公开(公告)号：JPH0676721A

公开(公告)日：1994-03-18

申请号：JP23211492

申请日：1992-08-31

Applicant: SHARP KK

Inventor： HIRATA SUSUMU ,  ISHII YORISHIGE ,  KIMURA KAZUHIRO ,  INUI TETSUYA ,  OTA KENJI

IPC: H01H57/00 ,  B81B3/00

Abstract: PURPOSE:To obtain a miniature relay which is advantageous for assembly since the number of constituent parts is reduced with a piezoelectric element used. CONSTITUTION:Movable sections 11a, 11a... which have movable contacts 12, 12... are provided at the tip of a movable basic board 11. Stationary contacts 22, 22... are so provided as to correspond to the movable contacts 12, 12... in the surface of a glass basic board 21. Since the movable sections 11a are composed of a bimorph type piezoelectric element, a contact may be opened and closed by applying voltage thereto.

公开(公告)号：JP2003174419A

公开(公告)日：2003-06-20

申请号：JP2002134399

申请日：2002-05-09

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI ,  ISHII YORISHIGE ,  TAMURA HISAHIRO

IPC: H04B10/25 ,  G02B6/42 ,  H04B10/2507 ,  H04B10/2581 ,  H04B10/12 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive and simple optical communication system capable of reducing the fluctuation of the quantity of received lights even when a transmission distance is changed, and even when any optical communication module whose communicating speed is different or any optical communication module whose optical characteristics are different coexist. SOLUTION: The numerical aperture of transmitted lights 4 is varied to NAs by a transmitting lens 7. The numerical aperture NAs of the transmitted lights 4 is made larger than the numerical aperture NAp of an optical fiber 2 so that the numerical aperture NAf of received lights 5 radiated from an optical fiber 2 can be made smaller as the transmission distance increases. A receiving optical system is arranged such that the receiving efficiency of the received lights can be increased by the provision of an aperture member 8a according as the numerical aperture NAf is made smaller. Thus, the receiving efficiency when the transmission distance is long can be improved, and the fluctuation of the quantity of the received lights can be reduced even when the transmission distance is varied. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003167166A

公开(公告)日：2003-06-13

申请号：JP2001369494

申请日：2001-12-04

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI ,  ISHII YORISHIGE ,  TAMURA HISAHIRO

IPC: G02B6/42

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive and compact two-way optical communication module in which a single optical fiber is used to realize a fully duplex optical communication and an interference of a transmitting source light and a receiving side light, an interference due to an internal scattered light in particular, is scarce. SOLUTION: A divergence part 25 is formed around the outer periphery of a transmitting lens 6, a thin film reflection mirror 7 which condenses received light 9 is provided, thus the interference due to an internal scattered light is diminished. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003152265A

公开(公告)日：2003-05-23

申请号：JP2001345785

申请日：2001-11-12

Applicant: SHARP KK

Inventor： ISHII YORISHIGE

IPC: H01L31/10 ,  H01S5/026

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor laser module which can obtain a large monitor current and is excellent in terms of productivity and cost efficiency. SOLUTION: A semiconductor laser 3 is mounted on a substrate 2. The substrate 2 has a monitor photodiode 1 having a light receiving surface 5 that is substantially parallel to the perpendiculars to a back surface 3b of the semiconductor laser 3, and the light receiving surface 5 of the monitor photodiode 1 is covered with a light transmitting film 4. Light L2 emitted from the back surface 3b of the semiconductor laser 3 is converged by the light transmitting film 4 and focuses in the monitor photodiode 1.

公开(公告)号：JP2003092552A

公开(公告)日：2003-03-28

申请号：JP2001283602

申请日：2001-09-18

Applicant: SHARP KK

Inventor： ISHII YORISHIGE ,  TAMURA HISAHIRO

IPC: H04B10/00 ,  H04B10/2581 ,  H04B10/22

Abstract: PROBLEM TO BE SOLVED: To effectively use the dynamic range of a receiver by suppressing the variance of optical output due to the variance of an optical fiber length. SOLUTION: In an optical fiber link provided with a light emitting element and a light receiving element and for transmitting and receiving an optical signal between the light emitting element and the light receiving element through an optical fiber, it is possible to suppress the variance of optical output due to the variance of the optical fiber length to effectively use the dynamic range of a receiver by using an optical fiber with a different transmission loss per unit length in each length of the optical fiber (each transmission distance) or in each range of a fixed length of the optical fiber.

公开(公告)号：JP2001324654A

公开(公告)日：2001-11-22

申请号：JP2000140706

申请日：2000-05-12

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI ,  ISHII YORISHIGE ,  TAMURA HISAHIRO ,  KURATA YUKIO

IPC: G02B6/42 ,  G02B6/26 ,  H04B10/071 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/2581 ,  H04B10/80 ,  H04B10/12 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14

Abstract: PROBLEM TO BE SOLVED: To provide the assembling method of a bidirectional optical communication device capable of preventing the crosstalk of a near end reflected light to a received light at the time of performing a bidirectional communication by full-duplex with one optical fiber. SOLUTION: Transmitting lights emitted from a light emitting element 4 are converged with a transmission lens to be coupled with an optical fiber 2. At this time, the transmitted light quantity Ps of a transmitting light to be emitted from the optical fiber 2 and the reflected light quantity Pr of the transmitting light to be made incident on a light receiving element 5 by being reflected on the end face 2a of the fiber 2 are measured. The light emitting element 4 is positioningly adjusted based on the values of the transmitted light quantity Ps and the reflected light quantity Pr. The element 4 is, for example, adjusted at a position where the transmitted light quantity Ps is equal to or larger than a fixed value and, also, the reflected light quantity Pr becomes equal to or smaller than a fixed value. Thus, the crosstalk of the near end reflected light to the received light can be prevented at the time of performing the bidirectional optical communication by full-duplex.

公开(公告)号：JP2001249254A

公开(公告)日：2001-09-14

申请号：JP2000058191

申请日：2000-03-03

Applicant: SHARP KK

Inventor： ISHII YORISHIGE ,  MATSUSHIMA TOSHIYUKI ,  FUJITA HIDEAKI ,  IWAI YOSHIFUMI ,  KURATA YUKIO ,  TAMURA HISAHIRO

IPC: G02B6/42 ,  H01L31/0232 ,  H01S5/022 ,  H04B10/00 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/40 ,  H04B10/50 ,  H04B10/564 ,  H04B10/60 ,  H04B10/67 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28

Abstract: PROBLEM TO BE SOLVED: To provide a one-core full duplex optical communication module that is capable of transmission and reception with one optical fiber, that suppresses near-end reflection return light with a simple structure, that has little loss both in transmission and reception, and that is highly efficiently coupled with a large diameter optical fiber such as POF. SOLUTION: A polarizing film 4 is arranged in the optical path for the reflection return light SR1 of transmission light S1 emitted from a light emitting element 6. The reflection return light SR1 is absorbed in the polarizing film 4 and is not made incident on a light receiving element 7. Signal light R1, which is light emitted from an optical fiber, passes through the polarizing film 4 and is coupled with the light receiving element 7.

公开(公告)号：JP2000098159A

公开(公告)日：2000-04-07

申请号：JP27323998

申请日：1998-09-28

Applicant: SHARP KK

Inventor： ISHII YORISHIGE ,  MATSUSHIMA TOSHIYUKI ,  OKADA NORIAKI ,  FUJITA HIDEAKI ,  KURATA YUKIO ,  TAMURA HISAHIRO

IPC: H01L31/12 ,  G02B6/122 ,  G02B6/42 ,  H01L27/14 ,  H01L27/144 ,  H04B10/00 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H04B10/02 ,  H04B10/28

Abstract: PROBLEM TO BE SOLVED: To improve SN ratio by preventing the interference of transmitting and receiving optical signals at the time of a two-way communication. SOLUTION: This optical transmission/receiver module has a light-emitting element 4 for generating signal light, an optical waveguide 7a for transmission having a core layer 2a for guiding the signal light from the light-emitting element to an optical fiber 3, an over-cladding layer 9a and a buffer layer, a light-receiving element 5 for receiving the signal light and converting it into an electric signal, and an optical waveguide 7b for reception having a core layer 2b for guiding the signal light from the optical fiber to the light-receiving element 5, an ever-cladding layer 9b and a buffer layer 8b on the same substrate 1. These core layers, over-cladding layers and buffer layers for the optical guide 7a and the optical guide 7b are completely optically separated from each other and arranged independently.

公开(公告)号：JPH10133128A

公开(公告)日：1998-05-22

申请号：JP28446696

申请日：1996-10-25

Applicant: SHARP KK

Inventor： ABE SHINGO ,  INUI TETSUYA ,  MATOBA KOJI ,  HIROKANE JUNJI ,  HIRATA SUSUMU ,  ISHII YORISHIGE ,  OKADA NORIAKI ,  FUJITA HIDEAKI

IPC: G02B26/02 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To provide an aperture changeover device favorable for miniaturization of a device and reduction of power consumption, completely cutting off light in an unwanted part, without a loss of light quantity in a necessary part, with a simple structure and assemblage and easy to buid up in a pickup device. SOLUTION: This aperture changeover device comprises an aperture plate 2 and a plurality of opening/closing plates 1. The aperture plate 2 is made of an opaque material and has an aperture 2a of an arbitrary diameter D. The opening/closing plate 1 comprises an opening/closing part 1a, a fixing part 1b for fixing the opening/closing plate 1 to the aperture plate 2 and a hinge 1c for rotatably supporting the opening/closing part 1a. The opening/ closing part 1a is made of an opaque material and a circular opening end 3 is formed at the end part. By fixing plural opening/closing plates 1 to the aperture plate 2, the respective aperture ends 3 from an aperture 3a having an arbitrary diameter (d).

公开(公告)号：JPH09286102A

公开(公告)日：1997-11-04

申请号：JP10282196

申请日：1996-04-24

Applicant: SHARP KK

Inventor： HIRATA SUSUMU ,  MATOBA KOJI ,  ISHII YORISHIGE ,  ABE SHINGO ,  INUI TETSUYA

IPC: B41J2/045 ,  B41J2/16

Abstract: PROBLEM TO BE SOLVED: To provide an ink jet head capable of performing high speed printing an having long life. SOLUTION: An ink jet head 1 is constituted of a diaphragm 2, a nozzle plate 10, nozzles 11 and ink supply ports 12. The diaphragm 2 has piezoelectric members 6 and elastic members 4 and is deformed by the displacement of the piezoelectric member 6 to emit ink 16 from the nozzles 11. The Young's modules Y1 of the elastic members 4 is 150GPa (20