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1.发明授权Resonant galvanometer scanner system employing precision linear pixel generation 失效共振电流计扫描仪系统采用精密线性像素生成
公开(公告)号：US4482902A
公开(公告)日：1984-11-13
申请号：US413148
申请日：1982-08-30
IPC分类号： G01D9/42
CPC分类号： G01D9/42
摘要： A high resolution scanning system, employing non-linearly driven galvanometer deflection optics, compensates for both the non-linear rate of travel of the information pixel beam and for pixel position offset introduced by an optical subsystem (a flat field lens) that equalize pixel size and quality across the recording medium. The system employs a single high speed reference clock the output pulses of which are counted and used to address a compensation data-containing PROM (programmable read only memory). The contents of successive addresses of the PROM contain pixel location codes identifying the position on the recording medium where a pixel of interest is to be recorded. These codes are derived in accordance with the periodic non-linear rate of travel of the scanning optics across the recording medium and the measured parameters of a flat field lens disposed in the path of the scanning beam. For a sinusoidal scan, the successive PROM addresses contain pixel location defining codes that are effectively compensate for the non-linearity of the sinusoidal scan rate of the galvanometer deflection drive and the image position offset introduced by the flat field lens optical subsystem. Because of this complementary action, the spacing between pixels can be made constant along a recorded line of pixel data.
摘要翻译： 使用非线性驱动的电流计偏转光学器件的高分辨率扫描系统补偿信息像素束的非线性行进速率和用于平衡像素尺寸的光学子系统（平坦场透镜）引入的像素位置偏移 和质量跨越记录介质。 该系统采用单个高速参考时钟，其输出脉冲被计数并用于寻址包含补偿数据的PROM（可编程只读存储器）。 PROM的连续地址的内容包含识别要记录感兴趣像素的记录介质上的位置的像素位置代码。 这些代码根据扫描光学器件跨越记录介质的周期性非线性行进速率和设置在扫描光束路径中的平坦场透镜的测量参数导出。 对于正弦扫描，连续的PROM地址包含像素位置定义代码，其有效地补偿了电流计偏转驱动器的正弦扫描速率的非线性和由平面场透镜光学子系统引入的图像位置偏移。 由于这种互补作用，像素数据之间的间距可以沿记录的像素数据线变得不变。
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公开(公告)号：US4499435A
公开(公告)日：1985-02-12
申请号：US428980
申请日：1982-09-30
CPC分类号： H03B23/00 , H03B2200/0092
摘要： Non-linearities in the sweep output of a voltage controlled oscillator are automatically linearized by a scheme that compensates for changes in slope of the variation in frequency with time during a high accuracy calibration mode, prior to placing the VCO into real time operation. During the calibration mode the sweep rate of the VCO is slowed down as the operational frequency range of interest is divided into a prescribed number of subfrequency segments or windows. During each window, an input control code, obtained from a random access memory (RAM) and representative of the intended slope of the VCO frequency sweep (for that window of interest), is applied to a digital-to-analog converter (DAC) whose output is integrated and applied to the voltage control input of the VCO. Since the output of the DAC is integrated, the frequency variation control signal to be applied to the VCO is a slope change control signal, which is incrementally adjusted, as required, during successive sweeps of the VCO, so as to produce a precompensated control voltage that will cause the rate of change of the VCO frequency output to track an intended ramp (linear with time) or other chosen frequency variation output.
摘要翻译： 在将VCO置于实时操作之前，通过在高精度校准模式下补偿频率随时间变化的斜率的变化的方案自动线性化压控振荡器的扫描输出中的非线性。 在校准模式期间，由于感兴趣的工作频率范围被划分为规定数量的子频率段或窗口，所以VCO的扫描速率变慢。 在每个窗口期间，将从随机存取存储器（RAM）获得并代表VCO频率扫描（对于该感兴趣的窗口）的预期斜率的输入控制代码施加到数模转换器（DAC） 其输出集成并应用于VCO的电压控制输入。 由于DAC的输出被积分，所以施加到VCO的频率变化控制信号是在VCO的连续扫描期间根据需要逐渐调整的斜率变化控制信号，以便产生预补偿的控制电压 这将导致VCO频率输出的变化率跟踪预期的斜坡（线性随时间）或其他选定的频率变化输出。
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公开(公告)号：US4702698A
公开(公告)日：1987-10-27
申请号：US652875
申请日：1984-09-21
CPC分类号： G09B9/40
摘要： A radar return image for display on a cockpit CRT is generated by selectively accessing terrain data compressed and stored in a digital map data base and processing that data to artificially simulate a radar return image pattern on a cockpit display which effectively corresponds that which would otherwise be provided by conventional T/R equipment. Since the compressed data base contains information representative of both the elevation and cultural features of the terrain at map locations that are capable of being intercepted by the aircraft's radar beam, this data may be subjected to signal processing functions to establish pixel intensity control signals by way of which a radar image of a cockpit CRT display is generated. This signal processing and control system includes system functional components for establishing the simulation of the effect of a radar beam having a prescribed beam width, slant-angle, and field of scan and controllably accessing the stored terrain map data from memory for establishing a pixel display data base in accordance with which the pixels of the cockpit radar display are intensity-modulated.
摘要翻译： 通过选择性地访问压缩并存储在数字地图数据库中的地形数据来生成用于在驾驶舱CRT上显示的雷达返回图像，并且处理该数据以人为地模拟驾驶舱显示器上的雷达返回图像模式，这将有效地对应于否则将 由传统的T / R设备提供。 由于压缩数据库包含代表能够被飞机的雷达波束拦截的地图位置的地形的高程和文化特征的信息，所以该数据可以经受信号处理功能以通过方式建立像素强度控制信号 其中产生驾驶舱CRT显示器的雷达图像。 该信号处理和控制系统包括用于建立具有规定的波束宽度，倾斜角度和扫描场的雷达波束的效果的模拟的系统功能部件，并且可控地从存储器访问存储的地形图数据，以建立像素显示 数据库，根据该数据库，驾驶舱雷达显示器的像素被强度调制。
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