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公开(公告)号：JPH0512794A
公开(公告)日：1993-01-22
申请号：JP19093091
申请日：1991-07-05
Applicant: SONY CORP
Inventor： FUJINAMI YASUSHI , OSATO KIYOSHI
Abstract: PURPOSE:To prevent reproduced information from being broken at the time of disk replacement. CONSTITUTION:Data reproduced from a disk 2 by a pickup 5 are stored in a buffer memory 6 and the data stored in the buffer memory 6 are transferred to a decoder 5 and processed. A spindle motor 3 is driven until the buffer memory 6 becomes full of data to increase the rotating speed of the disk 2. When the disk 2 is replaced, the data stored in the buffer memory 6 are read out and supplied to the decoder 7.
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公开(公告)号：JPH03113728A
公开(公告)日：1991-05-15
申请号：JP24835489
申请日：1989-09-25
Applicant: SONY CORP
Inventor： OSATO KIYOSHI , NAKAO TAKASHI , NARAHARA TATSUYA
IPC: G11B11/10 , G11B7/09 , G11B11/105
Abstract: PURPOSE:To improve precision by using the difference of a push-pull output signal from a two-divide detector to detect a pair of side spots as a rotation error signal. CONSTITUTION:Light beam side sports S+1 and S-1 are detected by the two- divide light beam spot detectors 4+1, 4-1 respectively. Next, the difference output signals TE+1, TE-1 of output signal from every light beam sport detecting part 4+a, 4+b and 4-a, 4-b are obtained by differential amplifiers 11+1, 11-1. Both the difference output signal TE+1 of the amplifier 11+1 and the difference output signal TE-1 of the amplifier 11-1 are supplied to the differential amplifier 14, and the rotation error signal RE is obtained. By obtaining the rotation error of a light beam spot in such a way, the error of the rotation angle of the light beam spot can be detected by the precision higher than 0.1 deg., and the high preci sion control of the rotation angle of the light beam spot can be executed.
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公开(公告)号：JPH03108132A
公开(公告)日：1991-05-08
申请号：JP24446289
申请日：1989-09-20
Applicant: SONY CORP
Inventor： OSATO KIYOSHI
IPC: G11B7/13
Abstract: PURPOSE:To perform the reading of information satisfactorily by forming the pin hole of an aperture smaller than the beam diameter of return light on a protective layer, and irradiating a center part at a state where the maximum amount of light quantity distribution is applied. CONSTITUTION:An optical detector 5 detects the return light reflected from an optical recording medium 1. Also, the aperture 8 is provided with the pin hole 8a with the diameter smaller than the beam diameter of the return light on the detector 5 from the surface of the protective layer 3 at the light receiving plane of the detector 5. At such a case, a reading optical beam B1 is made incident on the objective lens 4 of the medium 1, and transmits the protective layer 3, and is converged on a signal recording plane 2. Then, it is reflected on the recording plane 2, and is converged on the light receiving plane 5a of the detector 5. The beam B1 is modulated based on an information signal written on the recording plane 2, and the detection signal of the optical detector 5 goes to a reading signal for the information signal. The aperture 8 prevents a scattered light beam B2 arriving at the light receiving plane 5a. Thereby, only the reading signal is projected on the center part of the aperture 8 at a state where the maximum amount of light quantity distribution is applied, which enables the information signal to be read satisfactorily.
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公开(公告)号：JPH0354733A
公开(公告)日：1991-03-08
申请号：JP18927289
申请日：1989-07-21
Applicant: SONY CORP
Inventor： OSATO KIYOSHI , FUKUMOTO ATSUSHI
IPC: G11B7/09
Abstract: PURPOSE:To suppress the fluctuation of the amplitude of a tracking error signal by forming the tracking error signal based on the difference between first and second difference outputs under the state that the level adjustment thereof according to the difference of light quantity between a main light beam and two sub-light beams from a disk-like recording medium is executed. CONSTITUTION:A difference output signal Sm obtained from a subtraction part 46 is directly supplied to one input terminal of a subtraction part 54. On the other hand, a sum output signal Ss obtained from an addition part 50 is supplied to the other input terminal of the subtraction part 54 after the level thereof is adjusted in a level adjustment part 52 by using gain 1/(4.Gs). In the subtraction part 54, the difference between the difference output signal Sm and the sum output signal Ss whose level is adjusted by using the gain 1/(4.Gs) is taken and the difference output signal (=Sm-Ss/(4.Gs) obtained from the subtraction part 54 is conducted as the tracking error signal St. Thus, the track ing error signal is not substantially affected by the positional fluctuation of a beam spot and the tracking error signal that the fluctuation of the amplitude thereof is suppressed is obtained.
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公开(公告)号：JPS6346633A
公开(公告)日：1988-02-27
申请号：JP18838886
申请日：1986-08-13
Applicant: SONY CORP
Inventor： KOBAYASHI SEIJI , OSATO KIYOSHI
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/013 , G11B7/125 , G11B7/126 , G11B7/135 , G11B11/105
Abstract: PURPOSE:To control the output of a laser beam to an optical value by providing an extracting area using a sample/hold circuit to sample and hold the detection output to a part of disk recording area and controlling the output at the recording of a laser diode based on the value of sample/hold. CONSTITUTION:A detection output in a servo area SA1 is held by the sample/ hold circuit 4C, and the detection output in a servo area SA2 is stored in sample/hold circuits 4A, 4B. The output of the laser diode 1 at readout is controlled based on the detection output held in the sample/hold circuit 4C and the output of the laser diode 1 at write/erasure is controlled based on the detection output held in the sample/hold circuits 4A, 4B. Thus, the APC loop is made stable at write/read/erasure and when the mode is switched, the light output of the laser diode 1 is set immediately to the object value.
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Patent Agency Ranking
公开(公告)号：JPS61220152A
公开(公告)日：1986-09-30
申请号：JP6088985
申请日：1985-03-27
Applicant: SONY CORP
Inventor： HENMI FUMIAKI , OSATO KIYOSHI , YAMAGAMI TAMOTSU
IPC: G11B11/10 , G11B11/105
Abstract: PURPOSE:To equalize the recording time to the reproducing time to record a continuous signal in real time by storing data, which should be recorded on the outermost recording track of a disc, in a buffer memory and compressing recording data with respect to time to supply this data to a photoelectric disc. CONSTITUTION:Recording information from a terminal TR of an erasing and recording system of the disc is subjected to A/D conversion, error code addition, and channel code modulation by means 1a, 1b, and 1c respectively in a digital processing circuit 1 and is digitized and is stored in a buffer memory 2. The whole of this system is controlled by a system controller 6 to take information into the memory 2 at the same bit rate as reproducing in the recording mode. At this time, a spindle motor 11 is controlled to two-fold prescribed rotation number, and the power of a light emitting source of an optical pickup device 5 is increased. Every one-track component of data in the memory 2 is read out to a laser drive device by clocks of two-fold bit rate to equalize the recording time to the reproducing time.
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公开(公告)号：JPS6194246A
公开(公告)日：1986-05-13
申请号：JP21586084
申请日：1984-10-15
Applicant: Sony Corp
Inventor： OSATO KIYOSHI
CPC classification number: G11B7/0903 , G11B7/0943 , G11B7/0956
Abstract: PURPOSE: To eliminate the DC fluctuation by irradiating a pair of beams to an optical recording medium at an interval of about 1/2 odd multiple as much as a track pitch, and supplying these output beams to a pair of 2-split photodetecting element to obtain a tracking error signal from the difference between the outputs of both photodetecting elements.
CONSTITUTION: A pair of beams are irradiated to an optical recording medium 5 via an objective lens 4 at an interval of about 1/2 odd multiple as much as a track pitch. The output beams sent from the medium 5 are made incident on a pair of 2-split photodetecting elements 6
1 and 6
2 respectively. Then a tracking error signal is obtained from the difference between outputs of both elements 6
1 and 6
2 . Thus this error signal contains virtually no DC fluctuation. In other words, it is possible to eliminate the DC fluctuation of the tracking error signal which is caused by a rateral shift of the lens 4 or a radial skew of the medium 5.
COPYRIGHT: (C)1986,JPO&JapioAbstract translation: 目的：为了消除DC波动，通过以大约1/2奇数倍的轨道间距将光束照射到光学记录介质上，并将这些输出光束提供给一对2分裂光电检测元件 从两个光电元件的输出之间的差中获得跟踪误差信号。 构成：一对光束经由物镜4以与轨道间距大约1/2奇数倍的间隔照射到光记录介质5。 从介质5发出的输出光束分别入射到一对二分光电检测元件61和62上。 然后，从元件61和62的输出之间的差获得跟踪误差信号。因此，该误差信号几乎不包含直流波动。 换句话说，可以消除由透镜4的横向偏移或介质5的径向偏斜引起的跟踪误差信号的DC波动。
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公开(公告)号：JP2007052864A
公开(公告)日：2007-03-01
申请号：JP2005237832
申请日：2005-08-18
Inventor： YAMAMOTO KENJI , HINENO SATORU , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup apparatus and an optical disk system corresponding to a BD (Blu-ray disc)(R) having ≤0.1 mm disk substrate thickness and also to an optical disk whose disk substrate has thickness thicker than 0.1 mm. SOLUTION: A laser beam emitted from a semiconductor laser 31 is transmitted through a polarization beam splitter 34, a diameter of the luminous flux thereof is compensated by a collimator lens 34 to be a parallel beam, then spherical aberration and the numerical aperture NA thereof are compensated by a compensation element 36 via a raising mirror 35 and a linearly polarized beam of the semiconductor laser 31 is changed into a circularly polarized beam by a 1/4 wavelength plate 37. Information tracks on the optical disk 2 is illuminated with the circularly polarized light via an objective lens 38. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 要解决的问题：提供对应于具有≤0.1mm盘基底厚度的BD（蓝光盘）（R））的光学拾取装置和光盘系统，并且还提供一种光盘，其盘片基板具有厚度 厚度大于0.1毫米。 解决方案：从半导体激光器31发射的激光束透射通过偏振分束器34，其光束的直径由准直透镜34补偿为平行光束，然后球面像差和数值孔径 NA由补偿元件36经由升反射镜35补偿，半导体激光器31的线偏振光束由1/4波长板37变成圆偏振光束。光盘2上的信息轨迹被照亮 通过物镜38的圆偏振光。（C）2007，JPO＆INPIT
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公开(公告)号：JP2006350227A
公开(公告)日：2006-12-28
申请号：JP2005179526
申请日：2005-06-20
Applicant: SONY CORP
Inventor： KISHIMA KOICHIRO , OSATO KIYOSHI
IPC: G02F1/13 , G02F1/133 , G02F1/1335 , G02F1/13363 , G02F1/1337 , G02F1/1343 , G11B7/135
Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal device in which delay of response time at low temperature is solved and its temperature adjusting method, and to provide a practical optical pickup device and an optical recording/reproducing device using the liquid crystal device. SOLUTION: The liquid crystal device 20 comprises a pair of substrates 21, 22, a liquid crystal 23 interposed in between, and electrodes 24, 25 respectively disposed on the insides of the pair of substrates 21, 22, wherein a fine pattern 29 which does not affect phase distribution of light passing through the liquid crystal device is formed on at least one electrode 25 out of the electrodes, and a pair of electrode terminals are arranged on the electrode 25 with the fine pattern 29 formed thereon. Temperature adjustment is conducted by applying a voltage to the electrode terminals to make the electrode 25 function as a heater, and by heating the liquid crystal 23. COPYRIGHT: (C)2007,JPO&INPIT
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公开(公告)号：JP2002150598A
公开(公告)日：2002-05-24
申请号：JP2000338137
申请日：2000-11-06
Applicant: SONY CORP
Inventor： YAMAMOTO KENJI , OSATO KIYOSHI , KATO YOSHIAKI
IPC: G02B7/00 , G02B13/00 , G02B27/00 , G11B7/135 , G11B7/1376 , G11B7/1392
Abstract: PROBLEM TO BE SOLVED: To always keep constant a light quantity incident on the aperture diaphragm of an object lens while correcting a spherical aberration by preliminarily passing a luminous flux incident on the object lens through an expander lens and also to make performable excellent writing and reading of an information signal to an optical recording medium by not changing rim intensity(RI). SOLUTION: The aperture diaphragm 6 of the object lens 7 is positioned at the focal position of a second lens group 5b of the side close to the object lens 7 consisting of the expander lens 5.
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