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21. 发明申请

WO1993024327A1 A METHOD AND AN APPARATUS FOR ILLUMINATING POINTS ON A MEDIUM 审中-公开
标题翻译：一种用于在介质上照射点的方法和装置
公开(公告)号：WO1993024327A1
公开(公告)日：1993-12-09
申请号：PCT/DK1993000180
申请日：1993-05-25
申请人： PURUP PREPRESS A/S , BUUS, Niels
发明人： PURUP PREPRESS A/S
IPC分类号： B41B19/00
CPC分类号： G03F7/7035 , B65H5/062 , B65H5/228 , B65H7/14 , B65H23/24 , B65H2301/4452 , B65H2511/20 , B65H2511/22 , B65H2511/512 , B65H2515/212 , B65H2515/342 , B65H2515/60 , B65H2553/41 , B65H2553/416 , G03F7/2002 , G03F7/2045 , G03F7/70716 , H04N1/036 , H04N1/08 , B65H2220/01 , B65H2220/03 , B65H2220/02
摘要： An apparatus for the illumination of points on a medium comprises a perforated wall which is illuminated by substantially collimated optical energy at a centre wavelength ( lambda ). The optical energy passes through the perforations and illuminates the medium which is arranged at a distance (L) therefrom. The perforations have a cross section such that the optical energy is diffracted, and diverging bundles of rays are created. The medium is located in a region around the transition between the Fresnel region and the Fraunhofer region of the bundles of rays. Points on the surface of the medium are illuminated selectively by a source of light through a large number of illumination channels. Each of these channels comprises an optical lens element for intensifying the optical energy received from the light source, a selectively controlled optical valve permitting or preventing optical energy from propagating through the channel, and a channel outlet which, together with the other elements in the means, defines the size of the point formed by the channel. The channels are controlled individually by the central control unit, which is electrically connected to each of the selectively controlled optical valves for selective control of the energy transmission of each channel.
摘要翻译：用于照射介质上的点的装置包括穿孔壁，其被中心波长（λ）上的基本上准直的光能照射。光能通过穿孔并照射与其距离（L）布置的介质。穿孔具有横截面，使得光能被衍射，并且产生发散的光束。介质位于菲涅尔区域和光束束的弗劳恩霍夫区域之间的过渡区域周围。通过大量照明通道，通过光源选择性地照射介质表面上的点。这些通道中的每一个包括用于增强从光源接收的光能的光学透镜元件，允许或防止光能传播通过通道的选择性控制的光学阀，以及与装置中的其它元件一起的通道出口，定义由通道形成的点的大小。这些通道由中央控制单元单独控制，中央控制单元电连接到每个选择性控制的光阀，用于选择性地控制每个通道的能量传输。

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