【摘要】 针对液晶投影器（ＬｉｑｕｉｄＣｒｙｓｔａｌＤｉｓｐｌａｙ）能容易地通过图象板与微机连接，接收ＰＣ机发出的数字电信号并把接收到的信号转换成模拟的光信号投影，可以根据实际应用实时控制投影光栅的周期及相移，提出了基于ＬＣＤ投影的全电子的ＰＭＰ方法。详细讨论了ＬＣＤ在ＰＭＰ中的应用特性，研究了光强传递函数（ＩＴＦ）的非线性、ＬＣＤ投影光场的微结构及投影光场的不均匀性，提出了在ＰＭＰ中对ＩＴＦ的非线性影响作校正投影并辅以适当离焦以得到最佳投影效果的方法更多还原

【Abstract】 LCD can be connected to a PC computer by a frame grabber. It receives the digital signals from the frame memory and converts the signals into analog light signal projecting, so the spatial resolution of the pattern and the phase shifts of the grating can be conveniently adjusted and controlled by the computer. In the paper we presented a precalibrated and defocused projecting method on the basis of discussing the characteristics of LCD in PMP in detail including Intensity Transfer Function(ITF), fine structure of the projecting field and non uniform projecting light field. We have a satisfied experimental inspection result with a commerical color LCD by this projecting method.更多还原