In the exposing apparatus of an image forming apparatus or the like, an apparatus
for suppressing the vibration of an optical part has a detector for detecting the
vibrating state of the optical part, and a controller for controlling a vibrator
so as to give the optical part such an appropriate amount of vibration as will
negate the vibration of the optical part. Thereby, it becomes unnecessary to excessively
increase the rigidity of the optical part and thus, a decrease in weight can be achieved.
