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Optical information processing apparatus and optical information processing method, and ... PDF

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US 20140355403A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2014/0355403 A1 Kishigami et al. (43) Pub. Date: Dec. 4, 2014 (54) OPTICAL INFORMATION PROCESSING Publication Classi?cation APPARATUS AND OPTICAL INFORMATION PROCESSING METHOD, AND ADJUSTMENT (51) Int- Cl DEVICE, ADJUSTMENT METHOD, AND GIIB 7/1392 (2006-01) ADJUSTMENT PROGRAM FOR OPTICAL GIIB 7/1398 (2006.01) INFORMATION PROCESSING APPARATUS (52) US. Cl. CPC ........ .. GIIB 7/13925 (2013.01); GIIB 7/1398 (71) Applicant: Mitsubishi Electric Corporation, (201301) Chiyoda-ku, Tokyo (JP) USPC ..................................................... .. 369/47.49 (72) Inventors: Tomo Kishigami, Tokyo (JP); Nobuo (57) ABSTRACT TakeShlta’ TOkyO (JP) An optical information processing apparatus includes: a unit that radiates light onto an optical disc and detects the re?ected (73) Assignee: MITSUBISHI ELECTRIC light to output a reproduced signal; a unit that corrects spheri CORPORATION, Tokyo (JP) cal aberration of the light; a unit that adjusts a focus position of the light based on a focus adjustment value; and an adjust (21) APP1- NOJ 14/374,866 ment unit that measures a characteristic of the reproduced signal at each of at least three positions on each of at least (22) PCT Filed: Feb- 21: 2013 three straight lines on a plane With coordinate axes represent ing an amount of spherical aberration correction and focus (86) PCT NO': PCT/JP2013/054273 adjustment value, obtains, from the measurements, as esti § 371 (OX1), mated positions, at least ?ve positions on the plane at Which (2), (4) Date; JUL 25, 2014 the characteristic has substantially the same value, performs an ellipse approximation on the estimated positions, obtains a (30) Foreign Application Priority Data center of the ellipse, and determines the amount of spherical aberration correction and focus adjustment value based on the Mar. 22, 2012 (JP) ............................... .. 2012-065713 center of the ellipse. OPTICAL INFORMATION PROCESSING APPARATUS 240~ BUFFER MEMORY # HEAD AMPLIFIER ¢~~ 110 20L I» > CPU 210 REPRODUCED SIGNAL $120 RECEIVING PROCESSING UNIT 321 ROM L 220 ELEMENT I ' j ‘ SIGNAL QUALITY RAM A 230 320 3 MEASUREMENT UNIT '4’ 20' I A DIQS/ENRG §G\ 122 , DATA DECODER 1 Focus CIRCUIT , 300 123w REPRODUCING ADJUSTMENT ( I > CHARACTERISTIC -> UNIT I 130 MEASUREMENT UNIT 202 l , m $1 FE SIGNAL GENERATING UNIT j—a' ADJUSTMENT 150 TE SIGNAL GENERATING UNIT UNIT 140 TE SIGNAL C%§?R%EB%% CHARACTERISTIC ~> T 141w MEASUREMENT UNIT ~—-——-1 SPHERICAL ABERRATION CORRECTION UNIT if 160 ~—————————{ ACTUATOR CONTROL UNIT L-——-—-— CENTRAL ————-—————1 SPINDLE MOTOR CONTROL UNIT p“—\k— 1—70— ——— UNIT \ 180 A 100 400 A HOST CONTROLLER Patent Application Publication Dec. 4, 2014 Sheet 2 0f 18 US 2014/0355403 A1 REPRODUCED SIGNAL I AMPLITUDE (V) {1.8 : ' an ’ - ’ 1. ._ 2 mm an “Visa SPHERICAL ABERRATTON 0 . FOCUS BALANCE VALUE (STEP) “48 ~45 @ CORRECTION AMOUNT (STEP) ‘28 I W 16 i5 i4 13 1'2 69 "15 I ' ,9 /" ~27 ~33 FOCUS BALANCE ‘29 SPHERICAL ABERRATION VALUE (STEP) ~40 CORRECTION AMOUNT (STEP) Patent Application Publication Dec. 4, 2014 Sheet 3 0f 18 US 2014/0355403 A1 REPRODUOED SIGNAL » AMPLITUDE <v> ~— 1.12 ' ~~ 11:»? “MW 1.03 ma FOCUS A ~ ~ £194 BALANCE - A - 9.59 VALUE -------- ~- (184 (STEP) “4% ~42: ~35 ~38 ' ~25 ~29 ~:s SPHERICAL ABERRA'NON CORRECTION AMOUNT (STEP) an _ . i~MLSE (%> an ,_..>..i..i.,...1Ml...n“WY..4.‘l“.‘_.4.i.v._. A <» I n W MA 40 ------ 14.3 —~—~ #52 an FOCUS ---- *- m BVAALLAUNEC E 20 M" “" " x 1 (STEP) m ’ ‘63 a ~10 SPHERICAL ABERRATION CORRECTION AMOUNT (STEP) Patent Application Publication Dec. 4, 2014 Sheet 4 0f 18 US 2014/0355403 A1 6“ TE SIGNAL A E A» ~ AMPLITUDE (v) 3.48 ——--—-Y $.44 FOCUS mm 1‘48 BALANCE .... -. 1,3», VALUE ' ‘ .... m (STEP) ' h ~48 ‘ '5 ’ ~4§ ~40 ~35 “30 ~25 ~25 “15 SPHERICAL ABERRATION CORRECTION AMOUNT (STEP) 69 i g i ; REPRODUOED SIGNAL F i ’ ‘ AMPLITUDE (1.12V) 59 ; —- -- A i-MLSE 49 US$33;‘ ‘‘‘‘ n (34_4%) REPRODUOED U __“jj~_-__ ------- -- TE SIGNAL 36 “‘ Abiéiig/bl-DE ~ W " AMPLITUDE (1.4M w “.7.“ my wwixwiiwnm BALANCE A! l i} I: V(ASTLEUPE) “03 = i 1 W10 *3; CENTER “48 9 i ‘ ~45 "#38 ~35 “so -25 ~20 ~15 SPHERICAL ABERRATION CORRECTION AMOUNT (STEP) Patent Application Publication Dec. 4, 2014 Sheet 5 0f 18 US 2014/0355403 A1 FiG.$(a) 1.2 pauq, FE BALANOE 1,1 g0- ~“ ------------ (STEP) ; i A ?'ik. 1;.» \5 ‘23 ""9"" T' 10 P? 1.3 ER -. REPRODUCED 1.0 _ , = W" N A SIGNAL D’ 3A 5 Q‘ "‘3‘ ‘0 AMPLITUDE (v) 0,9 ‘‘‘‘‘‘‘‘‘‘‘ 45‘I fIA' g E "wk" 30 0‘ 8 IVI 9?‘; A: A1 MM.“ 1 v L L . . . . . . . , , . . v. 0.7 ~45 ~40 ~35 ~30 ~25 ~20 ~15 SPHEFHCAL ABERRATION OOPREOTTON AMOUNT (STEP) 1-2 ; 2 SPHERICAL i ABERRATION i CORRECTION 1.1 ' AMOUNT (STEP) -O-~ ~ 34 REPRODUOED 1‘0 SIGNAL ; “'3’ ' 28 AMPLITUDE (V) E 00 18 ? “MA-n .. ~ 40 ~ 20 0 20 40 60 FOCUS BALANCE VALUE (STEP) Patent Application Publication Dec. 4, 2014 Sheet 6 0f 18 US 2014/0355403 A1 Haw) 18.0 FE BALANCE no g (STEP) 16‘0 iiiiiiiiiiiiii A '“ue'w' '“ 15 . i is i"MLSE(°/c) 150 i $5? “8“” 5 i “NA... 25 14.0 " 13.0 r r 12.0 ~45 ~40 "35 “30 "25 "'20 “~15 SPHERICAL ABERRATION CORRECTION AMOUNT (STEP) ‘8'“ SPHERICAL ABERRATION CORRECTKON AMOUNT (STEP) -e~ - 36 "EN ~30 FMLSE (‘36) "NA-u __ ~40 ~20 0 20 4O 60 FOCUS BALANCE VALUE (STEP) Patent Application Publication Dec. 4, 2014 Sheet 7 0f 18 US 2014/0355403 A1 3amo2naoomanmm “2 ivii - mmxiiii-:w8 1..391%.: E.. Q 5kSzmz6wmEz¢w?z QEoWwaS»;E‘Qm“ e 9mantViQs? mgaoisdo:n “ g# 3 EPZmOZFDiOOMrNEEmJOQOv Q@“E m3s.“3. .5m§§9 z.o2?0<wmmawnmm< m$m3wa55?.?1?.?. MOQZw<Am»<inirmixi?v a., .B “ mm .o m 3..Y w34<> Patent Application Publication Dec. 4, 2014 Sheet 8 0f 18 US 2014/0355403 A1 1.15 1,10 .LF--~ -v ;v.; ------!--- REPRODUCED ms SIGNAL ZE PE PE AMPLITUDE (v) mo 0.90 1 ~45 ~40 ~35 ~30 ~25 ~20 ~15 SPHERICAL ABERRATION CORRECTION AMOUNT (STEP) 1.15 MPG-m mmmmmmmmmmm REPRODUCED 1.05 SIGNAL 3; PE PE AMPLITUDE (V) 100 ~40 ~20 O 20 4O 60 FOCUS BALANCE VALUE (STEP) 1.15 1.10 REPRODUOED 1‘05 SIGNAL AMPLXTUDE (v) 1.00 0.95 0.90 ~45 ~40 ~35 ~30 ~25 ~20 ~15 SPHERICAL ABERRATION CORRECTION AMOUNT (STEP) Patent Application Publication Dec. 4, 2014 Sheet 9 0f 18 US 2014/0355403 A1 mama) HQQM) A A L5 \/\/ FOCUS FOCUS BALANCE BALANCE VALUE VALUE SPHERICAL ABERRATION R SPHERZCAL ABERRATION CORRECTION AMOUNT CORRECTION AMOUNT mama) Fimm} A A \ L3 FOCUS FOCUS BALANCE BALANCE VALUE VALUE L1 L2 SPHERICAL ABERRATION § SPHERICAL ABERRATION CORRECTION AMOUNT CORRECTION AMOUNT FIGJZM FlG.12(f) A ' A L5 L2 FOCUS FOCUS BALANCE BALANCE VALUE VALUE SPHERICAL ABERRATION p SPHERICAL ABERRATION CORRECTION AMOUNT CORRECTION AMOUNT

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No.: US 2014/0355403 A1. Kishigami et al. (43) Pub. Date: Dec. 4, 2014. (54) OPTICAL .. SET SPHERIOAL ABERRATION CORRECTION AMOUNT TO xc w 527 . YES. FOCUS BALANCE VALUE. SET FOCUS BALANCE VALUE.
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