Handy type image scanner

Abstract

Abstract PURPOSE:To uniformize the read image density by detecting the speed of a scanner to an original scanning direction so as to vary the scanning drive timing of a sensor. CONSTITUTION:The original 12 is moved in a speed (v=l/t; l is original relative movement per time t) relatively by the movement of the scanner 1, a roller 5 is turned by an angular velocity in response to the original relative moving speed and an encoder 2 is turned at an angular velocity accordingly. Dark/light slits formed around the encoder 2 are detected by a photodetector 41 and a pulse is generated in the timing in response to the angular velocity of the encoder, that is, the scanning speed of the original. Since the scanning drive timing of the sensor is variable in this way, the image of the original is reproduced with fidelity.

Inventors

• 👤 Shunji Handa
• 👤 伴田　俊二

Bibliographic Details