Apparatus for measuring vibration characteristic of head...

Details Apparatus for measuring vibration characteristic of head... Apparatus for measuring vibration characteristic of head...

2007-01-18

2009-06-23

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Vibrator

C073S593000, C073S597000, C073S659000

Reexamination Certificate

active

07549340

ABSTRACT:
An apparatus surely measures the vibration characteristic of a head gimbal assembly and has a wide range of resonance frequencies to be set, the apparatus has a first laser Doppler vibrometer to detect a vibration velocity of a shaker, a second laser Doppler vibrometer to detect a vibration velocity of a head of the head gimbal assembly fixed to a fixture, and a reflection mirror to orthogonally reflect a laser beam emitted from the first laser Doppler vibrometer toward the fixture fixed to the shaker, and the apparatus finds the vibration characteristic of the head gimbal assembly according to the detected vibration velocities.

REFERENCES:
patent: 5880587 (1999-03-01), Annis et al.
patent: 6008640 (1999-12-01), Tan et al.
patent: 6257543 (2001-07-01), Huelsmann
patent: 6667840 (2003-12-01), Cheong et al.
patent: 7349170 (2008-03-01), Rudman et al.
patent: 7377190 (2008-05-01), Yao et al.
patent: 7421898 (2008-09-01), Acar et al.
patent: 2004-101186 (2004-04-01), None

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