Method of inspecting magnetic disk surface
AssigneeFuji Photo Film Co., Ltd.
InventorsFusao Ichikawa, Kiyoharu Michimoto
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Abstract
In a method of inspecting a magnetic disk surface, a magnetic disk web is exposed to a light beam, information on the condition of reflection of the light beam by the magnetic disk web or passing of the light beam through the magnetic disk web is detected, and the condition of surface defects of a magnetic disk is judged based on results obtained by the detected information. The judgement is carried out based on the results at a portion of the magnetic disk web outside of a non-use region of the magnetic disk.
Claims5
A method of inspecting a magnetic disk surface by exposing a magnetic disk web to a light beam, detecting said light beam following exposure to said magnetic disk web, and judging the condition of surface defects of a magnetic disk based on results obtained by the detected information,
- wherein the improvement comprises the step of carrying out said judgment based on said results at a portion of said magnetic disk web outside of a non-use region of the magnetic disk.
Dependencies are inferred from the claim text.