Patent ID: 9545788
Date: 2017-01-17
CPC Classifications: B41J,G01P

Claim:
1. A velocity detecting apparatus comprising: a region formation member having a first region and a second region that are arranged cyclically in a particular direction, the first region and the second region having different optical characteristics from each other; an optical sensor configured to emit light to the region formation member and to output a pre-correction pulse signal that is on a first level when facing the first region and that is on a second level when facing the second region, the second level being different from the first level, the optical characteristics of the first region and the second region being such that the optical sensor receives a larger amount of light from the second region than from the first region; a moving device configured to move the optical sensor and the region formation member relative to each other in the particular direction; and a controller configured to control the optical sensor and the moving device, the controller being configured to perform: