Laser diaphragm FO tester

The utility model discloses a laser diaphragm FO tester. The tester comprises a position determination apparatus, a vibration frequency generation apparatus, a real-time range finding apparatus and a data processing control apparatus. The position determination apparatus is used to move a laser displacement sensor to an optimum measurement position. The vibration frequency generation apparatus is used to promote a tested diaphragm to generate vibration. The real-time range finding apparatus is used to measure vibration amplitudes of the tested diaphragm in different frequencies. The data processing control apparatus is used to control input and output of whole system change parameters and form a curve graph of tested diaphragm vibration amplitudes so that a resonant frequency is acquired. By using the laser diaphragm FO tester with high automation and high precision, a resonant frequency of a loudspeaker diaphragm is conveniently and accurately measured; a quality of a finished product loudspeaker is increase