Image forming apparatus that has fixing device having light a belt that is wound around a curved surface of a lens

摘要

Provided is a fixing device including an endless belt that rotates around an axis, and transmits light, a lens that includes a curved surface having a top portion closest to an inner peripheral surface of the belt formed at one end when viewed in the axial direction, and concentrates light incident on the curved surface on a fixed object, and a light source that allows the light concentrated on the fixed object to be incident on a portion of the belt, which is different from a portion facing the top portion and has an amplitude smaller than an amplitude of the portion facing the top portion.

主权项

1. A fixing device comprising:
an endless belt that rotates around an axis, and transmits light; a lens that includes a curved surface having a top portion closest to an inner peripheral surface of the belt formed at one end when viewed in the axial direction, and concentrates light incident on the curved surface on a fixed object; and a light source that allows the light concentrated on the fixed object to be incident on a first portion of the belt, which is different from a second portion of the belt facing a center of the top portion of the lens, the first portion of the belt having a first amplitude of vibration that is greater than a second amplitude of vibration of the second portion of the belt, wherein the belt is wound around a portion of the curved surface on the downstream side of the top portion in the rotation direction.