DOUBLE LENS TYPE CONVERGING DEVICE FOR DOUBLE PLANE TYPE FLAT SCANNER

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive device for scanning the colors of both a reflection original document and a transmission original document with a predetermined resolution by providing a driving device for moving a first and/or second optical lens attached to a lens carriage into an optical path including an original image. SOLUTION: An original 103 to be scanned is placed toward an Rx object focal plane by a reflection original document 102 and a transmission original document 124 is placed while making an emulsion surface into Tx object focal plane 210. A scanning carriage 220 is provided with an illumination system 222, optical system 224 and detection system 226. The optical system 224 is provided with a condenser lens 228 for determining an optical path 229 having an optical axis 230 from a scanning line 113 to a sensor focal plane 232 of a linear sensor array 234. The illumination system 222 illuminates the scanning line 113, and the optical system 224 is changed so as to converge the scanning line 113 on the sensor focal plane 232. Thus, the reflection original document 102 and the transmission original document 124 can be mixed by minimum reconstituting operation.