US008638646B2 (12) United States Patent (10) Patent N0.: US 8,638,646 B2 Kanatake et a]. (45) Date of Patent: Jan. 28, 2014 (54) OPTICAL INFORMATION PROCESSING (58) Field of Classi?cation Search METHOD AND OPTICAL INFORMATION USPC ......... .. 369/4423, 44.32, 53.23, 53.28, 53.12 PROCESSING APPARATUS See application ?le for complete search history. (56) References Cited (75) Inventors: Yusuke Kanatake, Tokyo (JP); Tomo Kishigami, Tokyo (JP); Yoshihiro U.S. PATENT DOCUMENTS Kiyose, Tokyo (JP); Nobuo Takeshita, Tokyo (JP) 6,023,449 A * 2/2000 Chung .. 369/112.23 7,551,371 B2* 6/2009 Abe . . . . . . . . . . . . . .. 359/719 (73) Assignee: Mitsubishi Electric Corporation, 2002/0018406 A1* 2/2002 Yamada ........... .. 369/4423 2002/0114231 A1* 8/2002 Shirakawa et a1. 369/4432 Tokyo (JP) 2002/0150016 A1* 10/2002 Yasuda et a1. ............ .. 369/5322 2004/0136281 A1 7/2004 Yanagisawa et a1. Notice: Subject to any disclaimer, the term of this 2005/0047291 A1* 3/2005 KuZe et a1. ............... .. 369/4432 patent is extended or adjusted under 35 (Continued) U.S.C. 154(b) by 77 days. FOREIGN PATENT DOCUMENTS (21) Appl. No.: 13/128,031 JP 2002-324328 A 11/2002 (22) PCT Filed: Dec. 7, 2009 JP 2004-95106 A 3/2004 (Continued) (86) PCT No.: PCT/JP2009/006670 Primary Examiner * Thomas Alunkal § 371 (00)’ (74) Attorney, Agent, or Firm * Birch, Stewart, Kolasch & (2), (4) Date: May 6, 2011 Birch, LLP (87) PCT Pub. No.: WO2010/067575 (57) ABSTRACT An optical information processing method and apparatus per PCT Pub. Date: Jun. 17, 2010 forms a light irradiating and receiving step, a signal process (65) Prior Publication Data ing step, and an adjusting step of a spherical aberration and a focus offset on the basis of shift amount of ?rst and second US 2011/0235482 A1 Sep. 29, 2011 control devices and a performance evaluation value. The per formance evaluation values for ?rst, second, third and fourth (30) Foreign Application Priority Data points in an X and y coordinate system are detected, in Which an X-coordinate is one of the shift amount of the ?rst control Dec. 10, 2008 (JP) ............................... .. 2008-314348 device and the shift amount of the second control device and Oct. 2, 2009 (JP) ............................... .. 2009-230314 a y-coordinate is the other, the ?rst point, second and third points having the same y-coordinate and different X-coordi (51) Int. Cl. nates With each other, the fourth point being provided on a G11B 7/00 (2006.01) ?rst straight line passing through the ?rst point and being (52) US. Cl. different from the ?rst point. USPC ................ .. 369/4432; 369/4423; 369/5312; 369/5323 24 Claims, 22 Drawing Sheets 40%|: 17 m“ “I 1 15 1 4 A}? 3 22 1s J =5 ( ) ( ) ( ----- h.‘ ' 12 LASER _ DRIVER LIGHT 20 REcEIvER 21 {r g 24 26 J l / REPRODUCTION FOCUS ERROR TRACKING ERROR SERVO 3 EQUALIZER < SIGNAL SIGNAL SIGNAL SIGNAL '_“'-_ _' GENERATOR GENERATOR ,4 GENERATOR GENERATOR s2 31 l /27 23 24a 24b REPRODUCTION REPRODUCTION TRACKING ERRoR Focus SPHERICAL JITTER SIGNAL AMPLITUDE SIGNAL AMPLITUDE 28 OFFSET ABERRATION DETECTOR DETECTOR '' 25 DErEcToR ADJUSTER ADJUSTER + + v T__:._._ 0 CENTRAL CONTROL UNIT 29 US 8,638,646 B2 Page 2 (56) References Cited 2009/0080298 A1 * 3/2009 Yamasaki et a1. ........ .. 369/4423 U.S. PATENT DOCUMENTS FOREIGN PATENT DOCUMENTS 2005/0052964 A1 * 3/2005 Fujita et a1. .............. .. 369/4429 JP 2004-145987 A 5/2004 2005/0141363 A1 6/2005 Shimamoto et a1. JP 2005-196947 A 7/2005 2006/0062098 A1 * 3/2006 Miyake et a1. ........... .. 369/4411 JP 2006-139841 A 6/2006 2006/0104183 A1 * 5/2006 Kataoka et a1. ........ .. 369/11201 JP 2007-80423 A 3/2007 2007/0058501 A1 3/2007 Kurokawa et a1. JP 2007-87483 A 4/2007 2007/0064552 A1 3/2007 Kurokawa et a1. JP 2007-122815 A 5/2007 2007/0159951 A1 * 7/2007 Sagara ........................ .. 369/106 JP 2007-141377 A 6/2007 2008/0056077 A1 * 3/2008 . 369/4423 2009/0059742 A1 * 3/2009 Luyten et a1. ............ .. 369/4423 * cited by examiner US. Patent Jan. 28, 2014 Sheet 4 0f 22 US 8,638,646 B2 E<mkmwg 0 N1. mp6 oNo 2.0 2d 2.0 US. Patent Jan. 28, 2014 Sheet 5 0f 22 US 8,638,646 B2 A E852 No NI oNo 2.0 2.0 US. Patent Jan. 28, 2014 Sheet 6 0f 22 US 8,638,646 B2 ....... ZlOzmgFm<MmmImamw< @E63199 FOCUS OFFSET FOCUS OFFSET FOCUS OFFSET zmu|r_g<Om_mmmmImn_zw FOCUS OFFSET FOCUS OFFSET FOCUS OFFSET US. Patent Jan. 28, 2014 Sheet 7 0f 22 US 8,638,646 B2 WO323c9mc:5m “o ; AxZ|O_Axz<|F0g_g_E<hWvOEq__mMgmm_mQmvI;Im&Qnwm _ z:w 8:||l|xl|:| 3033% W33 T Aa? 0 0 F F S E m w$2.55? HQ6969 .S5 z.wZ55gQmEmw}mEgw w.Fu FOCUS OFFSET FOCUS OFFSET FOCUS OFFSET US. Patent Jan. 28, 2014 Sheet 8 0f 22 US 8,638,646 B2 4a km lZzOruzimwmImmmwZ Pm, 396555.99 FOCUS OFFSET FOCUS OFFSET 92.532 .> 559 FOCUS OFFSET FOCUS OFFSET
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