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1. 发明专利

DE3609657A1 未知
公开(公告)号：DE3609657A1
公开(公告)日：1986-10-02
申请号：DE3609657
申请日：1986-03-21
申请人： HITACHI LTD
发明人： NAKAMURA SHIGERU , TAKAHASHI SADAO , WATANABE MASATERU , ARIMOTO AKIRA
IPC分类号： G02B5/04 , G02B27/09 , G11B7/135 , G02B27/00
摘要： Prism optics for changing the shape of a light beam, including a composite prism consisting of at least two types of prisms made of materials having different variations in the refractive index due to variations of the refractive index due to wavelength variations and to temperature variations, which materials are so chosen that the angle of the light beam exitting from the prism optics remains almost constant, independent of variations in the wavelength of the light beam and temperature, and an optical information processing apparatus using these prism optics.

2. 发明专利

DE3604722A1 未知
公开(公告)号：DE3604722A1
公开(公告)日：1986-09-11
申请号：DE3604722
申请日：1986-02-14
申请人： HITACHI LTD
发明人： NAKAMURA SHIGERU , KAMISADA TOSHIMASA , SAITO AKIRA , MAEDA TAKESHI , TSUNODA YOSHITO , KAKU TOSHIMITSU , KATO TUYOSHI , HISHIKI MASAAKI , WATANABE MASATERU
IPC分类号： G11B7/09 , G11B11/105 , G02B7/11 , G11B7/135
摘要： A focus error detection apparatus and an optical disk apparatus comprising a focusing lens for focusing reflected light coming from a light reflecting surface which is to be adjusted at the focal point of a projected light beam; a beam splitter means for dividing the output light of said focusing lens into a first and a second focused light beam; a first and a second photo-detector disposed respectively on the optical paths of said first and said second focused light beam, one of which is located behind the convergence point of said first focused light beam and the other of which is located before the convergence point of said second focused light beam, each of them generating outputs proportional to the amount of light within a predetermined region of the received light image, when it varies so that it is enlarged; and a circuit generating a focus error signal by using the difference between the outputs of said two photo-detectors.

3. 发明专利

JPH0210491B2 失效
公开(公告)号：JPH0210491B2
公开(公告)日：1990-03-08
申请号：JP14291080
申请日：1980-10-15
申请人： HITACHI LTD
发明人： MYAUCHI TOSHIMITSU , YONEZAWA SEIJI , SUGYAMA TOSHIO , WATANABE MASATERU
IPC分类号： G11B7/09 , G11B7/135

4. 发明专利

JPS6348089B2 失效
公开(公告)号：JPS6348089B2
公开(公告)日：1988-09-27
申请号：JP22377182
申请日：1982-12-22
申请人： HITACHI LTD
发明人： TAJIMA FUJIO , HIRAI HIROTAKE , TANAKA KATSUYUKI , WATANABE MASATERU
IPC分类号： G11B15/43 , B65H23/04 , B65H23/16 , G11B15/56

5. 发明专利

JPS63133341A AUTOMATIC LOADING MECHANISM FOR CARTRIDGE 失效
公开(公告)号：JPS63133341A
公开(公告)日：1988-06-06
申请号：JP27883186
申请日：1986-11-25
申请人： HITACHI LTD
发明人： HATTORI TOSHIYASU , WATANABE MASATERU
IPC分类号： G11B17/26 , G11B15/68
摘要： PURPOSE:To execute a changing work at a high speed by taking out a cartridge from a reproducing part by a carrying part and carrying it temporarily to a temporary storage case, taking out the next cartridge from the storage case and installing it, at the time of changing the cartridge. CONSTITUTION:In a storage case 11 of an automatic cartridge loading mechanism, a temporary storage case 13 is provided in the vicinity of a recording and reproducing part 12. At the time of changing a cartridge 10, a changing control means 15 controls a carrying part 14, by which first of all, the cartridge 10 of the reproducing part 12 is taken out and carried temporarily to the temporary storage case 13. Subsequently, the next cartridge 10 to be changed is taken out of the storage case 11 and installed to the reproducing part 12, and reproduction is executed. Accordingly, comparing with a system for returning that which has been taken out of the conventional reproducing part 12 to the regular storage case 11, the time required for reproduction can be shortened, and the changing work can be executed at a high speed.

6. 发明专利

JPS631666B2 失效
公开(公告)号：JPS631666B2
公开(公告)日：1988-01-13
申请号：JP7776980
申请日：1980-06-11
申请人： HITACHI LTD
发明人： KITAOKA YOSHIDAI , WATANABE MASATERU , ABE SHINICHI
IPC分类号： G11B27/10 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/013 , G11B20/12 , G11B20/18

7. 发明专利

JPS62267984A OPTICAL DISK CARTRIDGE 失效
公开(公告)号：JPS62267984A
公开(公告)日：1987-11-20
申请号：JP11081886
申请日：1986-05-16
申请人： HITACHI LTD , HITACHI ELECTR ENG
发明人： HATTORI TOSHIYASU , SAITO AKIRA , WATANABE MASATERU , NAKAGAWA MASATOSHI
IPC分类号： G11B23/03
摘要： PURPOSE:To enable a cartridge to be taken out while a disk is rotating, to improve operability, and to reduce the access time of an automatic loading mechanism, by providing a brake part in the cartridge, and using the brake part also as a cleaner. CONSTITUTION:At the R/W area of a disk 2 in the inner side of a cartridge 1, a cleaner member 3 is mounted, and at inner and outer peripheries other than the R/W area, brake materials 4 are mounted. When the cartridge 1 is ejected, an operator depresses an eject switch 8 at the front of a device. Then, a loading mechanism is operated, and the cartridge 1 can be taken out from the device. At such a time, the disk 2 is rotated in the cartridge 1, but, when the cartridge 1 is raised upward, the disk 2 is stopped due to friction with the brake materials 4 of the inner and outer peripheries, and the R/W area part is cleaned up at this time by the cleaner member 3.

8. 发明专利

JPS61224144A FOCUS ERROR DETECTOR 失效
公开(公告)号：JPS61224144A
公开(公告)日：1986-10-04
申请号：JP6357885
申请日：1985-03-29
申请人： HITACHI LTD
发明人： KAMISADA TOSHIMASA , HISHIKI MASAAKI , SAITO AKIRA , WATANABE MASATERU
IPC分类号： G02B7/28 , G11B7/09
摘要： PURPOSE:To obtain a focus error detection signal with less effect by a change in a reflected light due to the shape change in the reflected plane by arranging each photodetector on each optical path in a positional relation where the size change in the focus photodetection image appears oppositely each other attended with out of focus. CONSTITUTION:The reflected light 2 focused by a condenser lens 3 is divided into two by a beam splitter 10 and a straight light 2A and a branched light 2B form focal points P1, P2 at an equal position from a branched face 10' respectively. In this case, two photodetectors 13, 14 are used, one photodetector 13 is arranged to a position near the beam splitter by a prescribed distance (w) from the focal point P2 and the other photodetector is arranged at a position parted from the focal point P1 by a distance (w) and the beam splitter output light is received at a respective position. Thus, the differential output V of the photodetectors 13 and 14 shows an S-shaped characteristic curve to the deviation delta of focal point to constitute an automatic focus servo system.

9. 发明专利

JPS6177148A Light source device having reduced angle deviation of outgoing light with temperature 失效
标题翻译：具有温度降低角度变化的光源装置
公开(公告)号：JPS6177148A
公开(公告)日：1986-04-19
申请号：JP19852384
申请日：1984-09-25
申请人： Hitachi Ltd
发明人： KURIBAYASHI AKIRA , WATANABE MASATERU , KANEDA NORIYA , MAEKAWA HIDEO , KUZE TSUTOMU , TAKAHASHI SADAO
IPC分类号： G02B7/00 , G11B7/08 , G11B7/12 , G11B7/125
CPC分类号： G11B7/08 , G11B7/125
摘要： PURPOSE:To control the relative deviation between a light source and a lens in a direction perpendicular to the lens optical axis and to obtain stability with respect to temperature by providing a lens holder or light source holder with a mechanism which absorbs elastically heat stress due to the difference in coefficient of thermal expansion between both holders. CONSTITUTION:A light source holding part 3 where a semiconductor 1 is fixed to a coupling member 4 by shrinkage fitting, and the coupling member 4 is clamped threadably to the lens holder 5. The focal length of a coupling lens 2 varies with temperature, so the coupling member 4 and lens holder 5 are made of metals having different coefficients of thermal expansion in such a temperature compensating structure that the light emission point of the semiconductor laser 1 is fixed at the focal length position of the coupling lens 2 according to variation in the focal length. The engagement part between the light source holding part 3 and coupling member 4 is cylindrical, so isotropy is obtained against temperature variation. Consequently, motion in the same surface of the semiconductor laser 1 is only motion depending upon the unbalance of the cylindrical engagement part and suppressed small, thereby obtaining stability as to temperature.
摘要翻译：目的：为了在与透镜光轴垂直的方向上控制光源与透镜之间的相对偏离，并通过提供具有吸收弹性热应力的机构来获得相对于温度的稳定性两者之间热膨胀系数的差异。构成：通过收缩配合将半导体1固定在耦合构件4上的光源保持部3，将连结构件4螺纹地夹持在透镜保持件5上。耦合透镜2的焦距随温度而变化，因此在这样的温度补偿结构中，耦合构件4和透镜保持器5由具有不同热膨胀系数的金属制成，使得半导体激光器1的发光点根据变化在固定在耦合透镜2的焦距位置焦距。光源保持部3与耦合部件4之间的接合部是圆筒形的，因此能够抵抗温度变化而获得各向同性。因此，半导体激光器1的同一表面的运动仅依靠圆筒形卡合部的不平衡运动而被抑制得较小，从而获得了对温度的稳定性。

10. 发明专利

JPS59116951A Actuator buffer type tape feeding device 失效
标题翻译：执行器缓冲器类型带进给装置
公开(公告)号：JPS59116951A
公开(公告)日：1984-07-06
申请号：JP22377182
申请日：1982-12-22
申请人： Hitachi Ltd
发明人： TAJIMA FUJIO , HIRAI HIROTAKE , TANAKA KATSUYUKI , WATANABE MASATERU
IPC分类号： G11B15/43 , B65H23/04 , B65H23/16 , G11B15/56
CPC分类号： G11B15/56
摘要： PURPOSE:To execute the start stop operation of a tape a high speed by operating directly a tension on a tape by a freely rotatable idler, and equalizing the operated tension extending over a buffer section. CONSTITUTION:A steel wire 30 is wound and extended between rotating pulleys 31, 33. This wire 30 is coupled with a carriage 22. Therefore, a rotational torque of the rotating pulley 31 is propagated as a force in the linear direction to the carriage 22 by the steel wire 30. The rotating pulley 33 is constituted so to be movable, and constituted so that a tension of the steel wire, etc. can be adjusted, in order to propagate exactly the rotational torque of the rotating pulley 31 to the carriage 22. In order to operate a constant force on an idler 7a, an electric current applied to an actuator motor 32 is supplied from a power source circuit 24.
摘要翻译：目的：通过自由旋转的惰轮直接操作带子上的张力，并通过缓冲区域上延伸的操作张力平衡来高速执行磁带的起动停止操作。构成：钢丝30缠绕并延伸在旋转的皮带轮31,33之间。该导线30与滑架22联接。因此，旋转皮带轮31的旋转扭矩作为向滑架22的直线方向的力传播旋转皮带轮33被构造成能够移动，并且构成为能够调整钢丝等的张力，以将旋转滑轮31的旋转扭矩精确地传播到滑架为了在惰轮7a上操作恒定的力，施加到致动器电动机32的电流从电源电路24供给。

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