公开(公告)号：JPH11308179A

公开(公告)日：1999-11-05

申请号：JP10971198

申请日：1998-04-20

Applicant: SHARP KK

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

IPC: G02B6/122 ,  G02B6/30 ,  G02B6/42 ,  H04B10/00 ,  H04B10/25 ,  H04B10/2581 ,  H04B10/24 ,  H04B10/12 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14

Abstract: PROBLEM TO BE SOLVED: To inexpensively provide a bi-directional optical communication unit to permit stabilized simultaneous optical communication in two directions through the use of one optical fiber, and a bi-directional optical communication equipment using the above unit. SOLUTION: In optical communication modules 21 installed on both ends of one optical fiber 1, transmission light waveguides 4 connected to semiconductor lasers 2 and reception light waveguides 5 connected to photodiodes 3 are optically separated and installed. Transmission light 11 connected to the optical fiber 1 from the transmission light waveguide 4 and the incident area end face 9 of the optical fiber 1, which is irradiated with the transmission light, are installed by inclining the optical axis of transmission light 11 and the normal of the incident area end face 9 so that the reflected light of transmission light 11 on the incident area end face 9 is prevented from being made incident on the photodiode 3 installed on the same side as the semiconductor laser 2.

公开(公告)号：JP2003207695A

公开(公告)日：2003-07-25

申请号：JP2002006532

申请日：2002-01-15

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI ,  ISHII YORISHIGE ,  TAMURA HISAHIRO

IPC: G02B6/42 ,  H01L31/0232

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive, small-sized optical communication module which is capable of full-duplex communication through one optical fiber and has a high S/N. SOLUTION: The light emitted by a light emitting element 4 is converted by a transmitting lens 6, passes through an optical member 10, and coupled with an optical fiber 2. The majority of receive light 22 radiated from the optical fiber 2 is reflected by a receive light reflecting mirror 7 formed on an optical member 10 and converted, and then coupled with a light receiving element 5. The majority it of received light 22 (reception part reflected light 19) irradiates a radio interference prevention part 8 and is reflected (or absorbed) in a direction wherein it is not coupled with the optical fiber 2. Transmission light 21 reflected by an end surface of the optical fiber 2 is reflected by a shading part 9 as a portion of the radio interference prevention part 8 and not coupled with the light receiving element 5. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002323643A

公开(公告)日：2002-11-08

申请号：JP2001125772

申请日：2001-04-24

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI ,  ISHII YORISHIGE ,  TAMURA HISAHIRO

IPC: G02B6/32 ,  G02B6/42 ,  H01L31/0232 ,  H01L33/00 ,  H01L33/48 ,  H01S5/022 ,  H04B10/00 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/2581 ,  H04B10/12 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14 ,  H04B10/24

Abstract: PROBLEM TO BE SOLVED: To provide a inexpensive and compact two-way optical communication device and a two-way optical communication equipment with which the variation of the reception efficiency depending on a transmission distance is decreased, the limitation on the transmission distance is decreased, and a cross talk between transmitting and receiving lights is decreased. SOLUTION: The relation θfb [ n0 Sin(θL+Sin (NA)/n0 +θT)}/ nf -θT, and θfb =Sin [ n0 Sin(θL-Sin (NA)/n0 +θT)}/nf -θT) where θL stands for an angle between the optical axis of the transmission light 8 and the optical axis of the optical fiber 2, θT stands for an angle between the normal line of the end face of the optical fiber 2 at the position S, NA stands for the aperture number before the transmission light 8 is made incident on the optical fiber 2, nf stands for the refractive index of the core of the optical fiber 2, and n0 stands for the refractive index of air.

公开(公告)号：JP2001188148A

公开(公告)日：2001-07-10

申请号：JP37212199

申请日：1999-12-28

Applicant: SHARP KK

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

IPC: G02B6/42 ,  H01L31/0232 ,  H04B10/00 ,  H04B10/114 ,  H04B10/25 ,  H04B10/24

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive and small-sized bi-directional optical communicator and a bi-directional optical communicating device realizing an all double system with a single line of optical fiber ad having a reduced transmission loss both in transmission and reception. SOLUTION: A transmission beam 13 emitted from a light emitting element 4 is converged by a transmission lens 6 and passes through a transmission area 9 of a light separating element 8 to be coupled with the optical fiber 2. A reception beam 15 emitted from the optical fiber 2 is reflected with a curved reflection surface 10 formed on the light separating element 8 surface to be coupled with a light receiving element 4. Part of the transmission beam 13 (reflected transmission beam 14) reflected by he optical fiber 2 passes through the transmission area 9 not to be coupled with the light receiving element 4.

公开(公告)号：JPH1114919A

公开(公告)日：1999-01-22

申请号：JP17077397

申请日：1997-06-26

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI ,  HIRATA SUSUMU ,  ISHII YORISHIGE ,  OGAWA MASARU ,  ABE SHINGO

IPC: G02B26/08 ,  G02B5/10 ,  G02B7/18 ,  G02B26/00 ,  G02B7/185

Abstract: PROBLEM TO BE SOLVED: To provide a deformable mirror which prevents an insulating member from being charged electrostatically and holds the deforming shape of a plastic member with high precision. SOLUTION: The deformable mirror 1 consists roughly of a mirror substrate 2, a reference substrate 3, and a voltage application part 4. Switching between the deformation and nondeformation of the deformable mirror 1 is controlled by a voltage application part 4. When the voltage application part 4 applies an alternating voltage between a flexible member 5 and a counter electrode 8, an electrostatic attractive force is generated between the both and the flexible member 5 is attracted to a reference surface 7 to deform in conformity with the reference surface 7. When the application of the AC voltage by the voltage application part 4 is stopped, no electrostatic attractive force operates between the flexible member 5 and counter electrode 8, so that the flexible member 5 is put back into its initial shape.

公开(公告)号：JPH09211966A

公开(公告)日：1997-08-15

申请号：JP1506296

申请日：1996-01-31

Applicant: SHARP KK

Inventor： AZUMA NOBUYUKI ,  TOYOSHIMA TETSURO ,  IWAMATSU TADASHI ,  FUJITA HIDEAKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To form a uniform thin layer of developer on a developer carrier and to attain sufficient triboelectrification by setting the abutting position of a developer regulating member on the developer carrier, so as to place the center line of the developer regulating member on the upstream side in the rotational direction of the developer carrier. SOLUTION: A developing device is provided with a developing container 8 installed to face an electrostatic latent image carrier 1 and housing a nonmagnetic one-component developer 5, the developer carrier 3 carrying the developer 5, a developer supplying member 4 for supplying the developer 5 to the developer carrier 3 and the developer regulating member 2. This regulating member 2 is arranged to vertically abut on the developer carrier 3 and locate the center line of the regulating member 2 on the upstream side in the rotational direction of the developer carrier 3. Thus, a reservoir part for the developer 5 formed by the developer regulating member 2 and the developer carrier 3 is expanded and the supply of the developer 5 is stabilized.

公开(公告)号：JPH08305075A

公开(公告)日：1996-11-22

申请号：JP944796

申请日：1996-01-23

Applicant: SHARP KK

Inventor： TOYOSHIMA TETSURO ,  FUJITA HIDEAKI ,  IWAMATSU TADASHI ,  AZUMA NOBUYUKI ,  YAMANAKA TAKAYUKI

IPC: G03G9/08 ,  G03G15/08

Abstract: PURPOSE: To provide a toner which can realize stable jet development and to provide a noncontact developing method using this toner by suppressing the intergranular force of a toner to /(2εoεT)}/(εT.g+dt1 ), and Fi is the image force calculated by Fi= (W1 .πd .δ)/(6εoεT)}.(Q/M) . In formula, q is the charge amt. of toner particles to be developed, E is the intensity of the electric field effecting on the toner layer, Q/M is the specific charge of the toner, W1 is the toner amt. separated by development from the toner deposited on the carrying body, εT is the apparent relative dielectric const, of the toner layer P is the toner packing rate, d is the toner particle size, and dt1 is the thickness of the toner layer.

公开(公告)号：JPH08106213A

公开(公告)日：1996-04-23

申请号：JP24284794

申请日：1994-10-06

Applicant: SHARP KK

Inventor： FUJITA HIDEAKI

IPC: G03G15/08

Abstract: PURPOSE: To obtain stable images which are hardly deteriorated with lapse of time by long-term pressurized contact by specifying the compression permanent set of a toner supplying roller consisting of an elastic formed body and the contact depth with a developing roll to a specific relation. CONSTITUTION: This developing device has the developing roller 2 which carries a one-component developer on its surface and transports this developer and the toner supplying roller 3 which comes into contact with the developing roller 2 and supplies the developer to the developing roller 2. The toner supplying roller 3 is produced by forming the elastic formed body of polyurethane, etc., having the number of foamed cells of 95 to 175 pieces/inch, Asker C hardness of 15 to 30 deg. and a foamed cell diameter of 100 to 300μm to a cylindrical form on a conductive shaft consisting of aluminum, etc., and is brought into contact with the developing roller 2 at a contact depth of

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