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31. 发明专利

JPH11174270A OPTICAL WAVEGUIDE INPUT/OUTPUT DEVICE 失效
公开(公告)号：JPH11174270A
公开(公告)日：1999-07-02
申请号：JP33847697
申请日：1997-12-09
申请人： MINOLTA CO LTD
发明人： NISHIDA NAOKI , YUGAME HIROSHI
IPC分类号： G02B6/34
摘要： PROBLEM TO BE SOLVED: To provide the easily manufacturable optical waveguide input/ output device of high light incidence/emission efficiency and a simple structure provided with a grating coupler. SOLUTION: This device 1 is constituted of a substrate 2, an optical buffer layer 3, an optical waveguide layer 4 and the grating coupler 10 for incidence, etc. The thickness of the optical buffer layer 3 is set so as to match the phases of substrate side emitted light L2 and the waveguide light L1 of incident light L at a position B. The light L made incident on the grating coupler 10 is diffracted and separated into the waveguide light L1 and the substrate side emitted light L2. The substrate side emitted light L2 is reflected at the boundary of the substrate 2 and the optical-buffer layer 3 and made incident on the grating coupler 10 again. The substrate side emitted light L2 is diffracted again by the grating coupler 10 and turned to the waveguide light. At the time, the substrate side emitted light L2 and the waveguide light L1 of the incident light L are optically coupled in the state of intensifying each other.

32. 发明专利

JPH09230154A THIN-FILM OPTICAL WAVEGUIDE 失效
公开(公告)号：JPH09230154A
公开(公告)日：1997-09-05
申请号：JP4096296
申请日：1996-02-28
申请人： MINOLTA CO LTD
发明人： NISHIDA NAOKI
IPC分类号： G02B6/122 , G02F1/335 , H03H9/25
摘要： PROBLEM TO BE SOLVED: To obtain a thin-film optical waveguide with which the output of lights with other higher order modes is suppressed by allowing the guided light of a zero order mode to remain. SOLUTION: The thickness of an optical buffer layer is set at the thickness at which the propagation loss of the guided light of the zero order mode attains =4dB/cm in order to rapidly attenuate the guided light of the higher order mode while allowing the guided light of the zero order mode to remain. The region enclosed by alternate long and short dash lines 11 is the desirable set range of the thickness of the buffer layer when the wavelength of the guided light is 780nm (when a semiconductor laser is used as a light source). The region enclosed by solid lines 12 is the desirable set range of the thickness of the buffer layer when the wavelength of the guided light is 633nm (when an He-Ne laser is used as the light source). Further, the region enclosed by dotted lines 13 is the desirable set range of the thickness of the buffer layer when the wavelength of the guided light is 400nm.

33. 发明专利

JP2001332808A OPTICAL MODULE AND LIGHT SOURCE DEVICE 失效
公开(公告)号：JP2001332808A
公开(公告)日：2001-11-30
申请号：JP2000154097
申请日：2000-05-25
申请人： MINOLTA CO LTD
发明人： NISHIDA NAOKI , HAYAMIZU SHUNICHI
IPC分类号： B41J2/44 , G02B6/122 , H01L31/0232 , H01L31/12 , H01S5/026 , H01S5/0683
摘要： PROBLEM TO BE SOLVED: To provide an optical module and a light source device which can adjust accurately the quantity of light of luminous flux with which a photosensitive body or the like is irradiated, and is capable of miniaturization. SOLUTION: This light source device is provided with waveguides 25, 26, 27 and transmission type photoelectric transducers 41, 42, 43, and outputs of the light sources 21, 22, 23 are changed based on the quantities of lights which are detected by the photoelectric transducers 41, 42, 43. The waveguides introduce incident lights to output surfaces 25b, 26b, 27b which lights are outputted from the light sources 21, 22, 23 and enter from planes 25a, 26a, 27a of incidence. The photoelectric transducers are arranged on the output surfaces 25b, 26b, 27b, transmit luminous fluxes passing the waveguides 25, 26, 27, and detect the quantities of lights of a part of the luminous fluxes.

34. 发明专利

JP2000329956A OPTICAL WAVEGUIDE 失效
公开(公告)号：JP2000329956A
公开(公告)日：2000-11-30
申请号：JP14261199
申请日：1999-05-24
申请人： MINOLTA CO LTD
发明人： MARUYAMA SHINJI , NISHIDA NAOKI
IPC分类号： G02B6/12 , G02B6/122 , G02B6/132 , G02B6/136
摘要： PROBLEM TO BE SOLVED: To obtain emitting light having a nearly gauss shaped profile with little light quantity loss by constituting so that the area of the cross section perpendicular to the central axis is larger in the incident end than in the specified part and the variation of the area of the cross section is gentle. SOLUTION: The waveguide mode in the specified part from the incident ends 11a-13a of respective cores 11-13 to the emitting end is a single mode, the area of the cross section perpendicular to the central axis is larger in the incident ends 11a-13a than in the specified part, and the variation of the area of the cross section is gentle. According to this constitution, since the areas of the incident ends 11a-13a of respective cores 11-13 are widened, a coherent beam is easily made incident within the allowable range of the deviation of an optical axis. Also, since the variation of the area of the cross section of the core is gentle, the possibility of the generation of high order mode exciting is extremely low. Therefore, emitting light having a nearly gauss shaped beam profile with little light quantity loss is obtained.

35. 发明专利

JP2000275458A OPTICAL WAVEGUIDE 失效
公开(公告)号：JP2000275458A
公开(公告)日：2000-10-06
申请号：JP8097299
申请日：1999-03-25
申请人： MINOLTA CO LTD
发明人： NISHIDA NAOKI , HATANO TAKUJI
IPC分类号： G02B6/122 , G02B6/04 , G02B26/10
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide having a multilayer wirings, which can be easily connected to a conventional optical-fiber array. SOLUTION: The lower surface of an optical waveguide film 11 is bonded to the upper surface of an optical waveguide film 12 near their respective light exit sides 11b, 12b to bond the optical waveguide films 11, 12 securely to each other. The optical waveguide films 11, 12 are widened vertically in the cross directions of the films from near the light exit sides 11a, 22a and a spacer 15 is fitted therebetween in a manner widening the space between the optical waveguide films 11, 12.

36. 发明专利

JPH0996842A WAVEGUIDE INPUT/OUTPUT DEVICE 失效
公开(公告)号：JPH0996842A
公开(公告)日：1997-04-08
申请号：JP25261695
申请日：1995-09-29
申请人： MINOLTA CO LTD
发明人： FUKUMOTO SHINJI , NISHIDA NAOKI
IPC分类号： G02F1/33 , G02B6/34 , G02F1/335
摘要： PROBLEM TO BE SOLVED: To provide a waveguide input/output device which is used for an acousto-optic deflection element of a waveguide type and with which the intensity distribution of the exit light of the device attains a gauss distribution exactly in the progression direction of the guided light and in the direction perpendicular to this progression direction. SOLUTION: A thin-film waveguide 2 is provided thereon with a grating 7 for incident and a grating for exit. The height of the grating 7 for incident is constant in the progression direction of the guided light and increases gradually in the progression direction of surface acoustic waves, i.e., in the direction perpendicular to the progression direction of the guided light. The height of the grating for exit increases gradually in the progression direction of the guided light and is constant in the direction perpendicular to the progression direction of the guided light.

37. 发明专利

JPH08184860A OPTICAL BEAM SCANNER 失效
公开(公告)号：JPH08184860A
公开(公告)日：1996-07-16
申请号：JP32879794
申请日：1994-12-28
申请人： MINOLTA CO LTD
发明人： IWAMOTO TSUYOSHI , NISHIDA NAOKI
IPC分类号： G02F1/29
摘要： PURPOSE: To provide an optical beam scanner by a non-mechanical scan system capable of shortening the time required for a scan and realizing multi-valued gradation. CONSTITUTION: This optical beam scanner is constituted of a light source unit 10 generating an optical beam, a non-mechanical light deflection element 3, a convergence optical system 4 and a drive circuit 15. The light source unit 10 is lighted for a period of scan, and the drive circuit 15 outputs a drive signal of a corresponding frequency to the light deflection element 3 only when a surface 20a to be scanned is required to be irradiated by the optical beam based on image information. Further, the output continuous time is controlled based on the gray level of the image.

38. 发明专利

JP2003233023A OPTICAL SWITCH 审中-公开
公开(公告)号：JP2003233023A
公开(公告)日：2003-08-22
申请号：JP2002030777
申请日：2002-02-07
申请人： MINOLTA CO LTD
发明人： NISHIDA NAOKI , SEKINE KOJIRO , SUEYOSHI HIROHISA
IPC分类号： G02B26/08 , G02B6/12 , G02B6/293
摘要： PROBLEM TO BE SOLVED: To provide an optical switch which can separately output wavelength multiplexed light. SOLUTION: A filter 3 in which a plurality of interference filters 3a to 3c are juxtaposed is arranged in a groove 2 intersecting optical waveguides 14a and 14b, and three-phase driving voltage is applied to a plurality of electrodes 4 formed on the surface of a main body part 8. Thus, the filter 3 is moved to a desired position by using an inductive charge type static electricity driving method using electrostatic force generating between the moving piece part 3d of the filter 3 and the electrode 4 working as a stator. COPYRIGHT: (C)2003,JPO

39. 发明专利

JP2002350544A LASER DOPPLER SPEEDOMETER 失效
公开(公告)号：JP2002350544A
公开(公告)日：2002-12-04
申请号：JP2001159959
申请日：2001-05-29
申请人： MINOLTA CO LTD , UNIV TOKAI
发明人： NISHIDA NAOKI , MIKAMI OSAMU , HATANO TAKUJI
IPC分类号： G01P3/36 , G01S17/58 , G02B6/122
摘要： PROBLEM TO BE SOLVED: To provide a laser Doppler speedometer in a self-mixing type for applying laser beams to a target from different directions that can strictly determine the difference in the illumination angle of laser beams to the target and also can be miniaturized. SOLUTION: The optical system of the laser Doppler speedometer is composed of an optical waveguide element having an optical waveguide comprising a laser diode, a photodiode, and a branch section. The optical guide guides laser beams being emitted by the laser diode to the target after division, and guides laser beams that have been scattered by the target to the laser diode. The photodiode detects the intensity of the rear emission laser beam of the laser diode. The intensity of the laser beam being detected by the photodiode includes AC components that vary by a Doppler shift frequency, and the speed of the target is obtained according to the difference in the frequency and the illumination angle of two laser beams to the target.

40. 发明专利

JP2002148461A WAVEGUIDE TYPE MULTI-BEAM LIGHT SOURCE 失效
公开(公告)号：JP2002148461A
公开(公告)日：2002-05-22
申请号：JP2000344639
申请日：2000-11-13
申请人： MINOLTA CO LTD
发明人： NISHIDA NAOKI , TERAMOTO MIYUKI , HATANO TAKUJI
IPC分类号： B41J2/44 , G02B6/126 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a waveguide type multi-beam light source which is provided with an optical waveguide having a function aligning the polarizing directions of exit light from plural exit ends. SOLUTION: The light source is provided with the optical waveguide consisting of plural cores which guide light from the light source to a prescribed position and form plural secondary light sources in the prescribed position and a clad which encircles the core and has a lower refractive index than that of the core. Either one side of light of a TE mode or a TM mode is transmitted more than the other side of light by the core so that the dispersion of the rotation in the polarizing direction of light exited from the core falls within a prescribed angle range.

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