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1. 发明授权

US3890043A Enlarging apparatus for use in a bright room 失效
标题翻译：在明亮的房间里使用放大装置
公开(公告)号：US3890043A
公开(公告)日：1975-06-17
申请号：US39905173
申请日：1973-09-20
申请人： DURST AG
发明人： PRAMSTRALLER WILMUTH
IPC分类号： G03B27/32 , G03B27/52
CPC分类号： G03B27/326
摘要： An enlarging apparatus for use in a lighted room has a lighttight housing containing all of its components including a light source and a removable transparency holder. The picture to be copied is projected on a projection surface mounted in an opening in the wall of the housing opposite the light source. A swinging mirror is interposed between the projection surface and an imageviewing window screen in the front wall of the housing which also includes the controls. One of the controls adjusts the focusing and focal distance of the variable projection optics from the projection plane and image-viewing window screen. The window screen has several sets of markings, which help determine the size and format of the projected image as it is focused on the window screen. After focusing, the swinging mirror is swung outwardly away from the path of the projected light rays against the image viewing window screen to seal it off. The opening in front of the projection surface is also sealed by cover which is oppositely hinged from the swinging mirror to prevent exposure of the photographic paper until the swinging mirror has completely covered the image-viewing window screen. The cover is moved back in front of the photographic paper to seal it off from extraneous light before the swinging mirror can return to its inclined position. The photographic paper is contained within a magazine in either roll or sheet form.
摘要翻译：在照明室中使用的放大装置具有容纳其所有部件的不透光外壳，包括光源和可移除的透明度支架。要复制的图像被投影在安装在与光源相对的壳体的壁中的开口中的投影表面上。摆动反射镜插入在壳体的前壁中的投影表面和图像浏览窗口屏幕之间，其还包括控件。其中一个控件调整可变投影光学器件从投影平面和图像浏览窗口屏幕的聚焦和焦距。窗口屏幕有几组标记，这有助于确定投影图像的大小和格式，因为它集中在窗口屏幕上。在聚焦之后，摆动镜从投影光线的路径向外摆动离开图像观察窗屏幕以将其封闭。突起表面前面的开口也被与摆动镜相反铰接的盖密封，以防止相纸的曝光，直到摆动镜完全覆盖图像观看窗帘。在相机的前面将盖子移回到外面的光线上，以便在摆动镜子能够返回到其倾斜位置之前将其封闭。照相纸以卷或片形式包含在一个杂志内。

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