| 摘要 |
Apparatus for producing microform records includes an image-reducing projection system positioned above a hard copy and transparency-receiving imaging station defining a horizontal document plane. An opaque platform is located at the document plane for supporting hard copy and a transparent plate is located at or near the document plane for supporting a transparency. Overhead lamps are provided to direct light downwardly upon the hard copy, and a light source, preferably a cathode ray tube, is provided below this document plane to project light upwardly through the document plane. The cathode ray tube or other light source produces a uniform light field or image-containing light field, the former when a transparency is placed at said document plane, the latter either when a transparency is or is not located at or near said document plane. When an image-containing light field is directed through a transparency at the document station, the microform record produced includes both the image in the image-containing light field and the object of the transparency as an overlay of the same.
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