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1. 发明专利

JP2018041524A ホログラム再生装置およびホログラム再生方法审中-公开
公开(公告)号：JP2018041524A
公开(公告)日：2018-03-15
申请号：JP2016175650
申请日：2016-09-08
申请人：日本放送協会
发明人：片野祐太郎 , 室井哲彦 , 木下延博
IPC分类号： G11B7/005 , G03H1/28 , G11B7/128 , G11B7/131 , G11B7/1395 , G11B7/0065
摘要：【課題】クロストークノイズとして他のページデータが重畳された再生ページデータから、クロストークノイズ成分を除去し得るホログラム再生装置およびホログラム再生方法を提供する。【解決手段】記録媒体11に記録された第1ページデータ像情報を担持した第1再生光と、記録媒体11に記録された第2ページデータ像情報を担持した第2再生光の各光路が少なくとも一部において共通化され、第2ページデータ像情報による第2ページデータ画像に第1ページデータ像情報によるノイズ画像が混入してクロストークが生じている場合に、ページデータ画像の一部領域の明るさに対する、ノイズ画像の該一部領域に対応する一部領域の明るさの比率αに基づき、ノイズ画像全体の明るさを求め、第2ページデータ画像からノイズ画像を減算する演算処理手段61を備えている。【選択図】図1

2. 发明专利

JP6288233B2 光ピックアップ装置および光ディスク装置有权
公开(公告)号：JP6288233B2
公开(公告)日：2018-03-07
申请号：JP2016245372
申请日：2016-12-19
申请人：船井電機株式会社
发明人：古賀未青 , ▲濱▼岡美佳 , 篠部光義
IPC分类号： G11B7/131 , G11B7/127 , G11B7/09 , G11B7/1353

3. 发明专利

JPWO2011086951A1 光ヘッド装置及び光ディスク装置有权
公开(公告)号：JPWO2011086951A1
公开(公告)日：2013-05-20
申请号：JP2011545565
申请日：2011-01-17
申请人：三菱電機株式会社
发明人：篠田　昌久 , 昌久篠田 , 宏勲中原 , 宏勲中原 , 正幸大牧 , 正幸大牧 , 中井　賢也 , 賢也中井 , 伸夫竹下 , 伸夫竹下
IPC分类号： G11B7/135 , G11B7/131 , G11B7/1353 , G11B7/1392 , G11B7/1395
CPC分类号： G11B7/0903 , G11B7/094 , G11B7/131 , G11B7/1353 , G11B7/13925 , G11B7/1395 , G11B2007/0013
摘要：光ディスク装置に搭載される光ヘッド装置(3)は回折光学素子(21)と光検出器(22)とを備える。回折光学素子(21)は、反射回折光ビームの0次光成分の一部と反射回折光ビームの±1次光成分とが入射する位置に配置される主回折領域(210)と、反射回折光ビームの±1次光成分が入射せず、反射回折光ビームの0次光成分の他の一部が入射する位置に配置される副回折領域(211A,211B)とを含む。光検出器(22)の主受光部(23)は、主回折領域(210)及び副回折領域(211A,211B)を透過した透過回折光ビームの0次光成分を受光する。副受光部(24,25)は、副回折領域(211A,211B)を透過した透過回折光ビームの+1次光成分及び−1次光成分の少なくとも一方を受光する。

4. 发明专利

JP5065471B2 Optical information reproduction method 有权
公开(公告)号：JP5065471B2
公开(公告)日：2012-10-31
申请号：JP2010279369
申请日：2010-12-15
申请人：パナソニック株式会社
发明人：智忠亀井 , 晃正佐野 , 勝彦安田 , 文朝山崎 , 博昭山本 , 昭浩荒井 , 慎一門脇
IPC分类号： G11B7/09 , G11B7/00 , G11B7/005 , G11B7/085 , G11B7/095 , G11B7/125 , G11B7/13 , G11B7/131 , G11B7/135 , G11B7/1353 , G11B7/1392
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

5. 发明专利

JP3864428B2 失效
公开(公告)号：JP3864428B2
公开(公告)日：2006-12-27
申请号：JP3701795
申请日：1995-02-24
IPC分类号： G02B1/08 , H01S5/022 , G11B7/09 , G11B7/12 , G11B7/123 , G11B7/13 , G11B7/131 , G11B7/133 , G11B7/135 , G11B7/1356 , G11B7/1362 , G11B7/22 , G11B11/105 , H01L31/0232 , H01S5/00 , H01S5/026 , H01S5/042

6. 发明专利

JP2003187469A OPTICAL PICKUP DEVICE 审中-公开
公开(公告)号：JP2003187469A
公开(公告)日：2003-07-04
申请号：JP2001387056
申请日：2001-12-20
申请人： SONY CORP
发明人： KOBAYASHI TAKASHI
IPC分类号： G11B7/09 , G01C3/08 , G11B7/08 , G11B7/131 , G11B7/1353 , G11B7/13 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To stabilize operation by making it possible to detect an S-shaped signal having good symmetry in an optical pickup device which acquires a focus error signal by an SSD (Spot size Detection) method. SOLUTION: This is the optical pickup device which radiates an optical data-storage medium with a laser light, guides at least a reflected light from the optical data-storage medium to a passive element via a diffraction element, and detects the focus error signal by the spot size detection method using a diffracted light. In this case, the passive element is set to be located at a position where it is offset to the side of the difraction element from the focal position of a 0-order light passing through the diffraction element. COPYRIGHT: (C)2003,JPO

7. 发明专利

JP2003161611A DETECTOR FOR AMOUNT OF INCLINATION 审中-公开
公开(公告)号：JP2003161611A
公开(公告)日：2003-06-06
申请号：JP2002261839
申请日：2002-09-06
申请人： SHARP KK
发明人： KOKUBO FUMIO , SAKAI KEIJI , KAMIYAMA TETSUO , MIKI RENZABUROU
IPC分类号： G01B11/26 , G11B7/095 , G11B7/125 , G11B7/13 , G11B7/131 , G11B7/135 , G11B7/1353 , G11B7/1367 , G11B7/1381 , G11B7/1392
摘要： PROBLEM TO BE SOLVED: To provide a device of a simple constitution which can precisely detect the amount of the inclination of a light reflecting object of outgoing light with respect to an optical axis. SOLUTION: A device 21 which detects the amount of inclinations includes a light reflector 24, a light source 26, a condensing means 27 to condense the outgoing light from the light source 26 on the light reflector 24, and a photodetection means 23 to detect the reflected light from the light reflector 24. An optical element 22 related to the condensing means 27 has pieces of a first optical element 31 and a second optical element 32, which are formed so that they may have on the position which is axially symmetric with respect to an optical axis 28 by a predetermined amount of gaps, in the direction of a line 30 which connects an axial center 29 of the light reflector 24 and a condensing position 25 where the light outgoing from the light source 26 is condensed on the light reflector 24 by the condensing means 27. The optical element changes the quantity of the light passing through it and the quantity of the light change by the optical element well corresponds with the amount of the inclination of the light reflector 24. By obtaining the quantity of the light change, the amount of the inclination of the light reflector 24 can be detected with precision. COPYRIGHT: (C)2003,JPO

8. 发明专利

JP2002269753A INFORMATION REPRODUCING DEVICE, SIGNAL PROCESSOR, INFORMATION REPRODUCING METHOD AND OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JP2002269753A
公开(公告)日：2002-09-20
申请号：JP2001070465
申请日：2001-03-13
申请人： PIONEER ELECTRONIC CORP , SONY CORP
发明人： KURIBAYASHI HIROKI , YANAGISAWA TAKAMARO , OGAWA HIROSHI
IPC分类号： G11B19/02 , G11B7/0037 , G11B7/005 , G11B7/007 , G11B7/095 , G11B7/13 , G11B7/131 , G11B7/135 , G11B20/10
摘要： PROBLEM TO BE SOLVED: To provide an information reproducing device which is capable of eliminating the crosstalks from adjacent tracks even in wobbble signals, a signal processor, an information reproducing method and an optical recording medium. SOLUTION: This information reproducing device has a detector 152 which outputs the difference between the individual output signals optically obtainable from a pair of detectors for reading the information of the first track MT, a detector 151 which outputs the difference between the individual output signals optically obtainable from a pair of detectors for reading the information of the second track ST1, a demodulating section 202 which demodulates the detection signal outputted from the detector 152 and a demodulating section 201 which demodulates the detection signal outputted from the detector 151. A coefficient control section 205 extracts the crosstalks derived from the second track ST 1 included in the demodulation signal obtained by the demodulating section 202 and controls a coefficient in accordance with the extracted crosstalks. A crosstalk control section 205 cancels the crosstalks by the calculated coefficient.

9. 发明专利

JP2002245639A OPTICAL DISK DRIVE 失效
公开(公告)号：JP2002245639A
公开(公告)日：2002-08-30
申请号：JP2001039586
申请日：2001-02-16
申请人： NEC CORP
发明人： SHIRAKAWA HIDEKAZU , KATAYAMA RYUICHI
IPC分类号： G11B7/085 , G11B7/09 , G11B7/125 , G11B7/13 , G11B7/131 , G11B7/133 , G11B7/135 , G11B7/1369 , G11B7/1372 , G11B7/1378 , G11B7/1392
摘要： PROBLEM TO BE SOLVED: To detect a thickness error of a transparent substrate without using any special optical system. SOLUTION: The spherical aberration of the light reflected from an optical disk 7 due to thickness error of the transparent substrate distorts a diffracted image on a detection surface and asymmetrically expands it at the front and rear part of the detection surface. This phenomenon is used to detect the thickness error of the transparent substrate 8 by using a general focus error signal detection system. A focus error signal detection system by a knife-edge method is used to detect the difference between the absolute value of the plus-side and that of minus-side peaks of a focus error signal or the difference of the focus positions between the peak point of a focus sum signal and the zero point of the focus error signal, and thus the absolute quantity and the sign of thickness error of the transparent substrate 8 are detected.

10. 发明专利

JP2002216372A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2002216372A
公开(公告)日：2002-08-02
申请号：JP2001014428
申请日：2001-01-23
申请人： PIONEER ELECTRONIC CORP
发明人： OGASAWARA MASAKAZU , ARAKI YOSHITSUGU
IPC分类号： G11B7/09 , G11B7/095 , G11B7/13 , G11B7/131 , G11B7/135 , G11B7/1353 , G11B7/1356 , G11B7/1378
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device which can obtain a tracking error signal by a DPP method when many kinds of optical disks different in the optical disk structure are recorded/reproduced, and which can use a CTC method even in the case of reproducing any optical disk. SOLUTION: The optical pickup device including an irradiation optical system, an optical detection optical system, and a servo signal operation part 410 is equipped with a grating 32 element which is disposed in the optical path of an optical beam of the irradiation optical system, and which is orientated so as to generate 0th order diffracted light, ±1st order diffracted light, and ±2nd order diffracted light from the optical beam, to form respective ±2nd order diffracted light spots on the tracks adjacent to both sides of the track on which a 0th order diffracted light spot is formed, and to form ±1st order diffracted light spots on respective centers of the 0th order diffracted light and the ±2nd order diffracted light, wherein a photo detector 40 is equipped with independent light-receiving elements which receive returned light from the 0th order diffracted light, the ±1st order diffracted light, and the ±2nd order diffracted light spots, respectively.

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