公开(公告)号：DE69830153T2

公开(公告)日：2005-10-13

申请号：DE69830153

申请日：1998-11-27

Applicant: SEIKO EPSON CORP

Inventor： TAKEDA TAKASHI ,  YONEKUBO MASATOSHI ,  ITO HIROKAZU ,  KAMIJIMA SHUNJI

IPC: G02B26/08 ,  G09G3/34 ,  G09F9/30 ,  G02B26/02 ,  G09F9/37

Abstract: An optical switching device comprises: a light guide including a total reflection plane capable of totally reflecting light thereby transmitting the light; a switching part capable of, at a position where its extraction plane is in close contact with the total reflection plane, capturing evanescent light and reflecting the captured light thereby outputting it; and a driving part for driving the optical switching part. The light guide, the switching part, and the driving part are laminated in this order into a multilayer structure. The employment of the multilayer structure makes it possible to optimize the respective layers independently of one another. The extracted light does not pass through the driving part. This allows the driving part to be optimized so as to achieve an optical switching device capable of operating at a high speed with low power consumption. Thus, it is possible to provide a low-loss and high-contrast optical switching device using an evanescent wave, which can respond at a high speed.

公开(公告)号：DE69830153D1

公开(公告)日：2005-06-16

申请号：DE69830153

申请日：1998-11-27

Applicant: SEIKO EPSON CORP

Inventor： TAKEDA TAKASHI ,  YONEKUBO MASATOSHI ,  ITO HIROKAZU ,  KAMIJIMA SHUNJI

IPC: G02B26/08 ,  G09G3/34 ,  G09F9/30 ,  G02B26/02 ,  G09F9/37

Abstract: An optical switching device comprises: a light guide including a total reflection plane capable of totally reflecting light thereby transmitting the light; a switching part capable of, at a position where its extraction plane is in close contact with the total reflection plane, capturing evanescent light and reflecting the captured light thereby outputting it; and a driving part for driving the optical switching part. The light guide, the switching part, and the driving part are laminated in this order into a multilayer structure. The employment of the multilayer structure makes it possible to optimize the respective layers independently of one another. The extracted light does not pass through the driving part. This allows the driving part to be optimized so as to achieve an optical switching device capable of operating at a high speed with low power consumption. Thus, it is possible to provide a low-loss and high-contrast optical switching device using an evanescent wave, which can respond at a high speed.

公开(公告)号：DE69726527T2

公开(公告)日：2004-09-23

申请号：DE69726527

申请日：1997-03-10

Applicant: SEIKO EPSON CORP

Inventor： YONEKUBO MASATOSHI ,  ARIMURA TOSHIO ,  MIYAZAWA TAKAO

IPC: G11B7/00 ,  G11B7/005 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B20/10 ,  G11B7/09 ,  G11B7/125

Abstract: By using a semiconductor laser of a relatively long wavelength relative to the track pitch of an optical recording medium, and the optical super-resolution technique, there are provided an optical head and an optical recording apparatus which permit processing such as recording and regeneration onto and from a conventional CD-R with not problem, and processing of an optical recording medium of the DVD standard coping with a high recording density. In the optical head and the optical recording apparatus of the present invention, a semiconductor laser having a relatively long wavelength relative to the track pitch of an optical recording medium can be used. The invention therefore provides an optical head and an optical recording apparatus which overcome the limit on efforts toward a higher density, permit recording and regeneration at a high recording density at a low cost with a high reliability. The invention provides also an optical head and an optical recording apparatus capable of coping with the tendency toward a further higher density in the future.

公开(公告)号：DE69119658D1

公开(公告)日：1996-06-27

申请号：DE69119658

申请日：1991-07-10

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  YONEKUBO MASATOSHI ,  IWANO HIDEAKI ,  SAKATA HIDEFUMI ,  TAKEDA TAKASHI ,  SEKI TETSUYA ,  KOGURE SHIGERU

IPC: G11B7/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105

Abstract: A small and inexpensive optical head for detecting a recorded signal, a focusing error signal and a tracking error signal, and an optical memory device utilizing the optical head. A diffraction device (103) is provided having two chirped grating regions (103A, 103B) for dividing a light beam from an optical recording medium (105) and directing the divided beams toward four band-shaped photoelectric transducers (106) and an astigmatism generator formed by the diffraction means (103) and a positive lens (102). The four photoelectric transducers are positioned in a plane inclined with respect to the optical axis of zero-order diffraction light, and the longitudinal axes of each of the band-shaped photoelectric transducers are radially arranged relative to the optical axis.

公开(公告)号：DE60318145T2

公开(公告)日：2008-12-24

申请号：DE60318145

申请日：2003-03-10

Applicant: SEIKO EPSON CORP

Inventor： SEKI HIDEYA ,  YONEKUBO MASATOSHI

IPC: B41J2/45

Abstract: The present invention relates to a small optical writing head, such as an organic EL array exposure head, having long work distance with little crosstalk, a method of manufacturing the same, and an image forming apparatus using the same. The optical writing head is an optical writing head which projects fluxes of modulated light from light-emitting parts 2 of a light-emitting element array such as an organic EL array or fluxes of modulated light transmitted through shutter parts 2 of an optical shutter element array onto an image carrier 11 to form a predetermined pattern on the image carrier 11. The optical writing head comprises ball lenses 10 which are arranged such that the alignment of the ball lenses 10 corresponds to the alignment of the light-emitting parts 2 of the light-emitting element array or the shutter parts 2 of the optical shutter element array.

公开(公告)号：DE69936041T2

公开(公告)日：2007-09-13

申请号：DE69936041

申请日：1999-10-13

Applicant: SEIKO EPSON CORP

Inventor： KAMIJIMA SHUNJI ,  YONEKUBO MASATOSHI ,  TAKEDA TAKASHI ,  NISHIKAWA TAKAO

IPC: B81B1/00 ,  B81B3/00 ,  B81C1/00 ,  G02B26/02

Abstract: A micromachine and a manufacturing method according to the present invention are suitable for a micromachine that has a dynamic first microstructured portion serving as a drive portion, and a static second microstructured portion adapted to perform a switching function and functions to be performed as an optical element. The second microstructured portion can be manufactured at least without complex steps, such as a silicon process, by forming a static second microstructure on the dynamic first microstructured portion or in such a way as to be overlaid thereon by mold transfer. Thus, the microstructured portion of a complex shape can be easily formed with good reproducibility. This contributes to increased productivity thereof. Especially, when a plurality of elements are arranged in an array, similarly as in the case of a spatial light modulator, the stable reproduction thereof is achieved by the mold transfer. Thus, as compared with the case of manufacturing all elements in a silicon process, the probability of an occurrence of a defect is very low. Consequently, this contributes to improved yield of micromachines.

公开(公告)号：DE69936041D1

公开(公告)日：2007-06-21

申请号：DE69936041

申请日：1999-10-13

Applicant: SEIKO EPSON CORP

Inventor： KAMIJIMA SHUNJI ,  YONEKUBO MASATOSHI ,  TAKEDA TAKASHI ,  NISHIKAWA TAKAO

IPC: B81B1/00 ,  B81B3/00 ,  B81C1/00 ,  G02B26/02

Abstract: A micromachine and a manufacturing method according to the present invention are suitable for a micromachine that has a dynamic first microstructured portion serving as a drive portion, and a static second microstructured portion adapted to perform a switching function and functions to be performed as an optical element. The second microstructured portion can be manufactured at least without complex steps, such as a silicon process, by forming a static second microstructure on the dynamic first microstructured portion or in such a way as to be overlaid thereon by mold transfer. Thus, the microstructured portion of a complex shape can be easily formed with good reproducibility. This contributes to increased productivity thereof. Especially, when a plurality of elements are arranged in an array, similarly as in the case of a spatial light modulator, the stable reproduction thereof is achieved by the mold transfer. Thus, as compared with the case of manufacturing all elements in a silicon process, the probability of an occurrence of a defect is very low. Consequently, this contributes to improved yield of micromachines.

公开(公告)号：DE602004002159D1

公开(公告)日：2006-10-12

申请号：DE602004002159

申请日：2004-08-18

Applicant: SEIKO EPSON CORP

Inventor： YAMAZAKI TETSURO ,  YONEKUBO MASATOSHI ,  TAKEDA TAKASHI

IPC: G02B26/08 ,  H04N5/74

Abstract: An optically controlled device includes a transparent electrode (202), a conductivity variable portion (203), a driving electrode (204), a movable unit (108), and a support portion (206). A method of controlling the optically controlled device includes inputting a control light into the transparent electrode, applying a voltage between the transparent electrode and the movable unit modulating either the intensity of the control light or the voltage according to an input signal, and moving the movable unit to a predetermined position by generating a force proportional to the voltage between the driving electrode and the movable unit based on a change of electrical conductivity of the conductivity variable portion.

公开(公告)号：DE69828034D1

公开(公告)日：2005-01-13

申请号：DE69828034

申请日：1998-10-07

Applicant: SEIKO EPSON CORP

Inventor： TAKEDA TAKASHI ,  YONEKUBO MASATOSHI

IPC: G02B26/02 ,  G02B26/08 ,  G09F9/30 ,  G09F9/37

Abstract: A picture display device in accordance with the present invention is provided with a light guiding member equipped with a total reflection surface capable of totally reflecting and transmitting an incoming light ray for image display, and an optical switching member having a micro prism that extracts evanescent light leaking out of the total reflection surface and reflects it to a display area of the total reflection surface. The incoming light ray is applied to the display area from two symmetric directions so as to obtain outgoing light rays from all surfaces of the micro prism. Hence, a picture display device featuring still higher brightness and higher contrast can be attained. Furthermore, an apex angle of the micro prism, etc. are optimized thereby to provide further uniform outgoing light arranged perpendicularly with respect to the total reflection surface, thus realizing a picture display device capable of displaying high-quality images.

公开(公告)号：GB2182787B

公开(公告)日：1989-10-04

申请号：GB8626284

申请日：1986-11-04

Applicant: SEIKO EPSON CORP

Inventor： YONEKUBO MASATOSHI

IPC: G02B7/09 ,  G11B7/08 ,  G11B7/085 ,  G11B7/09 ,  G11B11/105

Abstract: An apparatus for reading data to and from a moving magneto-optical recording medium includes a carriage which is moved across data tracks contained in the medium. Optics for focusing a spot of light on the medium and a mechanism for fine tracking of the spot on a selected track are carried on the carriage and are movable independently of the carriage in response to separately amplified servo signals which are derived from light which is reflected from the spot of light on the data-containing track.