| 摘要 |
A projection device, comprising means ( 4 a, 4 b, 5, 6 ) for directing a plurality of light beams ( 3 a, 3 b, 3 c) onto a scanning device ( 13 ), adapted to scan said beams in order to project an image on a surface. The device has an adjustable lens arranged in the optical path of said beams after said scanner so that the scanner is located between the lens and its focal length. Through this arrangement, the adjustable lens will enable a reduction of the angular spread of the projection, without reducing the resolution of the displayed image. This, in turn, enables a projection of an image at a desired distance, while such a size is maintained that the available light intensity is sufficient.
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