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81. 发明专利

JPH10269672A OPTICAL DISK RECORDING/REPRODUCING DEVICE 失效
公开(公告)号：JPH10269672A
公开(公告)日：1998-10-09
申请号：JP9164197
申请日：1997-03-26
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO , OHIRA TSUNEHISA
IPC分类号： G11B17/26
摘要： PROBLEM TO BE SOLVED: To shorten the time required for exchanging an optical disk. SOLUTION: This device is provided with a cartridge housing part 3 for housing cartridge cases 9 wherein the optical disks D1-D4 are containable, a disk holding/exchanging means 6 for positioning plural housed optical disks successively to the recording/reproducing position while holding these disks, a recording/reproducing means 7 for recording/reproducing the positioned optical disks, a disk loading/unloading means 4 for performing the receipt/delivery of the optical disks between the cartridge housing part 3 and the disk holding/ exchanging means 6, and a system control part 27 for controlling so that the plural optical disks are returned to the cartridge when the information recording/reproducing operation is completed against the optical disks kept to be held by the disk holding/exchanging means 6, Thus the optical disk is dropped one by one for every time the recording/reproducing operation of one optical disk is completed, and a new optical disk is set to the recording/reproducing position.

82. 发明专利

JPH10143920A OPTICAL DISK, ITS MANUFACTURE AND RECORDING/REPRODUCING DEVICE 失效
公开(公告)号：JPH10143920A
公开(公告)日：1998-05-29
申请号：JP31698396
申请日：1996-11-12
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G11B7/00 , G11B7/0037 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/30
摘要： PROBLEM TO BE SOLVED: To provide an optical disk capable of forming a high recording density disk with an optimum condition even for either of a reproduction exclusive area and a recording/reproducing area. SOLUTION: A reproduction only disk 10 is formed with the reproduction exclusive area on its outer peripheral side, and a recording/reproducing disk 20 is formed with a recording/reproducing area 22 on its inner peripheral side. The disks 10, 20 are manufactured respectively separately with the optimum condition. These disks 10, 20 are stuck to each other with adhesive, and the optical disk 30 is manufactured. Incidence and emission of light are performed from one side surface of the optical disk 30 by an optical pickup 32 for reproducing or recording/reproducing information for the optical disk 30, and the reproduction or the recording/reproducing is performed.

83. 发明专利

JPH09147362A DOUBLE-SIDED OPTICAL DISK RECORDING/REPRODUCING METHOD 失效
公开(公告)号：JPH09147362A
公开(公告)日：1997-06-06
申请号：JP32966295
申请日：1995-11-24
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO , EGUCHI HIDEJI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide a method excellently recording or reproducing a recordable double-sided optical disk using a sheet of pre-format substrate. SOLUTION: This method is a recording method of the double-sided optical disk successively laminating a first recording layer 2, a light shielding layer 3, a second recording layer 4 and a second translucent substrate 6 on a first translucent substrate 1 in the order, and in the case information is recorded on the first recording layer 2, laser light irradiates the layer 2 through the first translucent substrate 1, and the recording is performed based on the information reproduced from a pre-format signal while performing tracking control using reflection light from the first recording layer 2 and the light shielding layer 3. Further, in the case the information is recorded on the second recording layer 4, the laser light irradiates the layer 4 through the second translucent substrate 6, and the recording is performed based on the information reproduced from the pre-format signal while performing the tracking control using the reflection light from the second translucent substrate 4 and the light shielding layer 3.

84. 发明专利

JPH08221802A OPTICAL DISK 失效
公开(公告)号：JPH08221802A
公开(公告)日：1996-08-30
申请号：JP4642095
申请日：1995-02-10
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G11B7/24
摘要： PURPOSE: To obtain an optical disk suitable for high-density recording and reproduction thereof by suppressing the coma aberrations increasing with an increase in recording density to a lower level while assuring the rigidity necessary for handling by specifying the thickness over the entire part of the optical disk to a standard thickness in an optical disk of a plural plate constitution. CONSTITUTION: The ordinary optical disk having the plural plate constitution is stuck with substrates of the same thickness. The thickness d1 of the transparent first substrate 1 on the side where light beams transmit is made smaller than the thickness d2 of the other second substrate 3 and the thickness T over the entire part is specified to the standard thickness. An information medium layer 2 is formed on the first substrate 1 and both substrates 1, 2 are stuck via an adhesive layer 4. The thickness d1 of the first substrate is set at a value at which (NA) /λ}.d1 attains a permissible value (for example, the corresponding value of a CD) or below when the numerical aperture of the objective lens of an optical pickup is defined as NA and the wavelength of the light beam as λ.

85. 发明专利

JPH0773475A OPTICAL DISK 失效
公开(公告)号：JPH0773475A
公开(公告)日：1995-03-17
申请号：JP23916593
申请日：1993-08-31
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G11B7/007 , G11B7/24
摘要： PURPOSE:To obtain a tracking error signal of high precision with respect to the optical disk which has information tracks provided in guide grooves and between guide grooves to have a high recording density. CONSTITUTION:On this optical disk, information is recorded not only in circularly formed and recessed guide groove parts T1, T3, and T5 but also in parts T2 and T4 between guide grooves, and a preformat signal is formed in the guide groove part by information pits PG projecting from a bottom face BF of the guide groove part, and the preformat signal is formed in the part between guide grooves by information pits PL recessed from an upper face UF of the part between guide grooves. Thus, the tracking control of high precision is possible.

86. 发明专利

JPH06309673A OPTICAL DISK AND ITS RECORDING AND REPRODUCING METHOD 失效
公开(公告)号：JPH06309673A
公开(公告)日：1994-11-04
申请号：JP11914993
申请日：1993-04-22
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO , EGUCHI HIDEJI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/007 , G11B7/24
摘要： PURPOSE:To make use of either of a CLV rotation system and a CAV rotation system possible and to perform stable tracking control even in the case of a high track density. CONSTITUTION:In the optical disk 5 having a spiral or concentric guide groove 6, one peripheral part 8A of this guide groove is displaced in the groove widthwise direction in accordance with a 1st frequency modulation signal for CLV rotation, and the other peripheral part 8B is displaced in the groove widthwise direction in accordance with a 2nd frequency modulation signal for CAV rotation. By this method, both systems of CLV rotation control and CAV rotation control can be used for this application.

87. 发明专利

JPH06274896A OPTICAL DISK 失效
公开(公告)号：JPH06274896A
公开(公告)日：1994-09-30
申请号：JP8691593
申请日：1993-03-23
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G11B7/007 , G11B7/24
摘要： PURPOSE:To increase recording density by densifying track density and to enable stable tracking control. CONSTITUTION:In an optical disk for optically reproducing information recorded on a spiral information track T, the spiral information track T is composed of a grooved part provided on a groove G having almost the same width as the track pitch P of the information track T and an non-grooved part provided between the groove L and about one round of the grooved part and about one round of the non-grooved part are alternately provided in the direction of the information track. Consequently, the pitch 2P of a guide groove for tracking is larger compared with the track pitch P, the tracking control is stably performed and the recording areas are not decreased since a track jumping is not necessary.

88. 发明专利

JPH0242650A OPTICAL RECORDING AND REPRODUCING DEVICE FOR INFORMATION SIGNAL 失效
公开(公告)号：JPH0242650A
公开(公告)日：1990-02-13
申请号：JP19129688
申请日：1988-07-31
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G11B7/135 , G11B7/14
摘要： PURPOSE:To improve the simultaneous recording actions of plural information signals, etc., by reflecting and transmitting respective reflected lights from converged points generated by a laser light transmitted through a polarized beam splitter and the laser light reflected at the splitter at and through the polarized beam splitter, thereafter, converging the lights and giving them to photodetectors, respectively. CONSTITUTION:A reflected light Pl 2r from a converged point S2 generated by a laser light Pl 2 transmitted through a polarized beam splitter PBS provided in an optical system is reflected at the polarized beam splitter PBS, thereafter, converged by a collimator lens Lc1 and given to a photodetector PD2. A reflected light Pl 1r from a converged point S1 generated by a laser light Pl 1 reflected at the polarized beam splitter PBS is reflected at the polarized beam splitter PBS, thereafter, converged by a collimator lens Lc2 and given to a photodetector PD1. Thus, the action in the simultaneous recording action and reproducing action or both actions of plural information signals can be executed by one optical head.

89. 发明专利

JPH0227535A OPTICAL REPRODUCING DEVICE FOR INFORMATION SIGNAL 失效
公开(公告)号：JPH0227535A
公开(公告)日：1990-01-30
申请号：JP17668688
申请日：1988-07-15
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G11B7/135 , G11B7/14
摘要： PURPOSE:To prevent crosstalk from being generated by arranging almost the same number of optical fibers as that of apertures of a lens to converge light on the optical fiber at the front plane side of the photoreceiving planes of plural photodetectors, respectively. CONSTITUTION:A polarized beam splitter 4 and a 1/4-wave plate 5 comprise a light isolator, and a convex lens 7 and a cylindrical lens 8 comprise a detecting optical system. And the photodetector PDA is constituted by arranging almost the same number of optical fibers (16-18) as that of apertures of the lens to converge the light on the optical fiber at the front plane side of the photoreceiving plane of each of the plural photodetectors (9-14) in a multiple divided type photodetector PD. Therefore, plural incident light beams to one objective lens 6 are made incident in a state with providing a certain angle against the optical axis of the objective lens 6, and aberration is generated in the light beam, thereby, no light with a large incident angle advances through the optical fiber. In such a way, it is possible to prevent the crosstalk from being generated in the photodetector.

90. 发明专利

JPH0217413A REFLECTING-TYPE OPTICAL ENCODER PLATE 失效
公开(公告)号：JPH0217413A
公开(公告)日：1990-01-22
申请号：JP16756188
申请日：1988-07-05
申请人： VICTOR COMPANY OF JAPAN
发明人： UENO ICHIRO
IPC分类号： G01D5/30
摘要： PURPOSE:To design an optical system with larger degree of freedom and to prevent the change of an output resulting from the surface vibration by forming an encoder plate to have such a cross section in a moving direction that the depth from the plate surface to a wall surface of a pit is continuously changed. CONSTITUTION:A cross section of a rotary encoder disk plate 1 having a pit 3 in a circumferential direction thereof is an isosceles triangle having a plate surface as the base. The depth of the vertex is 3/8lambda, lambda being the wavelength of laser beams. The width is set to be 0.4w-w, e.g., 0.7w wherein (w) represents the diameter of a light spot 6. And the length is elongated. The width of a land portion 4 between pits 3 is set not smaller than the diameter (w), for example, equal to (w). Thus, the relation between the strength of reflecting light and the width of pits 3 when the center of the spot 6 falls on the center of the pit 3 becomes as indicated in Fig. (a). The strength of reflecting light is about 10% when the width of the pit 3 is 0.4-1 times (w), whereby the optical system of the device can be designed with larger degree of freedom. Moreover, even when the diameter (w) of the spot 6 and the reflecting light strength are changed because of the surface vibration when the disk plate 1 is mounted to an input shaft 7 with poor accuracy, an output change is less observed as long as the surface vibration is within a range.

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