| 摘要 |
A laser picture drawing apparatus comprises a movable stage for supporting a screen having a surface on which a figure is to be drawn, a laser oscillator for emitting a laser beam, a galvanomirror for deflecting the laser beam, a F- theta for focussing the deflected beam a focal point on the surface to be drawn upon, and a mirror disposed movably along an optical axis between the F- theta lens and the surface to be drawn upon, for reflecting the beam from the F- theta lens in a figure-drawing direction. The reflector is moved along the optical axis at a distance equal to the thickness of the screen.
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