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1. 发明专利

JP2001350387A IMAGE FORMING DEVICE AND IMAGE FORMING METHOD 失效
公开(公告)号：JP2001350387A
公开(公告)日：2001-12-21
申请号：JP2000169516
申请日：2000-06-06
申请人： RICOH KK
发明人： KOIDE HIROSHI
IPC分类号： G03G21/14 , B65H5/02 , F16H7/12 , G03G15/00 , G03G15/01 , G03G15/16 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide a means capable of moving at least one of rotating bodies (photoreceptor drums) integrally with a belt without any slippage even when there is load variation in the rotating bodies which are eccentric or uneven in diameter. SOLUTION: The image forming device, by which the rotating bodies (photoreceptor drums) 901, 902, 903 and 904 are integrally moved by driving a carrying belt 915, is provided with a means for highly accurately setting the speed of a load variation correcting control system for canceling the load variation of each rotating body even in the case that the rotating bodies are eccentric or uneven in diameter, and a means for detecting the control error of the control system.

2. 发明专利

JP2001337561A IMAGE FORMING DEVICE AND METHOD OF ITS CONTROL 失效
公开(公告)号：JP2001337561A
公开(公告)日：2001-12-07
申请号：JP2000156933
申请日：2000-05-26
申请人： RICOH KK
发明人： KOIDE HIROSHI
IPC分类号： G03G21/00 , G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming device with which an image of high image quality can be provided by correcting the image forming condition so that deviation in a transfer position of an image on paper or on a carrying belt is prevented for a photoreceptor drum with eccentricity or any variance in its radius. SOLUTION: In the device provided with the photoreceptor drums 101 to 104 each having cross section of circle shape and a carrying belt 115 carrying a paper not shown in figure to which a toner image formed on the photoreceptor drum surface is transferred, a constitution where a part of contact of the carrying belt or the paper and the photoreceptor drum is a vertex of the cross section of the photoreceptor drum in the direction of the carrying belt is provided and the photoreceptor drum and the carrying belt are driven integrally and stably.

3. 发明专利

JP2001126325A MANUFACTURING METHOD OF OPTICAL DISK AND SPUTTERING DEVICE 失效
公开(公告)号：JP2001126325A
公开(公告)日：2001-05-11
申请号：JP2000061733
申请日：2000-03-07
申请人： RICOH KK
发明人： KOTAKA KAZUHIRO , MIZUTA OSAMU , KOIDE HIROSHI
IPC分类号： G11B7/24 , G11B7/26
摘要： PROBLEM TO BE SOLVED: To form a production control information proper to an optical disk substrate without adding a new process to the conventional production line of an optical disk. SOLUTION: The optical disk substrate is represented by 10 and a pattern 13 consisting of the part with a reflection film or a recording film 11 (subsequently called a metallic film) and the part 12 without the same is formed on one part of the innermost peripheral part of the substrate 10. The pattern 13 of the metallic film has the form of bar code information and can be read with a prescribed reproducing device. In the bar code information (pattern) 13, for instance, not only the common information such as the content of information recorded and the rod number of stamper but also the information specific to the substrate such as the production date and the serial number of the media are recorded in a reproducing personal media. In addition, the limitation for duplication permitted to the media, for example, the information of permission or no permission is also recorded. When the region on which the bar code information is recorded is set as an accessible region even in an ordinary reproducing device, the optical disk media having the function as a copy guard is provided.

4. 发明专利

JP2000298838A INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JP2000298838A
公开(公告)日：2000-10-24
申请号：JP10501099
申请日：1999-04-13
申请人： RICOH KK
发明人： KOIDE HIROSHI , OGUCHI TAKEJIRO , MASUI NARIHIRO
IPC分类号： G11B7/00 , G11B7/0045
摘要： PROBLEM TO BE SOLVED: To provide the information recording medium which can precisely record a prepit signal position even during recording. SOLUTION: The information recording medium records at least some of prepits so that patterns in synchronous information are positioned adjacently and performs recording with multipulses based upon pulse strategy when one mark is formed at the time of information recording; when a pattern in the synchronous information which is much longer than a prepit is positioned adjacently to the prepit and the pattern forms a mark, for example, a pulse or space having a nearly constant amplitude is recorded instead not according to the pulse strategy and a prepit position signal can be detected with high precision even during the recording; and precise recording position control is enabled, and consequently a linking area where unnecessary data are recorded is reduced or made unnecessarily to effectively use a recording area.

5. 发明专利

JP2000298832A OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JP2000298832A
公开(公告)日：2000-10-24
申请号：JP10471599
申请日：1999-04-13
申请人： RICOH KK
发明人： WATABE AKIYASU , KOIDE HIROSHI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/0055 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To provide the optical information recording and reproducing device which can accurately and speedily control recording power, erasing power, and bias-level power even when a projection light quantity detector of simple constitution which has its detection band limited is used. SOLUTION: When determining the laser power of bias level of a semiconductor laser 1, the optical information recording and reproducing device corrects the driving current Ib of bias level of a current applying means 5 by a bias level correcting means 17 by using a coefficient based upon the level ratio K of an erasure level and a recording level and also corrects a superposed current Ie" of erasure level of an erasure current superposing means 6 and a superposed current Iw" of recording level of a recording current superposing means 7 by using the coefficient to determine the bias level of the current applying means 5 while holding the peak level and erasure level at optimum values.

6. 发明专利

JP2000182257A METHOD FOR REPRODUCING INFORMATION OF OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JP2000182257A
公开(公告)日：2000-06-30
申请号：JP1668799
申请日：1999-01-26
申请人： RICOH KK
发明人： KOIDE HIROSHI
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To make it possible to detect both signals with high reliability by detecting pits or wobbling by controlling tracking without using a tracking error signal in the neighborhood of a pit position or in a pit detecting window, or controlling to decrease a gain of a tracking control system. SOLUTION: Tracking control is carried out without using a tracking error detection signal at a pit position, and in the position not adjoining the pit, wobbling signal is detected by equalizing each output amplitude of each pair of recording marks in a detection output of a photo-detector which is divided into two straight and opposed to one or more pairs of track tangents of an optical pickup. Otherwise, by detecting a pit by dividing plural groups of photo- detectors into two blocks to the track tangent and controlling a gain, it is possible to reduce deterioration of a signal to noise ratio of a pit signal caused by either meandering of tracking by pit or symmetry of a recording mark in a pit part.

7. 发明专利

JP2000155970A OBJECTIVE LENS-DRIVING DEVICE 失效
公开(公告)号：JP2000155970A
公开(公告)日：2000-06-06
申请号：JP33044698
申请日：1998-11-20
申请人： RICOH KK
发明人： HAGITANI TOSHIMICHI , KOIDE HIROSHI
IPC分类号： G11B7/095 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To speedily correct the tilt of an optical disk. SOLUTION: An elastic member 8 for correcting tilt is flexible in a focusing direction F and is twisted in a radical tilt direction (r) and a tangential tilt direction, so that it is lined up side by side symmetrically for the axis of the radial tilt direction (r). At the same time, when specific conduction is made to focusing coils 13a-13d that are arranged at an objective lens bobbin 10 while sandwiching an axis in a tangential tilt direction (t), an objective lens bobbin 10 (an objective lens 9) is displaced and driven in the focusing direction F, the tangential direction (t), or the radial tilt direction (r) for a track bobbin 3, thus simultaneously adjusting the focus of a light beam for an optical disk and correcting tilt in the tangential tilt direction and the radial tilt direction for the optical disk and hence speedily correcting the tilt of the optical disk.

8. 发明专利

JPH0757279A METHOD FOR CONTROLLING OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0757279A
公开(公告)日：1995-03-03
申请号：JP21480593
申请日：1993-08-09
申请人： RICOH KK
发明人： NAKAYAMA MASAHIKO , KOIDE HIROSHI
IPC分类号： G11B7/085
摘要： PURPOSE:To prevent a land part and a groove part from erroneously accessing in an optical disk device provided with a function recording information on both of the land part and the groove part by performing the access operation of an optical disk after deciding the correspondence of a tracking control condition with a tracking position by tentative tracking operation. CONSTITUTION:An optical pickup is tracked out tentatively the land part L or the groove part G of a fixed area on the optical disk, and whether a tracked position is the land part L or the groove part is discriminated, and the correspondence of the tracking control condition with the tracking position is decided. Then, when the instruction information whether accessing to the land part or the groove part is received, the optical pickup is tracked out the land part L or the groove part G by the dealing tracking control condition, and the recording and reproducing operation of the information is conducted.

9. 发明专利

JPH0276135A OPTICAL DISK DRIVE DEVICE 失效
公开(公告)号：JPH0276135A
公开(公告)日：1990-03-15
申请号：JP22784288
申请日：1988-09-12
申请人： RICOH KK
发明人： HONDA SHUICHI , KOIDE HIROSHI , EMOTO MASAMI , SUZUKI MIKIYOSHI , SHIGEMORI TOSHIHIRO
IPC分类号： G11B7/095 , G11B7/135
摘要： PURPOSE:To increase the speed of a seek operation by freely variably providing a fixed side deflection member in a direction to vary a deflection angle for a movable side deflection member and varying the fixed side deflection member according to a tracking error signal by a detection optical system. CONSTITUTION:A deflecting mirror 41 as the fixed side deflection member is provided freely rotatably and displaceably around a supporting point 43 on a supporting member 42 for a fixed optical system 7, and the fixed optical system 7 changes the deflection angle for a deflecting prism 16 in a movable optical system 6 by rotating and displacing the deflecting mirror 41. This deflecting mirror 41 is rotated and displaced by a drive motor 44 to be drive- controlled by a control means according to the tracking error signal from a detection optical system 17 provided in the fixed optical system 7. Consequently, tracking by the displacement of an objective lens 3 itself becomes unnecessary, and it becomes unnecessary to mount a tracking servo mechanism in the movable optical system 6. Thus, the movable optical system can be lightened, and the high-speed seek operation can be attained.

10. 发明专利

JPH01276455A MAGNETO-OPTICAL DISK DEVICE 失效
公开(公告)号：JPH01276455A
公开(公告)日：1989-11-07
申请号：JP10322088
申请日：1988-04-26
申请人： RICOH KK
发明人： KOIDE HIROSHI , HONDA SHUICHI
IPC分类号： G11B5/02 , G11B11/10 , G11B11/105
摘要： PURPOSE:To cause a magnetic field generating part for magnetic field impression to be compact and light and to reduce energy consumption and heating quantity to be needed for the changing and moving of the magnetic field generating part by supporting the magnetic field generating member of a magneto- optical disk with being movable respectively in the radius direction and thickness direction of the disk. CONSTITUTION:A carriage 33, with which an optical pick-up optical system 32 itself to be provided to an optical disk 31 is positioned on the lower surface of the disk 31 and seek-moved by a driving source in the disk radius direction, a second beam splitter 35 and a photo-detecting element for track signal detection are provided on a base 36. A magnetic head 41 is arranged as the magnetic field generating member in the upper side of the disk 31 and a coil is wound to the central leg of a magnetic path material, which is almost mountain-shaped in a head 41. Then, the direction of a current to the coil is changed and the magnetic field of recording/erasing is impressed to the disk 31. This, head 41 is fitted to the tip of an oscillating member 42 and supported with being freely movable in the radius direction and thickness direction of the disk 31.

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