Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1987-02-27
1989-03-21
Willis, Davis L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356359, G01B 902
Patent
active
048137820
ABSTRACT:
An apparatus for measuring the floating amount of the magnetic head comprising a single color light source such as laser, a rotating glass disk, a light scanner section, a photoelectric converter element, and an interference light strength computing section (or waveform memory section and computer section). Therefore, static behaviors such as pitch angle and balance of the magnetic head can be measured along with dynamic behaviors such as floating and frequency fluctuations thereof. Even when the floating amount of the magnetic head is extremely low, the measurement can be made accurately in a shorter time period with a high S/N ratio.
REFERENCES:
patent: 4593368 (1986-06-01), Fridge et al.
patent: 4627733 (1986-12-01), Wada
Furusawa Hirofumi
Yagi Shigeaki
Alps Electric Co. ,Ltd.
Koren Matthew W.
Malaska Stephen L.
Shoup Guy W.
Willis Davis L.
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