| 摘要 |
PURPOSE:To prevent the attenuation of reflected light and to keep the reading speed in the excellent way, by making incident the reflected light from a body to be scanned directly or through reflecting to a projective lens to receive the light at the photodetector. CONSTITUTION:Light is irradiated on an original 21 as a body to be scanned with a pair of light source lamps 22. On a reflected optical path 23 of the irradiated light, a projective lens 24, a trimming filter 25, and a photodetector 26 are provided. Reflection mirrors 27, 28 are located in parallel to the center axis 29 of the path 23. The light reflected along with the axis 29 passes through the lens 24 directly and is made incident to a red photodetector 26b via a red filter 25b. The reflected light toward (a) direction is reflected at the reflection mirror 27 and is made incident to a green photodetector 26c via the lens 24 and a green filter 25c. Similarly, the reflected light toward the (b) direction, is made incident to a red photodetector 26a for color resolution. Thus, a dichroic plane and a prism can be saved to prevent attenuation of the reflected light. |
