In addition, it is because collimated laser beam is free of focusing problem that output image can be projected to curve surface.

另外由于准直的激光束不存在聚焦问题，输出的图像能够准确投影到曲面上。

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Dynamic modulation of laser and laser bean, and offset to target reflection coefficient: laser bean is shaped and collimated to round and slender beam by using of the semiconductor laser.

激光器件及激光束的动态调制，目标反射系数补偿：采用半导体激光器，经过整形、准直成圆细光束。

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