Title:
DISK IMAGE ACQUISITION DEVICE
Document Type and Number:
Japanese Patent JP2019160194
Kind Code:
A
Abstract:
To provide a disk image acquisition device that can reliably detect the contour of a disk even when reflectance of a disk surface is reduced.SOLUTION: An illumination unit 10 irradiates one surface Ds1 of a disk D with illumination light at least including a first color component and a second color component different in wavelength from the first color component. A background part 50 is arranged on the other surface Ds2 side of the disk D, and a surface 50a of the background part 50 opposed to the other surface Ds2 of the disk D forms a background region BR outside a contour De of the disk D. The background part 50 reflects illumination light of the first color component, and absorbs illumination light of the second color component. An imaging device 24 acquires a first captured image corresponding to reflection light of the first color component and a second captured image corresponding to reflection light of the second color component.SELECTED DRAWING: Figure 1
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Inventors:
SUZUKI HIROSHI
Application Number:
JP2018049689A
Publication Date:
September 19, 2019
Filing Date:
March 16, 2018
Export Citation:
Assignee:
ASAHI SEIKO CO LTD
International Classes:
G07D5/02
Domestic Patent References:
| JP2017142737A | 2017-08-17 | |||
| JPH06274736A | 1994-09-30 | |||
| JP2012226406A | 2012-11-15 | |||
| JP2014053739A | 2014-03-20 |