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1. 发明专利

JPH01271941A MASTER OPTICAL DISK RECORDER 失效
公开(公告)号：JPH01271941A
公开(公告)日：1989-10-31
申请号：JP9813088
申请日：1988-04-22
申请人： HITACHI LTD , HITACHI MAXELL
发明人： TAJIMA TAKESHI , HARA FUMIO , HAYAMA MASAFUMI , KANETOMO MASABUMI , MATSUO AKIHIKO , KONDO YOSHIMASA , KAWAGUCHI KOJI
IPC分类号： F16C17/00 , F16C29/12 , F16H25/20 , G11B7/26
摘要： PURPOSE:To attain highly accurate positioning by forming the moving mechanism of a moving base, on which a moving optical system is loaded, with slide elements such as a slide screw, slide bearings and slide guides and further, using together a mechanism to lighten the weight of the moving base. CONSTITUTION:A moving base 18 on which a moving optical system 17 is loaded is moved to a glass disk 11 by a precision lap screw 24 supported by bearings 22 and 23. The base 18 is provided with a V-groove 26 and slides on two guide bars 28 through PTFE resin 29. Further, the base 18 is provided with a semicircular air bearing 30 opposite to the bar 28 and a spring 32 is provided with a spacer 31 between it and the base 18. The thickness of the spacer 31 is changed and the spring is bent to generate upward force. Compressed air 33 is supplied to the bearing 30, blown out to the bar 28 through a nozzle and floats the bearing when moving. By lightening the weight of the base 18 and making its movement smooth like this, the highly accurate positioning is attained.

2. 发明专利

JPS62251717A DEVICE FOR CORRECTING DIRECTION OF LASER BEAM 失效
公开(公告)号：JPS62251717A
公开(公告)日：1987-11-02
申请号：JP9455886
申请日：1986-04-25
申请人： HITACHI LTD , HITACHI MAXELL
发明人： ITO SHO , HARA FUMIO , WATANABE HITOSHI , HAYAMA MASAFUMI
IPC分类号： G11B7/09 , G02B26/10
摘要： PURPOSE:To eliminate the necessity of any excessive optical system and make the design, assemblage, and adjustment of a precise optical working machine easier, by making parallel laser beams having fixed emitting directions and locations obtainable even when the emitting direction from a laser device varies. CONSTITUTION:Laser beams separated by a beam splitter 8 are converged on a two-dimensional position sensor 6 by a lens 7 and an output voltage is produced in accordance with the laser beam position on the sensor 6. The output voltage is compared with a reference voltage at a comparator circuit 5 and a two-axis driving mechanism 4 is driven by outputting a voltage proportional to the difference so as to move a lens 2 in order to make the emitting directions of the beams parallel with each other. The laser beams are further separated by another beam splitter 12 and irradiated upon another two-dimensional position sensor 11 and a voltage is outputted in accordance with the position of the laser beam on the sensor 11. A comparator circuit 10 compares the output voltage with a reference voltage and outputs a voltage proportional to the difference. The voltage drives a two-directional angle driving mechanism and inclines a beam shifter 3 against the direction of the laser beams so as to make the directions and positions of the passed laser beams constant.

3. 发明专利

JPH01134734A LASER DEVICE FOR OPTICAL DISK 失效
公开(公告)号：JPH01134734A
公开(公告)日：1989-05-26
申请号：JP29055587
申请日：1987-11-19
申请人： HITACHI MAXELL
发明人： YASUI TOSHIAKI , NUNOMURA TOYOYUKI , KANAZAWA YASUNORI , HAYAMA MASAFUMI
IPC分类号： G11B7/135
摘要： PURPOSE:To prevent the fluctuation of the wavelength of a laser beam due to an air flow by covering a light path from a laser device up to a mobile body with a freely expandable/contractable shielding body. CONSTITUTION:In the case of the servo system of the cutting device of an optical disk master board, the device is mainly composed of a spindle 2 to rotate a master board 1, a laser device 4 for cutting mounted on a carriage 3, a laser interference length measuring machine 5 to apply a feeding servo to the carriage 3, and a shielding body 6 between the carriage 3 and laser interference length measuring machine 5. The laser interference length measuring instrument 5 is faced to a reflecting mirror 14 for measuring in which the exit surface of a beam splitter 16 is added to the carriage 3, and a light path 18 for measuring is composed between the reflecting mirror 14 and beam splitter 16. Since the carriage 3 is relatively operated to the laser interference length measuring machine 5, the shielding body 6 is formed to be expandable and contractable, and the influence of the air flow upon the light path 18 for measuring is completely interrupted. Thus, the wavelength fluctuation of the laser beam can be prevented.

4. 发明专利

JPS61152378A SCREW DRIVER USING ULTRASONIC MOTOR 失效
公开(公告)号：JPS61152378A
公开(公告)日：1986-07-11
申请号：JP27170084
申请日：1984-12-25
申请人： HITACHI MAXELL
发明人： KUMADA AKIO , HAYAMA MASAFUMI
IPC分类号： B25B21/00 , H02N2/00

5. 发明专利

JPH04189221A METHOD FOR SUPPLYING BOX TYPE PRODUCT 失效
公开(公告)号：JPH04189221A
公开(公告)日：1992-07-07
申请号：JP31419190
申请日：1990-11-21
申请人： HITACHI MAXELL
发明人： HAYAMA MASAFUMI , ODA SHINICHIRO
IPC分类号： B65G11/20 , B65G47/08 , B65G47/78 , B65G47/82 , B65G59/06
摘要： PURPOSE:To prevent a danger of generating the damage in the surface by lifting the product, which are piled in a product placing inclined part, up to supply from the upper end to a chute one by one, and making the product to slide for fall with dead-weight thereof to be supplied to a predetermined part. CONSTITUTION:An upper pusher 4 is driven by an upper motor 5 at a relatively high speed to be lifted up, and a thin box case 1 group piled on an upper product placing inclined part 2 is moved from the lower to the upper. When the top thin box case 1 of the lifted-up thin box case 1 group comes to a position corresponding to a position detecting sensor 7, it is detected, and the upper motor 5 is switched to an intermittent drive at a relative low speed. Thereafter, the top thin box case 1 comes to the upper end of the upper product placing inclined part 2 with the timing of a predetermined seconds, and the thin box case 1 is fallen from the upper end to an upper chute 3 one by one with a predetermined interval, and slides to be fallen with a dead-weight thereof on the upper chute 3, a shutter member 22 and a lower chute 13, and is supplied on a belt conveyor 21 one by one.

6. 发明专利

JPH01134729A OPTICAL DISK MASTER BOARD EXPOSING DEVICE 失效
公开(公告)号：JPH01134729A
公开(公告)日：1989-05-26
申请号：JP29055487
申请日：1987-11-19
申请人： HITACHI MAXELL
发明人： YASUI TOSHIAKI , NUNOMURA TOYOYUKI , KANAZAWA YASUNORI , HAYAMA MASAFUMI
IPC分类号： G11B7/085
摘要： PURPOSE:To apply an accurate feeding servo to a laser device for cutting by providing plural lines of light paths for photometry from a laser interference length measuring instrument up to a carriage. CONSTITUTION:The title device is mainly composed of a laser device 4 for cutting mounted on a carriage 3, and a laser interference length measuring instrument 5 to apply the feeding servo to the carriage 3. The laser interference length measuring instrument 5 is equipped with a laser head 21, two external interference instruments 22 and 23, two receivers 24 and 25 and two output devices 26 and 27, and two lines of light paths 28 and 29 for measuring are composed between reflecting mirrors 13 and 14 for measuring and the external interference instruments. Signals outputted from the output devices 26 and 27 are averaged by an arithmetic unit, an error degree due to an oscillation is canceled, and thereby, the accurate feeding servo can be applied to the carriage 3. Thus, a signal pattern without a shape distortion can be exposed to an optical disk master board.

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