Title:
OPTICAL DISC EVALUATION METHOD AND OPTICAL DISC EVALUATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/108192
Kind Code:
A1
Abstract:
An optical disc evaluation unit (100) comprises a rotation control unit (2) that rotates an optical disc (D), further comprising an information recording face (D2), at a rotation speed slower than the rotation speed of playing the information that is recorded on the information recording face (D2); a light source (3) for projecting light upon the information recording face (D2) of the rotating optical disc (D); a detector (11) that detects a quantity of reflected light from the information recording face (D2); and a radial push-pull signal determination unit (26) that evaluates a wave form of a value based on the quantity that is detected by the detector (11).
Inventors:
YAMASHITA, Satoru (12 Moriya-cho 3-chome, Kanagawa-ku Yokohama-sh, Kanagawa 22, 〒2210022, JP)
Application Number:
JP2011/000671
Publication Date:
September 09, 2011
Filing Date:
February 07, 2011
Export Citation:
Assignee:
JVC KENWOOD HOLDINGS, INC. (12 Moriya-cho 3-chome, Kanagawa-ku Yokohama-sh, Kanagawa 22, 〒2210022, JP)
ＪＶＣ・ケンウッド・ホールディングス株式会社 (〒22 神奈川県横浜市神奈川区守屋町３丁目１２番地 Kanagawa, 〒2210022, JP)
ＪＶＣ・ケンウッド・ホールディングス株式会社 (〒22 神奈川県横浜市神奈川区守屋町３丁目１２番地 Kanagawa, 〒2210022, JP)
International Classes:
G11B7/26; G11B7/004; G11B20/18
Attorney, Agent or Firm:
MORISHITA, Sakaki (2-11-12, Ebisu-Nishi Shibuya-k, Tokyo 21, 〒1500021, JP)
Claims: