A vibrating gyroscope includes supporting members which are fixed in the vicinity of two node axes n1 and n2 of a bar-shaped vibrator. The groove also receives the infusion tube in a second length shorter than the first length. The light feedback control system may further control the ambient light source and the backlight element, driving them to illuminate alternately, while the optical sensor synchronizes with the backlight element and senses light signals of the backlight element.