Patent ID: 6999211

Claim:
An original conveying apparatus comprising: conveying means for conveying an original to an image reading section of an image forming apparatus; original detecting means comprising a light-emitting section, and a light-receiving section; adjustment means for adjusting a light amount from said light-emitting section; volatile storage means which permits electrical writing and erasure, for storing a correction value of the light amount adjusted by said adjustment means; nonvolatile storage means which permits electrical writing and erasure, for storing the correction value; and writing means for carrying out writing of the correction value only to said volatile storage means and not to said nonvolatile storage means when the correction value has not changed by at least a predetermined amount relative to a correction value before adjustment by said adjustment means, wherein adjustment of the light amount from said light-emitting section by said adjustment means is carried out after a predetermined time period has passed after the original conveying apparatus has moved into a standby mode.