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71. 发明专利

JPH08182059A REMOTE SUPERVISORY EQUIPMENT 失效
公开(公告)号：JPH08182059A
公开(公告)日：1996-07-12
申请号：JP32252194
申请日：1994-12-26
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI
IPC分类号： H04Q9/00
摘要： PURPOSE: To allow a supervisory side to observe an image with excellent image quality by not transferring audio data when data in a recording medium are transferred in the case of fast feed reproduction but by sending data in a format thinning out only image data at a prescribed interval. CONSTITUTION: When a fast feed reproduction request is made from a supervisory side to a supervised side, a recorder 14 in which audio data and image data recorded by the supervised side are recorded is accessed. The supervised side resets the audio mode so as not to transfer the audio data and transfers the image data in the QCIF format where the image data are thinned out at a prescribed interval. When the transmission speed of 48kbps is used for the audio mode, for example, since the data transfer quantity is shared for video signals, a video rate is increased by 60 to 70% in the case of an ISDN line whose transmission speed is 128kbps. As a result, excellent image quality is obtained and a smooth video image as a multiple of four is obtained by the QCIF format.

72. 发明专利

JPH08181977A REMOTE MONITOR 失效
公开(公告)号：JPH08181977A
公开(公告)日：1996-07-12
申请号：JP32252294
申请日：1994-12-26
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI
IPC分类号： H04N7/18 , G08B13/16 , G08B13/196 , G08B25/00
摘要： PURPOSE: To attain remote monitoring with excellent image quality by setting off the transmission audio mode of a monitored device automatically when no audio signal is in existence. CONSTITUTION: A monitored side is provided with a microphone 1, a speaker 2, a monitor 3, and cameras 4-6 picking up an image of the monitored side, and an audio detection circuit 12 detecting an audio level discriminates an audio level from the microphone 1 and informs it to a system control section 11. When no audio signal is in existence, the transmission audio mode is set off and the audio rate is shared for the video signal. Furthermore, when only the video signal is used for monitoring, a data channel is used to send a command to set off the transmission audio mode from a monitor side. A talker detection circuit used for a video conference equipment may be adopted for the audio detection circuit 12.

73. 发明专利

JPH07154766A VIDEO CONFERENCE DEVICE PROVIDED WITH AUTOMATIC ANSWERING FUNCTION 失效
公开(公告)号：JPH07154766A
公开(公告)日：1995-06-16
申请号：JP29782993
申请日：1993-11-29
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI , NOTO HIROSHI
IPC分类号： H04N7/15 , H04M1/65 , H04M11/06
摘要： PURPOSE:To receive a call as an automatic answering message of an opposite party called by a caller even when a telephone call is made during absence by retrieving the relevant automatic answering message stored in advance and transmitting it to the caller when a caller number is received from the caller. CONSTITUTION:When a call comes from the caller, it is transmitted to an opposite side terminal by an ISDN network 6 while adding the caller number. It is detected by a detecting means 3 whether or not a call comes and when the call comes and the opposite side terminal is absent, the received caller number is read for outputting the automatic answering message to that caller. With this caller number as a retrieval key, the previously stored automatic answering message corresponding to that caller number is retrieved by a retrieving means 9. The automatic answering message is read from a video data storage means 7 and a sound data storage means 8 and transmitted through the ISDN network 6 to the caller by an output means 4. Afterwards, the message of the opposite party is sound recorded or video recorded. As a result, even when the opposite party of a telephone is absent, the call can be received as the automatic answering message.

74. 发明专利

JPH0554402A TRACK ACCESSING DEVICE FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0554402A
公开(公告)日：1993-03-05
申请号：JP23730791
申请日：1991-08-23
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI , HIDAKA HIDEKI
IPC分类号： G11B7/00 , G11B7/005 , G11B7/085 , G11B21/08
摘要： PURPOSE:To realize stable seek by executing pre-formatted masking such as a sector mark, etc., to eliminate miscounting tracks at the time of track pulse detection. CONSTITUTION:When a seek instruction is given by a host device, a switch SWI is set to a D/A converter side, and an MPU 10 is set so as not to mask a pre-format masking circuit 17. Then, a target speed data is obtained and an optical head is moved at the target speed. Then, the circuit 17 is made to start operation at the point tens of tracks before the target track and a track pulse TP generates the PF signal which shows the position of a pre-format signal and the PF signal masks the pre-format signal. As a result, stable seek is realized with no miscounting.

75. 发明专利

JP2001111145A WIDE BAND ASE LIGHT SOURCE 失效
公开(公告)号：JP2001111145A
公开(公告)日：2001-04-20
申请号：JP2000154916
申请日：2000-05-25
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI , FURUKATA YUKIKO , TAKEI YUSUKE , OKUDA MICHITAKA
IPC分类号： H01S3/06 , H01S3/094 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To provide a wide band ASE light source which contains 1550 nm band and 1580 mn band, at a high output with a small excitation power. SOLUTION: A reflector 5 and an excitation light source 7 are multiplex- connected to one end of an amplifying optical fiber 3, and also an output terminal and another excitation light source 6 are multiplex-connected to another end, to constitute a wide band ASE light source.

76. 发明专利

JP2000294858A OPTICAL FIBER AMPLIFIER 失效
公开(公告)号：JP2000294858A
公开(公告)日：2000-10-20
申请号：JP9552899
申请日：1999-04-01
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI , TAKEI YUSUKE
IPC分类号： H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/131 , H04B10/07 , H04B10/29 , H04B10/293
摘要： PROBLEM TO BE SOLVED: To maintain constant output even if there is any transient change in input light by exercising such a feedforward control that the values of the output of an input signal light detecting means are added to driving signals for a semiconductor laser for excitation through a feedforward compensator. SOLUTION: Such a feedforward compensation that the values of the output from an input light monitor 15 are added to driving signals for a semiconductor laser 14 for excitation at an adder 10 through a feedforward compensator F(s)17 and response speed is thereby improved. Further, the feedforward compensator F(s)17 has the property of reducing output with an increase of input signal light 1. Since there is inverse relation between the level of input signal light 1 and the driving current of the semiconductor laser 14 for excitation in the ALC and further there is nonlinear relationship wherein saturation occurs when the level of input signal light 1 is increased, feedforward compensation is performed in advance in accordance with the property.

77. 发明专利

JP2000286491A OPTICAL FIBER AMPLIFIER 失效
公开(公告)号：JP2000286491A
公开(公告)日：2000-10-13
申请号：JP9075799
申请日：1999-03-31
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI , TAKEI YUSUKE
IPC分类号： H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H04B10/07 , H04B10/2507 , H04B10/29 , H04B10/296 , H04B10/16 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To improve a transient characteristic by executing feed forward control for adding the output value of an input signal detection means to the driving signal of an excitation semiconductor laser through different feed forward compensators having system characteristics opposite to the amplifying gain characteristic of an amplification optical fiber. SOLUTION: An optical branching unit 20 and an optical branching unit 6 monitor input signal light 1 and output signal light 7. Respective outputs are connected to an input light monitor 8 and an output light monitor 13 and are converted into electric signal. The converted outputs are compared in a comparator 20 and an error signal is divided into tow signals. One controls an excitation semiconductor laser 9 through a phase compensator 16 and a laser driving circuit 10. The other controls an excitation semiconductor laser 11 through a phase compesnator 19 and a laser driving circuit 12. The output of the input light monitor 8 is added to control signals from phase compensators 16 and 18 through F1(s) 14 and F2(s) 17 of feed forward compensators.

78. 发明专利

JP2000223764A OPTICAL FIBER AMPLIFIER 失效
公开(公告)号：JP2000223764A
公开(公告)日：2000-08-11
申请号：JP2442899
申请日：1999-02-01
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI
IPC分类号： H01S3/06 , H01S3/067 , H01S3/10 , H01S3/131 , H04B10/07 , H04B10/29 , H04B10/293
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber amplifier which controls gain to be constant at high speed and permit the control without generating level fluctuation of existing channels, in the case that change of the number of channels is generated which is caused by switchover of optical paths, increase of systems, troubles, etc., in a WDM transmission system. SOLUTION: This optical fiber amplifier is provided with a first feedback loop which so controls quantity of pumping light of a light source for pumping that the output value from an output signal light detecting means follows the output value from an input signal light detecting means, and an observing device 12 which estimates all the input signal light level of input signal light from a driving signal of the light source for pumping and an output value of the output signal light detecting means. In the optical fiber amplifier, a second feedback loop which feedbacks an output of the observing device 12 to the driving signal of the light source for pumping is constituted.

79. 发明专利

JPH11243244A OPTICAL FIBER COUPLER, MANUFACTURE THEREOF AND OPTICAL AMPLIFIER USING THE SAME 失效
公开(公告)号：JPH11243244A
公开(公告)日：1999-09-07
申请号：JP24428598
申请日：1998-08-31
申请人： KYOCERA CORP
发明人： OKUDA MICHITAKA , YASUJIMA HIROMI
IPC分类号： G02B6/287 , G02B6/28 , H01S3/06 , H01S3/094 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To dispense with splicing to simplify manufacturing of an optical fiber coupler, by a method wherein the end surfaces of an optical fiber and a rare earth-added fiber are previously connected by fusion with each other, a plurality of the optical and rare earth-added fibers are prepared, the positions of the connected parts of the optical and rare earth-added fibers by fusion are aligned with each other and the optical and rare earth-added fibers are aligned with each other and are heated, fused and stretched. SOLUTION: A single-mode optical fiber 1 with its protective film peeled at the end surface, and a rare earth-added fiber 4 with a protective film similarly peeled at the end surface, are prepared and a plurality of the fibers 1 and 4 with the end surfaces connected with each other by fusing are prepared. Then, the positions of the parts of the connected parts 2 of the fibers 1 and 4 connected with each other by fusing are aligned with each other and the fibers 1 and 4 are aligned with each other and are heated, fused and stretched. In such a way, an optical fiber coupler is manufactured. That is, the side on one of the sides of a fusion stretched part 3 consists of the normal optical fibers 1 and the other side of the part 3 consists of the fibers 4. As a result, the optical fiber coupler of a structure, wherein the part 3 is located on the sides of the fibers 4 and the parts 2 exist in the vicinity of the part 3, can be obtained. After the fibers 1 and 4 are heated, fused and stretched, the coupler is mounted and fixed on a substrate by prescribed processes.

80. 发明专利

JPH10335725A TEMPERATURE CONTROL CIRCUIT OF SEMICONDUCTOR LASER 失效
公开(公告)号：JPH10335725A
公开(公告)日：1998-12-18
申请号：JP14178297
申请日：1997-05-30
申请人： KYOCERA CORP
发明人： YASUJIMA HIROMI
IPC分类号： H01S5/042 , H01S3/096
摘要： PROBLEM TO BE SOLVED: To enable the temperature of a semiconductor laser to be maintained at a specific value even if the environmental temperature fluctuation is notable by a method wherein the output of the second sensor is added to the inside of a feedback loop as a feed forward signal so as to make the temperature of the semiconductor laser approach to a target temperature. SOLUTION: The temperature of a semiconductor laser 4 detected by a thermistor 5 is compared with the target temperature 1 by a comparator 2 so as to drive a Peltier element 3. At this time, the feedback control is repeated according to the temperature detected by the thermistor 5 to be operated for making the temperature of the thermistor 5 coincide with the target temperature 1. Furthermore, the environmental temperature is detected by an environmental temperature sensor 6 to compare the difference between the target temperature 1 and the environmental temperature by another comparator 7 for adding the difference to an adder 8 thereby enabling the fluctuation in the environmental temperature to be cancelled. Accordingly, even if the environmental temperature is notably fluctuated, the target temperature 1 can be made coincide with the thermistor temperature thereby enabling the precise temperature control to be made feasible.

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