Image forming apparatus

摘要

In a case of changing a first light quantity to a second light quantity which is smaller than the first light quantity, a light quantity changing unit changes a light quantity to a third light quantity, which is smaller than the first light quantity and larger than the second light quantity, before changing the light quantity to the second light quantity, and a third light quantity is a light quantity with which the signal is able to be output in a state where a first threshold is set.

主权项

1. An image forming apparatus, comprising:
a light source which emits light to a photosensitive member; a deflection unit which reflects the light emitted from the light source to the photosensitive member to form a latent image; a light receiving unit configured to receive the light which is emitted from the light source and reflected by the deflection unit; a signal output unit which outputs a signal based on a value related to the received light; a light quantity changing unit which changes a light quantity that the light source emits; and a setting unit which sets a threshold for outputting the signal based on the value related to the received light, wherein in a case where the light receiving unit receives light which is emitted from the light source with a first light quantity, the setting unit sets a first threshold based on a value related to a first received light corresponding to the first light quantity, and in a case of changing the first light quantity to a second light quantity which is smaller than the first light quantity, the light quantity changing unit changes the light quantity to a third light quantity, which is smaller than the first light quantity and larger than the second light quantity, before changing the light quantity to the second light quantity, and the third light quantity is a light quantity with which the signal is able to be output in a state where the first threshold is set.