| 摘要 |
PROBLEM TO BE SOLVED: To make illumination light sufficiently insure light quantity at a position to be read on a surface of original in an ultra-thin typed linear image sensor for color using a rod lens array having a fast reading rate and high resolution. SOLUTION: A light source unit composed of light sources 1 which have high luminance and a line-shaped optical path and are respectively independent about three wavelengths of red, green and blue is housed in the housing 2 also operating as an aperture 3 and a reflector 4. Thus, the light source unit is made to have directivity and light collectivity and linear light of high luminance is efficiently supplied at the position to be read on the surface of the original.
|
