但是目前国内广泛使用的X射线机的点片曝光装置还存在自动化程度低、控制精度差、曝光精度低以及体积大等缺点。
However, the film exposure device of the currently widespread-used X-ray machine has poor quality of image, a low level of automation, poor precision controlled and film exposure and large size.
该方法采用逐个图形曝光的方式使其具有内在的并行特性，可大大提高灰度掩模的制作速度和精度，并降低生产成本。
This system has intrinsic parallel characteristic owing to its stepper exposure mode, therefore it can improve the manufacturing speed and precision of gray-scale masks with low cost.
进而以给定的APS星敏感器参数为基础，研究了计算窗口、曝光时间等精度影响因素的选择方法；
Then choice of the calculation window and the exposure time influencing the dynamic accuracy is analyzed based on given APS star sensor parameters.
应用推荐