| 摘要 |
A projection system includes a total reflection element, an image reader, an analysis system and a server device. The image reader reads a projective image guided by the optical projection device and the total reflection element and outputs a read signal. The analysis system analyzes the read image by an evaluation function and determines the clearest image on the projective plane so as to output an adjustment signal. The server device automatically performs the focal adjustment to the optical projection device based on the adjustment signal.
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