Photosensor device and disk inspection apparatus using it
US7057157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Oct 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photosensor device is provided which includes a light-applying fiber to apply an inspection light to a subject to be inspected; a light-receiving fiber to receive a reflected light from the subject to be inspected; a laser beam source to emit the inspection light to the light-applying fiber; and a photosensor to receive the reflected light via the light-receiving fiber. A disk inspection apparatus for inspecting surface conditions of a disk is also provided which includes a turning table for rotating the disk; a photosensor body disposed opposite to the surface of the disk; and a transfer mechanism for reciprocally transferring the photosensor body in a direction perpendicular to a rotating direction of the disk along the surface of the disk; wherein the photosensor device is utilized as the photosensor body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.