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31. 发明专利

JP2925064B2 失效
公开(公告)号：JP2925064B2
公开(公告)日：1999-07-26
申请号：JP13051694
申请日：1994-06-13
申请人： YAZAKI SOGYO KK
发明人： OGASAWARA YASUYUKI , WATANABE YOSHIHIKO
IPC分类号： G02F1/13 , G02F1/1347 , G02F1/139 , G02F1/21
摘要： A tunable wavelength filter is independent of the polarization. The filter includes first and second liquid crystal layers. Each liquid crystal layer includes two opposing glass substrates on which transparent electrodes, dielectric mirrors and alignment layers are coated in this order, respectively, and a liquid crystal interposed between the opposing alignment layers. In the first liquid crystal layer, the molecule alignment of the liquid crystal is twisted by n pi /2 radian to one twisting direction where n is a positive uneven number. In the second liquid crystal layer, the molecule alignment of the liquid crystal is twisted by -n pi /2 radian to the twisting direction. The first and second crystal layers are laid to overlap each other so that an axis of liquid crystal molecules on the emission side of the first liquid layer is perpendicular to an axis of liquid crystal molecules on the incidence side of the second liquid crystal layer.

32. 发明专利

JPH11101961A OPTICAL MODULATOR AND METHOD OF LIGHT MODULATION 失效
公开(公告)号：JPH11101961A
公开(公告)日：1999-04-13
申请号：JP26241497
申请日：1997-09-26
申请人： FUJITSU LTD
发明人： KIYONO MINORU
IPC分类号： G02F1/03 , G02F1/035 , G02F1/21 , G02F1/225
摘要： PROBLEM TO BE SOLVED: To make it possible to obtain a modulated light signal of a high quenching ratio from such an optical modulator even while it is driven at a low voltage, as is suitable for the use when an optical signal is modulated, for example, in a terminal device of an optical transmission system. SOLUTION: This optical modulator is constituted so that a power branching part 2A for branching incident light into two branch light, a 1st intensity modulating part 3 which performs intensity modulation on one of the branch light branched by the power branching part 2A and outputs an intensity-modulated light signal containing a DC component, an optical phase shifting part 2-3 which performs phase shifting on the optical phase of the other branch light branched by the power branching part 2A so as to be in opposite phase to the above intensity-modulated light signal, and a DC-component suppression part 2B which makes the above intensity-modulated light signal and the phase-shifted light interfere with each other and suppresses the DC component contained in the above intensity-modulated light signal for emitting it.

33. 发明专利

JP2867560B2 失效
公开(公告)号：JP2867560B2
公开(公告)日：1999-03-08
申请号：JP5202290
申请日：1990-03-02
申请人： FUJITSU KK
发明人： KYONO MINORU , MEKATA NAOYUKI , NAKAZAWA TADAO , KUBOTA YOSHINOBU , DOI MASAHARU
IPC分类号： G02B6/12 , G02F1/035 , G02F1/21 , G02F1/225

34. 发明专利

JPH1164896A DIMMING ELEMENT AND DIMMING DEVICE 失效
公开(公告)号：JPH1164896A
公开(公告)日：1999-03-05
申请号：JP22503297
申请日：1997-08-21
申请人： FUJI XEROX CO LTD
发明人： SUZUKI SADAICHI , SAGAWA SHIMIZU , YAMAMOTO SHIGERU , HIKIJI TAKETO , NINOMIYA MASANOBU , BABA KAZUO
IPC分类号： G02F1/21
摘要： PROBLEM TO BE SOLVED: To provide a dimming element with which a reflection type color display device can be provided for changing a display color on one pixel by an external stimulus such as a voltage. SOLUTION: A 1st dielectric layer 31 and a 2nd dielectric layer 32 are alternately laminated over a lot of layers. The 1st dielectric layer 31 is a porous film and has a low refraction factor so as to be elastically deformed by the external stimulus such as a voltage. The 2nd dielectric layer 32 has a high refraction factor so as not to be elastically deformed. When a voltage is impressed between electrodes 12 and 22, the electrodes 12 and 22 are mutually attracted, the 1st dielectric layer 31 is elastically deformed, the thickness of an entire multilayer film 30 is reduced, and the wavelength of interference reflection is shifted shorter.

35. 发明专利

JP2837265B2 失效
公开(公告)号：JP2837265B2
公开(公告)日：1998-12-14
申请号：JP50363590
申请日：1990-02-22
申请人： BURITEITSUSHU TEREKOMYUNIKEESHONZU PLC
发明人： HOWAITOHETSUDO MAAKU
IPC分类号： G02F1/21 , G02F1/015

36. 发明专利

JPH10221670A WAVE LENGTH SELECTING FILTER AND METHOD FOR ADJUSTING RESONANCE WAVE LENGTH USED THEREFOR 失效
公开(公告)号：JPH10221670A
公开(公告)日：1998-08-21
申请号：JP2086197
申请日：1997-02-03
申请人： YAZAKI CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： YAGO SHIGEO , KUDOU TAKEMICHI , WATANABE YOSHIHIKO , HASEGAWA YASUTAKA , KUROKAWA TAKASHI , YOSHIZAWA TETSUO
IPC分类号： G01J3/26 , G02F1/01 , G02F1/13 , G02F1/21
摘要： PROBLEM TO BE SOLVED: To easily re-adjust resonance length at the time of secular change by executing control for generating an on-surface distribution in wave length selection voltage to be impressed on an etalon medium so as to uniform selection wave length in an etalon surface. SOLUTION: A wave length selection filter 10 is an effective component for constituting a wave length multiplex transmission system in an optical communication field. A Fabry-Pe rot etalon-type resonator 20 is a variable wave length filter where the etalon medium 208 provided with a duplex refractivity is used and the refractivity is continuously and electrically controlled. Then, a driving means 30(40 and 50) executes control for generating the on-surface distribution in the wave length selection voltage to be impressed on the etalon medium 208 so as to uniform selection wave length in the etalon surface in accordance with the respective on-surface distributions of resonance length (optical path length nd1) in the optical path A between a pair of refractive index controlling electrodes 204A and 204B which constitute the Fabry-Pe rot etalon-type resonator 20 and resonance length nd2 in the optical path B.

37. 发明专利

JPH10221662A WAVE LENGTH SELECTING FILTER AND RESONANCE WAVE LENGTH SELECTION CONTROL METHOD USED THEREFORE 失效
公开(公告)号：JPH10221662A
公开(公告)日：1998-08-21
申请号：JP2086297
申请日：1997-02-03
申请人： YAZAKI CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： YAGO SHIGEO , NAKADA ATSUSHI , HASEGAWA YASUTAKA , KUROKAWA TAKASHI , YOSHIZAWA TETSUO
IPC分类号： G01J3/26 , G02F1/01 , G02F1/13 , G02F1/21
摘要： PROBLEM TO BE SOLVED: To enable executing incorporating to an optical communication equipment as a module by measuring the electrostatic capacitance of a Fabry-Perot etalon-type resonator in an operation state where a wave length selecting voltage is impressed on an etalon medium between refractive indexs controlling electrodes. SOLUTION: An electrostatic capacitance measuring means 40 measures the electrostatic capacitance Cx of the Fabry-Perot etalon-type resonator 20 in a wave length selecting state where the wave length selecting voltage is impressed on the etalon medium 208 between the refractive index controlling electrodes which form the etalon structure of the Fabry-Perot etalon-type resonator 20. That is, the electrostatic capacitance measuring means 40 is provided with an impedance circuit where a resistance element, a capacitive element and the Fabry-Perot etalon-type resonator 20 are serially connected, a bridge circuit is constituted as against the impedance circuit and the electrostatic capacitance Cx of the Fabry-Perot etalon-type resonator 20 is measured through the use of the bridge circuit in a state where the wave length selecting voltage is impressed on the etalon medium 208 between the refractive index controlling electrodes forming etalon structure with the impedance circuit.

38. 发明专利

JPH10186416A OPTICAL INTERFERENCE DEVICE AND INFORMATION TRANSMITTING DEVICE 失效
公开(公告)号：JPH10186416A
公开(公告)日：1998-07-14
申请号：JP34714096
申请日：1996-12-26
申请人： HITACHI LTD
发明人： OGAWA SUSUMU , PETEC HARUBUOE , NAGANO HISASHI , ALBERT HEBER
IPC分类号： G02F1/21
摘要： PROBLEM TO BE SOLVED: To provide an optical interference device controlling the output wavelength spectrum with an interferometer stably operated at phase level, and an information transmitting device using it. SOLUTION: A femto-second pulse 3 incident on a Mach-Zehnder interferometer 5 is synthesized again after it is divided into two optical paths to be outputted as two complementary output light 7, 7'. The fluctuation of the Mach- Zechnder interferometer 5 is monitored by one output light 7' between two outputs from the interferometer, and thus, by applying feedback to an optical path difference in the interferometer 5, the stable output light 7 at phase level is obtained.

39. 发明专利

JPH1068974A OPTICAL DEVICE 失效
公开(公告)号：JPH1068974A
公开(公告)日：1998-03-10
申请号：JP18085097
申请日：1997-07-07
申请人： LUCENT TECHNOLOGIES INC
发明人： STEIGERWALD MICHAEL LOUIS
IPC分类号： G02F1/15 , G02F1/157 , G02F1/21
摘要： PROBLEM TO BE SOLVED: To provide a device having an optical cavity changeable over from an on state to an off state. SOLUTION: The state of this device is changeable over form the on state to the off state and may thereafter be returned to the off state from the on state. Reduction potential is impressed on the device changed over to the on state. Oxidation potential is impressed on the device changed over to the off state. The device has a high contrast ratio between the on state and the off state and has the optical cavity therein. The optical cavity is a multilayered structural body. The selection of the materials of the plural layers and their thicknesses are so executed that the light reflected from the surfaces between the several surfaces within this multilayered structural body can controllably make interference.

40. 发明专利

JPH1048675A COLOR VARIABLE COLOR FILTER 失效
公开(公告)号：JPH1048675A
公开(公告)日：1998-02-20
申请号：JP20027796
申请日：1996-07-30
申请人： SONY CORP
发明人： UMEYA SHINJIRO
IPC分类号： G02B5/20 , G02F1/133 , G02F1/1335 , G02F1/21
摘要： PROBLEM TO BE SOLVED: To provide a color variable color filter with which the reduction of a production cost is possible and the embodiment of an LCD(liquid crystal display) having high image quality and brightness is possible. SOLUTION: A pair of transparent electrodes 2-1, 2-2 are mounted at a filter body part 1 formed by laminating PLZT layers 10 and ZnO layers 11 and a voltage supplying section 3 is connected to a pair of these transparent electrodes 2-1, 2-2. As a result, the filter body part 1 filters blue light B when voltage is not supplied from this voltage supplying section 3 to a pair of the transparent electrodes 2-1, 2-2. When the voltage of a power source 30 is supplied by turning a switch 32 on, the filter body part 1 filters green light. When the voltage of a power source 31 is supplied by turning the switch 33 on, the filter body part 1 filters red light.

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