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71. 发明专利

JPH08287472A INFORMATION REPRODUCING DEVICE 失效
公开(公告)号：JPH08287472A
公开(公告)日：1996-11-01
申请号：JP9093095
申请日：1995-04-17
申请人： CANON KK
发明人： OTA SHINICHI
IPC分类号： G11B7/00 , G11B7/0033 , G11B7/005 , G11B11/105 , G11B20/10
摘要： PURPOSE: To reduce a jitter amt. due to the fluctuation of an information reproducing signal caused by various causes and to attain stable and high reliable information reproduction in an information reproducing device for reproducing digital information recorded on an optical card with a length of a mark and a pitch between marks by providing a phase compensating means for correcting a phase characteristic of the whole information. CONSTITUTION: The digital information recorded in a changing form of the length of the mark and the pitch between the marks in read out, and this read- out signal is binarized after electrical coupling, and is then reproduced. A phase compensating circuit 3 is provided here for the purpose of correcting a phase distortion in an electric system until the signal is binarized. Then, in the case of simultaneous reproduction of plural tracks, at least one regenerative signal processing circuit out of plural regenerative signal processing circuits corresponding to these tracks is provided with the phase compensating circuit 3.

72. 发明专利

JP2547735B2 失效
公开(公告)号：JP2547735B2
公开(公告)日：1996-10-23
申请号：JP14780086
申请日：1986-06-23
申请人： CANON KK
发明人： SAKAGAMI WATARU
IPC分类号： G11B7/00 , G06F3/08 , G11B7/0033 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B19/02 , G11B20/10 , G11B20/12 , G11B27/00 , G11B27/32

73. 发明专利

JP2541239B2 失效
公开(公告)号：JP2541239B2
公开(公告)日：1996-10-09
申请号：JP25313587
申请日：1987-10-07
申请人： OMRON TATEISI ELECTRONICS CO
发明人： HINOTO OKIFUMI
IPC分类号： G11B20/10 , G11B7/00 , G11B7/0033 , G11B7/0045 , G11B19/06 , G11B19/12

74. 发明专利

JPH08255346A OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH08255346A
公开(公告)日：1996-10-01
申请号：JP5738395
申请日：1995-03-16
申请人： CANON KK
发明人： INOUE MASATO
IPC分类号： G11B7/00 , G11B7/0033 , G11B7/0045 , G11B20/18
摘要： PURPOSE: To provide a more exact verify signal by performing the substration between signals for verifies obtained from front and rear two optical spots for verifies of the optical spot for recording. CONSTITUTION: This device is provided with a semiconductor laser 21, a collimating lens 23, a diffraction grating 50, a quarter wave plate 27, an objective lens 28, a spherical lens 29, a cylindrical lens 30 and a hotodetector 31 and these optical elements are integrated as an optical head and an optical card 1 being an information recording medium is irradiated with plural light beams. The optical card 1 is mounted on a carriage (not shown in the figure) and the carriage is constituted so as to be reciprocatingly moved in an information track direction by a moving mechanism (not shown in the figure). Consequently, the optical head and the optical card 1 are reciprocatingly moved in the information direction relatively and since light beams reciprocatingly scan on an information track, information are recorded on the information track or recorded information are reproduced.

75. 发明专利

JPH08255345A OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH08255345A
公开(公告)日：1996-10-01
申请号：JP5738295
申请日：1995-03-16
申请人： CANON KK
发明人： INOUE MASATO
IPC分类号： G11B7/00 , G11B7/0033 , G11B7/0045 , G11B20/18
摘要： PURPOSE: To compensate the level fluctuation of the signal for verification by delaying the signal obtained by reproducing the optical spot for the verification of the side preceding the optical spot for a recording by a prescribed time and performing the dividing among two signals of the signal and a signal obtained by reproducing the optical spot for the verification of the side succeeding to the optical spot for the recording. CONSTITUTION: Optical elements such as semiconductor laser 21, collimating lens 23, diffraction grating 50, polarizing beam splitter 26, quarter-wave plate 27, objective lens 28, spherical lens 29, cylindrical lens 30, photodetector 31 and so forth are integrated as an optical head and an optical card 1 being an information recording medium is irradiated with plural light beams. The optical card 1 is mounted on a carriage (not shown in the figure) and is reciprocatingly moved in an information track direction by a moving mechanism (not shown in the figure). Consequently, the optical head and the optical card 1 are reciprocatingly moved relatively in the information track direction and since light beams from the optical head reciprocatingly scan on an information track, information are recorded on the information track or recorded information are reproduced.

76. 发明专利

JPH08249826A INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING AND REPRODUCING METHOD 失效
公开(公告)号：JPH08249826A
公开(公告)日：1996-09-27
申请号：JP7963295
申请日：1995-03-10
申请人： NIPPON CONLUX CO LTD
发明人： YAMAZAKI KOUICHI , NODA KAZUO
IPC分类号： G06K19/06 , G06F3/06 , G11B7/0033 , G11B7/007 , G11B20/10 , G11B20/12 , G11B27/10 , G11B27/30
摘要： PURPOSE: To obviate the generation of jitters in reproduced signals by enabling to record data from any directions of the relative reciprocating movement of a recording medium, thus increasing a recording speed, allowing the recording of data as far as possible even if the reading out of a certain header part is failed by the defect of the recording medium and also making it possible to surely record the data to the prescribed home positions at every frame. CONSTITUTION: The header parts 4a1, 4b1 recorded with track addresses before and behind information recording tracks 31 are respectively preformatted so that the access to these tracks 21 is made possible from either of the front and rear header parts. Prescribed synchronizing signals are respectively preformatted in storage regions of each of the respective frames consisting of prescribed data sizes so that the additional recording of the information in the storage regions of the prescribed frames is made possible by referencing these synchronizing signals.

77. 发明专利

JPH08203113A OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH08203113A
公开(公告)日：1996-08-09
申请号：JP807195
申请日：1995-01-23
申请人： CANON KK
发明人： YAMADA ETSUO
IPC分类号： G11B7/00 , G11B7/0033 , G11B7/0045 , G11B7/125
摘要： PURPOSE: To discriminate stable high power light and low power light at fast response and to prevent production of scattered light when test irradiation is performed. CONSTITUTION: The output power of light to irradiate an optical information recording medium (C) is controlled by preliminarily performing test irradiation. A light-absorbing material 32 is formed on a mount 21 which holds the recording medium (C) and the light-absorbing material 32 is irradiated with test light when test irradiation is performed.

78. 发明专利

JPH08180146A OPTICAL CARD POSITION DETECTING DEVICE 失效
公开(公告)号：JPH08180146A
公开(公告)日：1996-07-12
申请号：JP32309794
申请日：1994-12-26
申请人： OLYMPUS OPTICAL CO
发明人： HAYASHI YASUO
IPC分类号： G06K13/067 , G06K7/016 , G06K19/06 , G11B7/00 , G11B7/0033 , G11B7/085 , G11B19/02 , G11B19/20
摘要： PURPOSE: To provide an optical card position detecting device which can improve the detection precision of a sector head position as to a multitrack read system. CONSTITUTION: To determine a reference track of the multitrack read system, a track select signal(SEL) is varied from 0 to 5 to select the corresponding track (n-n+4), a selector A47 selects a binarization output corresponding to a precedent beam between read binarization outputs from an A binarization circuit 41a and a B binarization circuit 41b; and the number of edges of a PRE amble is counted as to the read binarization output to judge a track having sector data, and this track is regarded as the reference track.

79. 发明专利

JPH08161753A OPTICAL INFORMATION REPRODUCING DEVICE 失效
公开(公告)号：JPH08161753A
公开(公告)日：1996-06-21
申请号：JP30351094
申请日：1994-12-07
申请人： OLYMPUS OPTICAL CO
发明人： TAKAHASHI HIDEAKI
IPC分类号： G11B7/00 , G11B7/0033 , G11B7/005 , G11B7/013 , G11B20/10
摘要： PURPOSE: To obtain an optical information reproducing device which can positively reproduce recording information regardless of a complex fluctuation of analog read signal. CONSTITUTION: An analog read signal which has been read from a recording medium is converted to digital data by an A/D converter 103 and the digital data are compared with data which have been converted and retained at a memory 104 by a data comparison circuit 106. Based on the comparison result, a slight amount of change of the edge part of the analog read signal is detected separately as the trailing edge part and the leading edge part of an edge detection circuit 109.

80. 发明专利

JP2503971B2 失效
公开(公告)号：JP2503971B2
公开(公告)日：1996-06-05
申请号：JP11185686
申请日：1986-05-15
申请人： OMRON TATEISI ELECTRONICS CO
发明人： TSUTSUI KEIICHI
IPC分类号： G11B7/00 , G11B7/0033 , G11B7/004 , G11B7/135

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