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1. 发明专利

DE69517543D1 未知
公开(公告)号：DE69517543D1
公开(公告)日：2000-07-27
申请号：DE69517543
申请日：1995-03-15
申请人： HITACHI LTD
发明人： SUGITA TATSUYA , ARIMOTO AKIRA , MITSUYA TERUAKI , HOSHI NOBUYOSHI , OKANO MAMORU , ONOSE ATSUSHI , TSUNODA YOSHITO , KOBAYASHI SHINYA , MARUO SEIJI , TAKUMA YASUO
IPC分类号： G03G15/34
摘要： The present invention provides a high-speed image forming method and apparatus capable of directly controlling a toner by the force of an energy beam. Selected toner particles 101 in a mass of toner adhering to the surface of a transparent drum 221 are irradiated with a laser beam 81 emitted by a laser disposed within the transparent drum and controlled for scanning according to image information. The laser beam separates the selected toner particles from the transparent drum by the force it produces on the particles, and then the separated toner particles are moved to a paper sheet 150 by the force of an electric field produced by a developing electrode. Each toner particle need only be irradiated with the light for a comparatively short period of time, so that an image can be formed at high speed.

2. 发明专利

DE3804452A1 未知
公开(公告)号：DE3804452A1
公开(公告)日：1988-08-25
申请号：DE3804452
申请日：1988-02-12
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ARIMOTO AKIRA , OJIMA MASAHIRO , SAITO SUSUMU
IPC分类号： H01S5/042 , G06K15/12 , G11B7/125 , G11B7/1263 , H01S5/068 , H01S5/0683 , H01S5/40 , H01S3/133 , G05D25/00 , H01L27/15 , H01S3/23

3. 发明专利

DE3722085A1 未知
公开(公告)号：DE3722085A1
公开(公告)日：1988-02-25
申请号：DE3722085
申请日：1987-07-03
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MOCHIZUKI TAKESHI , ARIMOTO AKIRA , SAITO SUSUMU
IPC分类号： G02B26/10 , G01B11/00 , G02B26/08 , G06K15/12 , H04N1/047 , H04N1/113 , H04N1/12 , H04N1/19 , G02B27/14 , G05D3/12

4. 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.

5. 发明专利

DE3543472A1 Laser printer 未知
公开(公告)号：DE3543472A1
公开(公告)日：1986-06-12
申请号：DE3543472
申请日：1985-12-09
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ARIMOTO AKIRA , SAITOH SUSUMU
IPC分类号： G02B26/10 , G06K15/12 , H04N1/113 , B41J3/21
摘要： In the case of a laser printer in which a photoconductive drum is scanned by a plurality of light beams, the respective light beams are arranged such that their light spots do not overlap one another on a light detector, the detector signals corresponding to the respective beams in each case being recorded separately in terms of time, and the start of the information printing being controlled by the detector output signals and the scanning beams coinciding with one another, and the printing process being carried out as a result.

6. 发明专利

DE3903586C2 未知
公开(公告)号：DE3903586C2
公开(公告)日：1995-02-09
申请号：DE3903586
申请日：1989-02-07
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ARIMOTO AKIRA , SAITO SUSUMU , TSUJI YASUYUKI , NAMIKAWA OSAMU , MOCHIZUKI TAKESHI
IPC分类号： B41J2/44 , G06K15/12 , B41J2/455 , H01S3/10 , G05D25/00
摘要： Electric-photosensitive printing is accomplished with an LD providing a laser scanning beam that is modulated to affect printing, and the power output of the LED is maintained constant through negative feedback by a holding voltage provided by a capacitor having its charge determined only during a non-printing portion of the printing period wherein a plurality of sheets are printed. During the non-printing period, contact of the scanning laser beam with the electro-photosensitive material is disabled while the laser beam is maintained on so that its power may be measured and compared with a reference level to provide a feedback signal for controlling the output of the laser beam, particularly the feedback signal being provided to the holding capacitor only during the non-printing portion of the period, and the holding capacitor being isolated from the feedback signal during the printing portion of the period. As a specific embodiment, a rectangular sheet of electric-photosensitive material is replaceable wound around a drum so that its opposite ends are spaced apart to provide a seam to affect the disablement of the laser beam from contracting the electro-photosensitive material during the non-printing portion of the period, and a separate light source used to detect this seam portion to determine the non-printing portion of the period.

7. 发明专利

DE3851250T2 未知
公开(公告)号：DE3851250T2
公开(公告)日：1994-12-15
申请号：DE3851250
申请日：1988-04-06
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MOCHIZUKI TAKESHI , ARIMOTO AKIRA , SAITO SUSUMU
IPC分类号： B41J2/47 , G02B13/00 , G02B26/10 , G02B26/12 , G02B27/00 , H04N1/04
摘要： In an optical scanning apparatus, a scanning lens (1) is composed of three lens elements. The centrally located lens element of the scanning lens (1) has a refractive power in the direction (y) for correcting the surface tilt, that is an inverted number of a focal length that is changed in accordance with the scanning view angle, whereby curvature of field is well corrected and RMS spot diameters on the scanning surface (17) may be small. In addition, even if the view angle is increased, imaging characteristics may be kept at a high resolving power.

8. 发明专利

DE3851250D1 未知
公开(公告)号：DE3851250D1
公开(公告)日：1994-10-06
申请号：DE3851250
申请日：1988-04-06
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MOCHIZUKI TAKESHI , ARIMOTO AKIRA , SAITO SUSUMU
IPC分类号： B41J2/47 , G02B13/00 , G02B26/10 , G02B26/12 , G02B27/00 , H04N1/04
摘要： In an optical scanning apparatus, a scanning lens (1) is composed of three lens elements. The centrally located lens element of the scanning lens (1) has a refractive power in the direction (y) for correcting the surface tilt, that is an inverted number of a focal length that is changed in accordance with the scanning view angle, whereby curvature of field is well corrected and RMS spot diameters on the scanning surface (17) may be small. In addition, even if the view angle is increased, imaging characteristics may be kept at a high resolving power.

9. 发明专利

DE3804452C2 未知
公开(公告)号：DE3804452C2
公开(公告)日：1994-05-19
申请号：DE3804452
申请日：1988-02-12
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ARIMOTO AKIRA , OJIMA MASAHIRO , SAITO SUSUMU
IPC分类号： H01S5/042 , G06K15/12 , G11B7/125 , G11B7/1263 , H01S5/068 , H01S5/0683 , H01S5/40

10. 发明专利

DE4100150A1 未知
公开(公告)号：DE4100150A1
公开(公告)日：1991-08-14
申请号：DE4100150
申请日：1991-01-04
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： OHSHIMA MINORU , MORIO SHUICHI , SAITOH SUSUMU , NAMIKAWA OSAMU , OBARA KAZUTOSHI , SEINO MINORU , MOCHIZUKI TAKESHI , NAKURA MAKOTO , ARIMOTO AKIRA , KASAI MASUO
IPC分类号： G02B26/10 , B41J2/44 , G02B26/08 , G02B26/12 , H04N1/047 , H04N1/113 , H04N1/12 , H04N1/19
摘要： A beam position control apparatus in which a light beam is led into a light detector from a light generating source through a movable reflector and positioning of the light beam is performed by a servo control circuit for feeding a signal from the light detector back to the movable reflector, comprises: an oscillator for oscillating in response to an initializing signal and moving the movable reflector to move the beam onto the light detector; and a control switch for separating the oscillator and the movable reflector from each other in response to the signal from the light detector, the oscillator and the control switch being arranged in the servo control circuit.

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