens position at which a subject will be in focus when located at a distance defined by the duration of the range pulse. For fully automated operation as applied to a still camera, shutter actuation can be in response to arrival of the lens to the position at which the subject is in focus. Applied to movie cameras, the lens can track a moving subject maintaning it in focus during filming.
    • 用于照相机的聚焦机构包括驱动装置,用于根据计时器的内容来移动相机镜头,计数器的内容在其持续时间与被摄体距离的距离直接相关的范围脉冲期间被门控脉冲发生器的输出 相机。 脉冲发生器被编程为使得其脉冲重复率与被摄体距离对准被摄体对焦的镜头位置的功能的时间导数相匹配。 发生器输出的积分是通过在范围脉冲期间将发生器脉冲门控到计数器中进行的,使得在范围脉冲的后沿,计数器的内容将是在时间导数之间的积分 范围脉冲,即当定位在距离脉冲的持续时间所限定的距离时,被摄体将被聚焦的透镜位置的一个有限积分。 对于应用于静态照相机的全自动操作,快门启动可以响应于镜头到达被摄体对焦的位置。 适用于电影摄像机,镜头可以在拍摄过程中跟踪移动的被摄体对焦。