| 摘要 |
PROBLEM TO BE SOLVED: To stabilize an optical path of laser light to be used in fixing a toner image even when using a belt rotating around an optical system.SOLUTION: A transparent belt 2412 is an endless belt that transmits laser light to be irradiated from a light source 242. An optical system 2411 includes: an incidence surface F1 upon which the laser light passing through one area of the transparent belt 2412 is incident; and an emission surface F2 that emits the incident laser light toward other area of the transparent belt 2412. The optical system 2411 is configured to protrude from an outer peripheral surface of a holding member 2413 on an incidence surface F1 side, and a length of the transparent belt 2412 is adjusted so as to closely adhere to the optical system 2411 in a range where a light flux Lu is incident upon the incidence surface F1 and in a range where the light flux Lu emits from the emission surface F2. Accordingly, the transparent belt 2412 is configured to rotate around the optical system 2411 as contacting with the incidence surface F1 and emission surface F2.SELECTED DRAWING: Figure 2 |
