Patent ID: 8531795

Claim:
A thermally assisted magnetic head inspection apparatus for inspecting a thermally assisted magnetic head, the thermally assisted magnetic head including a magnetic head portion having an optical waveguide formed thereon, a semiconductor laser, and a sub-mount holding the semiconductor laser, the sub-mount being fixed to the magnetic head portion, laser light emitted by the semiconductor laser entering the optical waveguide of the magnetic head portion, the thermally assisted magnetic head inspection apparatus comprising: a spectrum analyzer configured to measure an oscillation wavelength of the semiconductor laser; a light transmission unit configured to lead light emitted by the semiconductor laser to the spectrum analyzer; and a calculator configured to calculate a temperature of the semiconductor laser on the basis of a wavelength obtained by the spectrum analyzer, wherein the semiconductor laser is driven while changing a light-emitting time percentage and, when the temperature of the semiconductor laser calculated by the calculator falls out of a preset temperature range, the thermally assisted magnetic head is identified as a defective product.