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11. 发明专利

JPS55155324A OPTICAL FIBER DEVICE 失效
公开(公告)号：JPS55155324A
公开(公告)日：1980-12-03
申请号：JP6370779
申请日：1979-05-23
申请人： RICOH KK
发明人： SEGAWA HIDEO , KOYAMA JIROU , NISHIHARA HIROSHI
IPC分类号： G02F1/1339 , G02B6/28 , G02B6/287 , G02F1/11 , G02F1/125 , G02F1/33 , G02F1/335
摘要： PURPOSE:To perform photo branching and photo coupling selectively with high accuracy and make construction simple by bonding two optical fibers at their respective cut faces by way of a bonding layer and providing an ultrasonic wave transducer to part of the bonded layer. CONSTITUTION:The optical fibers 8, 9 which are removed of part of the clads on the lateral side and are polished away of the said portions until the cores of the said portions are slightly cut are bonded to each other at their cut faces A, B by way of an ultrasonic-wave-propagatable bonding layer 10 and an ultrasonic wave transducer 11 is provided to one end of the bonding layer 10. When light P is entered from one end of the fiber 8 and ultrasonic wave signal is fed from the transducer 11 therein by an AC variable electric power source 12, the propagation constant of the light P of the fiber 8 changes. The light P is then transferred to the optical fiber 9. Hence, the degrees of photo branching and photo coupling may be adjusted as desired by changing the propagation constant of the ultrasonic wave signal.

12. 发明专利

JPS5587388A MAGNETIC MEMORY DEVICE 失效
公开(公告)号：JPS5587388A
公开(公告)日：1980-07-02
申请号：JP16267878
申请日：1978-12-26
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： G11B5/02 , G11C13/06
摘要： PURPOSE:To realize the compact structure, high-speed operation and high reliability each for the memory device by using the semiconductor laser oscillator array of direct modulation type to the light source of the laser beam and at the same time covering the memory medium's film surface with the heat absorption layer. CONSTITUTION:Image formation optical system 17 is provided between memory plate 11 and semiconductor laser beam oscillator 10 of direct modulation type; input information S is supplied to the modulation mechanism within oscillator 10 via amplifier 12; and coil 13 which gives start to the environment magnetic field of the medium is attached to the back of plate 11. And substrate 14 of plate 11 contains heat absorption layer 15 and magnetic film 16 coated in the sandwich form. Accordingly, if the beam corresponding to the information irradiated to film 16, the irradiated area of film 16 is heated with increment of the temperature. Thus the heat reception efficiency is increased by layer 15 to perform the writing of the information.

13. 发明专利

JPS5584913A MULTIBEAM LASER RECORDER 失效
公开(公告)号：JPS5584913A
公开(公告)日：1980-06-26
申请号：JP16063778
申请日：1978-12-20
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： G11B7/00 , G02B27/00 , G02F1/11 , G02F1/33 , G03H1/00 , G11B7/0065
摘要： PURPOSE:To prevent density unevenness owing to beat cross modulation and obtain good multibeam laser recorded images by providing variations to the respective frequency intervals of carriers and providing a holocoupler at the deflection angles corresponding to variation amounts. CONSTITUTION:The beams Lb1, Lb2, LB3, LB4 outputted at varying deflection angles from an acoustic element 4 are radiated respectively as reconstruction light to a holocoupler. From the holocoupler 12, such beams LB1, LB2, LB3, LB4 which focus at an equal spacing on a photosensitive drum 10 in correspondence to each beam are emitted. These beams pass through a scanning optical system 14 and is led to the photosensitive drum 10, where they are imaged by leaving a scanning line pitch Pt equally. This constitutuion makes it possible to prevent the cross modulation giving adverse influence to the images, correct the variations of the inter-beam spacings and obtain the recorded images of good quality.

14. 发明专利

JPS5564210A LASER TWOOCOLOR RECORDER 失效
公开(公告)号：JPS5564210A
公开(公告)日：1980-05-14
申请号：JP13689978
申请日：1978-11-07
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： G03G15/01 , G02F1/11 , G02F1/33
摘要： PURPOSE:To simplify the constitution of the laser color recorder by entering two light beams of different wavelengths to one acousto-optic element, modulating two carriers with two color signals respectively and applying the same to the acousto- optic element. CONSTITUTION:Light beams of different wavelengths emitted from lasers 16, 17 are combined to one beam by dichroic mirrors 18, 19 and this beam is entered to an acousto-optic element 20. The carriers from high frequency oscillators 21, 22 are modulated respectively by modulators 23, 24 by the black-and-white signal A and red signal B from a picture signal source and are combined to one with a synthesizer 25. This is then amplified with an amplifier 26 and is applied to the acousto-optic element 20. Here if the carrier frequencies are so selected that the directions theta of the two polarizing beams coincide, then the lasers from the lasers 16, 17 are modulated respectively to the black-and-white signals and red signal by the acousto- optic element 20 and are fetched out through a slit 27. If this way, the constitution of the layer two color recorder may be simplified.

15. 发明专利

JPS54143241A RECORDER 失效
公开(公告)号：JPS54143241A
公开(公告)日：1979-11-08
申请号：JP5122578
申请日：1978-04-28
申请人： RICOH KK
发明人： SEGAWA HIDEO , MORI MASAAKI , HAMAGUCHI IWAO , UMEZAWA MICHIO , SAKURAI KOUICHI
IPC分类号： G02B26/10 , G02F1/33 , H04N1/23
摘要： PURPOSE:To simplify the constitution of the recorder of many resolution point numbers and a wide scanning width by driving an acousto-optic modulator at plural different frequencies and deflecting the modulated light in different directions. CONSTITUTION:The signals of different frequencies outputted by oscillators 9, 10 according to the picture signals corresponding to the front and last halves of images are modulated by modulators 11, 12 and are applied to an acousto-potic light modulator 15 via coupler 13. This causes the primary laser beams modulated according to the front and last half imaged from the leser 16 to be deflected in mutually different directions. These laser beams enter the scanning mirror, etc. 5 at different incident angles via mirrors 18, 20 and simultaneously radiate and scan the front and last halves of a recording photoreceptor 7. Hence, recording of many resolution point numbers and a wide scanning width by the laser beams of narrow scanning angles is accomplished by the simple constitution using one set of light sources and acousto-optic lighr modulator.

16. 发明专利

JPS54126542A COLOR IMAGE RECORDER 失效
公开(公告)号：JPS54126542A
公开(公告)日：1979-10-01
申请号：JP3384578
申请日：1978-03-24
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： B41J2/525 , B41J2/44 , G03G15/04 , H04N1/29
摘要： PURPOSE:To stabilize an image in an image recorder and to simplify a scanning system containing a light modulator, by utilizing laser light and the property of a light modulator. CONSTITUTION:Laser beams oscillated from laser oscillator 10 are sent to AO element 16 of one acousto-optical light modulator (AO light modulator) 15. Each color image signal M, Y, and C modulated with modulator 17a, 17b, and 17c is sent to mixer 18 and combined into one image signal, and applied to AO element 16. As a result, the laser beams incident to element 16 are polarized by polarization angles defined by each carrier frequency f1, f2, and f3 and divided. At the same time, each polarized laser beams are modulated by each image signal, taken out as polarized laser beams 1M, 1Y, and 1C, and converged on photoreceptors 25a, 25b, and 25c. This simple scanning system permits stabilized images to be obtained.

17. 发明专利

JPS5466131A LIGHT SCANNING RECORDER 失效
公开(公告)号：JPS5466131A
公开(公告)日：1979-05-28
申请号：JP13291977
申请日：1977-11-04
申请人： RICOH KK
发明人： HAMAGUCHI IWAO , SEGAWA HIDEO , MORI MASAAKI , UMEZAWA MICHIO , SAKURAI KOUICHI
IPC分类号： B41M5/26 , B41J2/44 , B41M5/00 , G02B26/10 , G02B26/12 , G03B27/32 , G03G15/00 , G03G15/04
摘要： PURPOSE:To attempt the miniaturization and simplification of the structure of a light scanning recorder by using a light source comprising an array of plural semiconductor lasors or light emitting diodes. CONSTITUTION:Photodetector 7 detect laser light to send its signal. By this signal the application of image signal per 4-line the to image signal applying device starts. The image signal of 4-line is converted to photo-signal in which every 1-line is converted by semiconductor lasers 11, 12, 13, 14, and the image signal is converted by the scanning of converged light of the semiconductor laser light to the signal of space arrangement on the surface of photosensitive drum 6. Every time the laser light is swept once by polarizer 3, this process is repeated to form electrostatic latent image of every 4-line on the photosensitive drum 6. Thus the structure of the light scanning recorder can be simplified and miniaturized.

18. 发明专利

JPS5447511A OPTICAL SCAN RECORDER 失效
公开(公告)号：JPS5447511A
公开(公告)日：1979-04-14
申请号：JP11412277
申请日：1977-09-22
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： G02B26/10 , G06K9/00 , G06T1/00 , H01S5/00 , H04N1/113 , H04N1/12
摘要： PURPOSE:To perform the write-out scanning by focusing the output of the luminous element to the sensitizer via the optical fiber bundle, and thus to realize a simple and miniature structure as well as the cost reduction. CONSTITUTION:The light radiated from luminous element 1 according to the picture signal is made parallel and focused through lens system 31 and 32. The light is put into end 51 of optical fiber bundle 5 from deflecting unit 4 possessing rotary multi-phase mirror 41 and reaches along the curvature of the arc end 52 formed linearly to be radiated and then to be focused on the surface of sensitizer drum 7 rotating in the arrow direction via focusing optical transmitter array 6. Thus, the potential is attenuated at the focusing part. Then a write-out scanning is given to sensitizer 7 in accordance with the picture signal equivalent to one line. In this case, the write-out scanning is possible for n-lines simultaneously by securing light emission via different picture signals and using n-units of luminous elements.

19. 发明专利

JPS545752A LIGHT MODULTING ELEMENT DRIVING DEVICE 失效
公开(公告)号：JPS545752A
公开(公告)日：1979-01-17
申请号：JP7075877
申请日：1977-06-15
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： G06K15/12 , G02F1/11 , G06K15/00
摘要： PURPOSE:To increase recording speed when the device is applied to a laser beam printer, etc. and prevent the crosstalks among signal intensities without simultaneously applying plural carriers to a light modulating element by modulating the carrier with plural signals and applying the same to the light modulating element.

20. 发明专利

JPS545735A LASER PRINTER 失效
公开(公告)号：JPS545735A
公开(公告)日：1979-01-17
申请号：JP6996877
申请日：1977-06-15
申请人： RICOH KK
发明人： SEGAWA HIDEO
IPC分类号： G02B26/10 , B41J2/44 , G02F1/29 , G02F1/33 , G03G15/04
摘要： PURPOSE:To increase printing speed by simultaneously light modulating the respective laser beams of plural line signals of character information and simultaneously printing the signals of plural lines.

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