| 摘要 |
<p>PURPOSE:To obtain a sharp and clear composite picture, by providing a CCD unit on the image forming surface side of a lens of a scanning optical system, shunting it when it is not used, and converting a picture to an electric signal. CONSTITUTION:Liquid crystal cells 9-11 having dot patterns 12-14 are placed just in front of the projection surface to a photosensitive body 8 by a lens 5. Between the lens 5 and the liquid crystal cell, a CCD unit 17 consisting of a correcting lens 15 and a CCD16 is provided, and a picture used for a composite picture is converted to an electric signal and is stored in an internal memory. With respect to this picture, voltage is selectively applied to the dot of the liquid crystal cells 9-11, an optional shadow by the dot is made on the photosensitive body 8, and the composite picture is formed by said picture and a projected picture by the lens 5. Therefore, a sharp and clear composite picture is obtained, and also the constitution can be simplified remarkably.</p> |
