| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved low-cost spectrophotometer suitable for online color printing color control system. SOLUTION: An image forming chip 14 usually forms only a part of a document image forming bar having three rows and three colors used for a scanner, and has at least three different color filters having three rows. A plurality of photo-site chips D12C, D12D, and D12E are corrected to provide a photo-site D12F having no filter. The spectrophotometer has a considerably decreased number of different LEDs or other spectral illumination sources. One of the LEDs and the illumination sources may be white light. The spectrophotometer transmits a large number of spectral data outputs from photo-sites having different filters which are simultaneously illuminated with reflected light from color testing target areas which are sequentially illuminated with the restricted number of LEDs, provides information on broad-band spectra, and enables color control. |
