| 摘要 |
PROBLEM TO BE SOLVED: To provide an assembling method for a light beam scanner which can have imaging lenses stacked in two stages by the simplest constitution and securely bonded and fixed in a short time. SOLUTION: In the assembling method for the light beam scanner which uses a rotary polygon mirror as an optical deflecting means to pass respective deflected beams through the imaging lenses stacked in two upper and lower stages after making light beams from independent light sources incident individually on deflecting and reflecting surfaces of the rotary polygon mirror and deflecting them and then converges them as light spots on one or more photosensitive bodies to scan the photosensitive bodies, photosetting adhesives are applied between an optical box and the lower-stage imaging lens, and the lower-stage imaging lens and upper-state imaging lens, the lower-stage imaging lens is put on the optical box and the upper-stage imaging lens is put on the lower- stage imaging lens, and the lower-stage imaging lens and upper-stage imaging lens while stacked in two stages are fixed to the optical box by light irradiation from above the upper-stage imaging lens.
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