| 摘要 |
PURPOSE:To improve precision of input of an inspecting sensor by a method wherein sequence control which shifts to preparation for reading a second density from a point of time when no noise could be conformed in the case where detection moves from a first density to the second density, is performed. CONSTITUTION:A control system is composed of an image processing part A, a print sequence control part B, a laser diode unit part C, a high voltage power source supply part D, both detecting sensors 14, 15 of a photosensitive material peripheral part, etc. After end reading surface density (first density) of a photosensitive material part with an image density detecting sensor 14, the read input voltage is successively checked. If this input voltage is taken as a critical value between the first density and second density, when a counter, Ct is '2', whether the input voltage is the second density or noise is checked from respective count values of the counter Cf to be incremented at time of the first density and of the counter Ct to be incremented at time of the second density. Consequently, a read error of an image pattern part can be removed, and high precise optical beam light quantity correction can be accurately performed. |
