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    BRAKED MEDIA TRANSPORT FOR LASER SCANNERS
    1.
    发明申请
    BRAKED MEDIA TRANSPORT FOR LASER SCANNERS 审中-公开
    用于激光扫描仪的BRAKED媒体传输

    公开(公告)号：WO1985002274A1

    公开(公告)日：1985-05-23

    申请号：PCT/US1984001843

    申请日：1984-11-13

    Applicant: MATRIX INSTRUMENTS INC.

    Inventor： MATRIX INSTRUMENTS INC. ,  BALASUBRAMANIAN, N. ,  HELGESSON, Alan, L.

    IPC: G03B27/32

    CPC classification number: H04N1/1035 ,  H04N1/0473 ,  H04N1/1008 ,  H04N1/1017 ,  H04N1/1048 ,  H04N1/1052 ,  H04N1/1135 ,  H04N2201/02439 ,  H04N2201/0436 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04734 ,  H04N2201/04755 ,  H04N2201/04756 ,  H04N2201/04794

    Abstract: A transport (11) for a laser writing and reading system in which a carriage (15) is propelled by a falling mass, either its own or an auxiliary mass. The falling mass works against a hydraulic cylinder (23) and piston in which hydraulic fluid is displaced from the cylinder. An adjustable valve limits the flow of hydraulic fluid out of the cylinder so that the fall of the mass, and hence the carriage is braked to a uniform velocity. The system also includes a laser (33) having a beam (31) for scanning in a line transverse to the direction of motion of the carriage. A photosensitive medium (18) is disposed to receive the scanning radiation. Either the laser or the photosensitive medium may be mounted on the carriage, with the other mounted in the fixed position in optical communication therewith. A servo system (Fig. 7) receives a signal representing velocity of the carriage and compares it to a first reference signal representing desired carriage velocity. The comparison yields an error signal which is used to adjust the adjustable valve (28) acting as a variable brake for the transport. A second selectable reference signal is provided so that the first reference signal can be bypassed when the carriage is reset at high velocity or is at rest. By controlling the rate of fluid flow through the valve, the mass will fall with uniform velocity, thereby propelling the carriage at a uniform, vibration-free rate.

    Abstract translation: 一种用于激光写入和读取系统的传送器（11），其中托架（15）由落下的质量块或其自身或辅助质量块推动。 液压缸（23）和液压油从液压缸移动的活塞。 可调节阀将液压流体流出气缸，使得质量的下降，因此滑架被制动成均匀的速度。 该系统还包括一个激光器（33），该激光器（33）具有用于沿与滑架运动方向横切的线扫描的光束（31）。 光敏介质（18）设置成接收扫描辐射。 激光或感光介质可以安装在滑架上，另一个安装在固定位置上，与光学通信。 伺服系统（图7）接收表示滑架速度的信号，并将其与表示所需载运速度的第一参考信号进行比较。 该比较产生误差信号，该误差信号用于调节用作运输的可变制动器的可调节阀（28）。 提供第二可选参考信号，使得当滑架以高速度复位或静止时，第一参考信号可以被旁路。 通过控制通过阀的流体流量，质量将以均匀的速度下降，从而以均匀的无振动速率推动滑架。

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