Then the light Pen control of TV tracking window, including the principles of light pen structure, positioning, circuit structure and operation principle of tracking window position controled by light pen and some cautions in the use of light pen are described.
然后叙述数字式电视跟踪窗的光笔控制,其中包括光笔的结构和定位原理,光笔控制跟踪窗位置的电路结构及工作原理,使用光笔中要注意的问题。
Accurate position information is obtained independent of the light spot intensity profile, symmetry or size.
获得精确的位置信息的同时不依赖于光斑强度、形状 、 对称性或尺寸.
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