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81. 发明专利

JPS59149315A Optical apparatus for semiconductor laser 失效
标题翻译：用于半导体激光的光学装置
公开(公告)号：JPS59149315A
公开(公告)日：1984-08-27
申请号：JP2285083
申请日：1983-02-16
申请人： Hitachi Koki Co Ltd , Hitachi Ltd
发明人： TATENO KIMIO , SAITOU SUSUMU , ARIMOTO AKIRA , KATAOKA KEIJI
IPC分类号： G02B5/32 , G02B27/00 , G02B27/09 , G03B42/04
CPC分类号： G02B27/09 , G02B5/32 , G02B19/0014 , G02B19/0052 , G02B27/0025 , G02B27/0944
摘要： PURPOSE: To make a scanning optical system for a laser printer and an optical disk head lightweight and small-sized, by making the beam from a semiconductor laser incident to a hologram lens.
CONSTITUTION: The anisotropic beam from a semiconductor laser 1 is irradiated to a hologram lens 11 obliquely. This beam is diffracted by interference fringes recorded as a hologram and is emitted as an isotropic beam. With respect to the positional relation between the hologram lens and the semiconductor laser, the hologram lens is inclined at an angle θ to the semiconductor laser in a plane including an axis on which the intensity distribution of the semiconductor laser is narrower (normally, in the direction of the junction face). The value of θ is so determined that the emitted beam becomes an isotropic beam.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过使来自半导体激光器的光束入射到全息透镜，使激光打印机和光盘头的扫描光学系统轻便且小型化。构成：来自半导体激光器1的各向异性束倾斜地照射到全息透镜11。该光束被记录为全息图的干涉条纹衍射，并作为各向同性光束发射。关于全息透镜和半导体激光器之间的位置关系，全息透镜在包括半导体激光器的强度分布较窄的轴的平面中与半导体激光器成角度θ倾斜（通常在接合面的方向）。 θ的值被确定为发射的光束成为各向同性光束。

82. 发明专利

JPS5925429B2 JPS5925429B2 - 失效
公开(公告)号：JPS5925429B2
公开(公告)日：1984-06-18
申请号：JP3355674
申请日：1974-03-27
申请人： Hitachi Ltd
发明人： TAKEDA YASUTSUGU , TSUNODA YOSHITO , IMAGAWA FUMIO , KATAOKA KEIJI , TATENO KIMIO
IPC分类号： H04N5/91 , G03H1/00 , G03H1/04 , G03H1/22 , G03H1/26 , G11B7/00 , G11B7/0065 , H04N5/76 , H04N5/89
CPC分类号： G11B7/0065 , G03H1/0236 , G03H1/16 , G03H1/30 , G03H2001/0204 , G03H2210/20 , G03H2230/10 , G03H2270/22 , H04N5/7605 , H04N5/90

83. 发明专利

JPS592242A Optical information reproducer 失效
标题翻译：光信息复制器
公开(公告)号：JPS592242A
公开(公告)日：1984-01-07
申请号：JP8910683
申请日：1983-05-23
申请人： Hitachi Ltd
发明人： KATAOKA KEIJI , YONEZAWA SEIJI
IPC分类号： G02B27/09 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1398
摘要： PURPOSE:To read accurately signals out of the dot information on a disk, by using an optical system which can form a minute circular spot on the disk by means of a semiconductor laser having an emission light distribution of an oval beam pattern. CONSTITUTION:An output angle u2 of a semiconductor lasser given from a light source 1 is set at a value which secures the half value width of a lateral far viewfield image of the semiconductor laser. The emission light distribution is approximately circular within the angle u2 in both longitudinal and lateral directions. Then the light distribution which is made incident to a lens 3 is also circular, and furthermore a stopped-down spot 4 is also circular. With such an optical information reproducer, it is possible to reproduce the dot information from a disk by means of a circular spot as well as a semiconductor laser light source having different longitudinal-lateral ratios of light emitting regions which can obtain a comparatively large optical output. Thus the good reproduced signals are obtained from a disk.
摘要翻译：目的：通过使用能够通过具有椭圆形波束图案的发射光分布的半导体激光器在盘上形成微小圆点的光学系统，准确地读出光盘上的点信息。构成：将从光源1给出的半导体缓冲器的输出角度u2设定为确保半导体激光器的横向远视场图像的半值宽度的值。发射光分布在纵向和横向方向上的角度u2内近似为圆形。然后入射到透镜3的光分布也是圆形的，此外，停止点4也是圆形的。利用这样的光学信息再现器，可以通过圆点再现来自圆盘的点信息，以及具有不同纵向比的发光区域的半导体激光光源，该发光区域可以获得较大的光输出。因此，从盘获得良好的再现信号。

84. 发明专利

JPS58184934A Optical system of multicolor optical scanning 失效
标题翻译：光学光学扫描光学系统
公开(公告)号：JPS58184934A
公开(公告)日：1983-10-28
申请号：JP6731582
申请日：1982-04-23
申请人： Hitachi Koki Co Ltd , Hitachi Ltd
发明人： KATAOKA KEIJI
IPC分类号： H04N1/113 , G02F1/11 , G02F1/33
CPC分类号： G02F1/33
摘要： PURPOSE:To set plural kinds of frequencies so that a laser light consisting of plural kinds of wavelengths is emitted from an acoustooptic modulator at the same angle, by making this laser light incident to the single acoustooptic modulator and allowing the modulator to propagate acoustic waves consisting of plural kinds of frequencies. CONSTITUTION:The laser light emitted from a laser 14 which emits light with plural kinds of wavelengths is inputted to an AO modulator 15. The AO modulator 15 is driven by an AO modulator driving device 16 and emits the laser light consisting of plural kinds of wavelengths at the same angle. Consequently, the laser light consisting of plural kinds of wavelengths is condensed in the same position on a color film 17 by a lens 8. A rotary polyhedral mirror 10 allows the laser light to scan the surface of the film 17, and optical recording is performed on all of the surface of the film when the film is carried.
摘要翻译：目的：设置多种频率，使得由声光调制器以相同的角度发射由多种波长组成的激光，通过使该激光入射到单个声光调制器并允许调制器传播声波的多种频率。构成：从发射具有多种波长的光的激光器14发射的激光被输入到AO调制器15.OA调制器15由AO调制器驱动装置16驱动，并发射由多种波长组成的激光以相同的角度因此，由多种波长组成的激光由透镜8在彩色胶片17上的相同位置处会聚。旋转多面体镜10使激光能够扫描胶片17的表面，进行光学记录当胶片携带时，在膜的所有表面上。

85. 发明专利

JPS5883812A OPTICAL SCANNER 失效
公开(公告)号：JPS5883812A
公开(公告)日：1983-05-19
申请号：JP18109381
申请日：1981-11-13
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KATAOKA KEIJI
IPC分类号： H04N3/02 , G02B26/10 , G02B26/12 , H04N1/113
摘要： PURPOSE:To form a minute light spot without deviation of the position of optical scanning in a wide scanning region on a face to be scanned, by arranging a cylindrical lens, which corrects optically the deviation of the position of optical scanning, between the optical scanner and the face to be scanned. CONSTITUTION:The laser light from a laser light source 1 is reflected by a polarizing beam splitter 5 and is converted to an elliptic beam through a prism 11 and is condensed onto a mirror 3 of a focus controlling element 2 through a lambda/4 plate 12 by a lens 4. The reflected light passes the polarizing beam splitter 5 through the reverse course and becomes an isotropic beam shape shown by an arrow of a broken line. This beam is converted to an elliptic beam (shown by an arrow of a broken line) through two cylindrical lenses 10 arranged in the no- focus type and passes through a lens 6 and an optical scanner 7 and is condensed to a face 8 to be scanned in the direction of the longer axis of the ellipse by a cylindrical lens 9. Consequently, a minute spot without deviation of optical scanning throughout a wide scanning region is obtained.

86. 发明专利

JPS5824119A OPTICAL MODULATING DEVICE 失效
公开(公告)号：JPS5824119A
公开(公告)日：1983-02-14
申请号：JP12818882
申请日：1982-07-21
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KATAOKA KEIJI
IPC分类号： G02F1/11 , G02F1/01
摘要： PURPOSE:To prevent a variation of intensity of separated laser light, by deciding the number of high levels of pulse voltage applied to a pulse modulator, respectively, and varying the pulse voltage in accordance with its deciding output. CONSTITUTION:In accordance with the number of beams of laser light to be separated, magnitude of pulse voltage applied to a pulse modulator is varied. In this case, in accordance with inputs 3a-3c and N1-N3 provided from a logical circuit 12, one of outputs Xi, Yi and Zi (i=1-3) is set to a high level, and others are set to a low level, and are provided to a voltage converting circuit 14, by which corrected pulse outputs 11a, 11b and 11c are sent out and are provided to the pulse modulator. In this case, a variation of intensity of separated laser light can be prevented by deciding the number of high levels of the pulse voltage applied to the pulse modulator, respectively, and varying the voltage in accordance with its deciding output.

87. 发明专利

JPS5814114A HOLOGRAM OPTICAL SCANNER 失效
公开(公告)号：JPS5814114A
公开(公告)日：1983-01-26
申请号：JP11217181
申请日：1981-07-20
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KATAOKA KEIJI
IPC分类号： G02B5/32 , G02B26/10 , G03H1/04
摘要： PURPOSE:To obtain a micro-light spot in a wide scanning area on a screen by disposing a cylindrical lens converging in the hologram displacing direction in reference light in the stage of hologram recording. CONSTITUTION:A hologram scanner is made by interfering object light and reference light which are mutually coherent and recording said light. If illuminating light is irradiated to the hologram and the hologram is moved parallelly by conducting the diffracted light to a screen 2, it is optically scanned in p/f multiplication on the screen. In order to prevent the spread of the light spot owing to astigmatism and curvature of field, cylindrical lenses 9-1, 9-2 are inserted into reference light. At this time, a hologram recording material is placed in the X-Y plane inclusive of an origin O. The lenses 9-1, 9-2 are of an afocal system, and generate the deviation deltax in focus on account of the spherical aberration of the lens 9-1 and therefore it is possible to correct the astigmatism during scanning.

88. 发明专利

JPS5248335A HOLOGRAM PRODUCING METHOD 失效
公开(公告)号：JPS5248335A
公开(公告)日：1977-04-18
申请号：JP12330075
申请日：1975-10-15
申请人： HITACHI LTD
发明人： OSHIDA YOSHISADA , KATAOKA KEIJI , TATENO KIMIO , YAMAGUCHI HIROSHI
IPC分类号： G03H1/00 , G02B5/32
摘要： PURPOSE:To provide a hologram producing method of two stages, by which such holograms are obtained as have a high resolving power and as can produce a number of uniform and bright images.

89. 发明专利

JPS5234753A PHOTOMODULATOR 失效
公开(公告)号：JPS5234753A
公开(公告)日：1977-03-16
申请号：JP11005775
申请日：1975-09-12
申请人： HITACHI LTD
发明人： ARIMOTO AKIRA , SAITOU SUSUMU , HASHIMOTO AKIRA , YAMAMOTO MANABU , KOUMOTO MASATO , KAMIYANAGI KIICHI , KATAOKA KEIJI , MIYAMURA YOSHINORI , SAWANO SUSUMU
IPC分类号： G02F1/01 , G02F1/29 , H04N1/113
摘要： PURPOSE:To draw a figure substantially free from any distortions by applying modulation to signal added to a photomodulator synchronously with the deflection direction of light when drawing said figure on a plane by means of light.

90. 发明专利

JPH10147001A EXPOSURE CONTROL DEVICE AND RECORDING DEVICE EQUIPPED WITH EXPOSURE CONTROL DEVICE 失效
公开(公告)号：JPH10147001A
公开(公告)日：1998-06-02
申请号：JP30796996
申请日：1996-11-19
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KOBAYASHI SHINYA , KATAOKA KEIJI
IPC分类号： B41J2/44
摘要： PROBLEM TO BE SOLVED: To suppress fluctuations of thermal quantity of emitted light of a semiconductor laser and reduce irregularities of a potential. SOLUTION: This exposure control device is equipped with an exposure mode generating device 106 which divides a single line into at least, four exposure modes based on a beam detection signal from a semiconductor laser 302, a logical circuit part for switching the mode which causes the semiconductor laser 302 to emit a light respectively at a first quantity of emitted light, a second quantity of emitted light and a bias quantity of emitted light in response to the exposure mode or sets a drive current to O and a microcomputer 101 which calculates drive current values corresponding to the first quantity of emitted light and the second quantity of emitted light, a quantity of laser emitted light at the characteristic change point of the semiconductor laser 302 and a bias drive current based on the bias luminescent quantity of light. Thus it is possible to suppress the thermal fluctuations of quantity of emitted light of the semiconductor laser 302 and reduce the irregularities of a potential with the help of this exposure control device.

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