公开(公告)号：DE602004010573T2

公开(公告)日：2008-11-27

申请号：DE602004010573

申请日：2004-06-21

Applicant: SEIKO EPSON CORP

Inventor： TAKEDA TAKASHI ,  HASHIMOTO AKIRA

IPC: G02B6/00 ,  G03B21/00 ,  G03B21/20

Abstract: The integrator has an emission side rod lens (53) upon which light emitted from emission surface of a triangular prism (52) is incident. The prism is made from glass with coefficient of refraction. The prism comprises of a reflective layer which reflects light incident into the prism from an incidence surface towards the emission surface. Air with lesser coefficient of refraction is provided at the two surfaces. An independent claim is also included for a projection type display apparatus comprising an illumination apparatus including a light conducting unit.

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：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：DE602004010573D1

公开(公告)日：2008-01-24

申请号：DE602004010573

申请日：2004-06-21

Applicant: SEIKO EPSON CORP

Inventor： TAKEDA TAKASHI ,  HASHIMOTO AKIRA

IPC: G02B6/00 ,  G03B21/00 ,  G03B21/20

Abstract: The integrator has an emission side rod lens (53) upon which light emitted from emission surface of a triangular prism (52) is incident. The prism is made from glass with coefficient of refraction. The prism comprises of a reflective layer which reflects light incident into the prism from an incidence surface towards the emission surface. Air with lesser coefficient of refraction is provided at the two surfaces. An independent claim is also included for a projection type display apparatus comprising an illumination apparatus including a light conducting unit.

公开(公告)号：DE602005002856D1

公开(公告)日：2007-11-29

申请号：DE602005002856

申请日：2005-03-17

Applicant: SEIKO EPSON CORP

Inventor： TAKEDA TAKASHI

IPC: G02F1/13357 ,  H04N9/31

Abstract: It is an object of the present invention to provide a light source unit that can supply bright light efficiently. The light source unit includes a light emitting unit (201) that emits light, a phase plate (204;404) that polarizes the light from the light emitting unit (201) to produce a first polarized light and a second polarized light that is polarized in a different direction with respect to the first polarized light, a reflecting-type polarizing plate (205) that transmits the first polarized light and reflects the second polarized light; and a reflector (202;302;502) that is provided near both the light emitting unit (201) and the phase plate (204;404), and reflects back a third light, which is a portion of the first polarized light and that passes through the phase plate (204,404), to the phase plate (204,404). The invention also provides a light source unit in which an evanescent coupling is used.

公开(公告)号：DE602004002159T2

公开(公告)日：2007-07-19

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：AT361897T

公开(公告)日：2007-06-15

申请号：AT99947884

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：DE69828034T2

公开(公告)日：2005-04-21

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：DE69326213T2

公开(公告)日：1999-12-30

申请号：DE69326213

申请日：1993-11-16

Applicant: SEIKO EPSON CORP

Inventor： SEKI HIDEYA ,  YONEKUBO MASATOSHI ,  ARIMURA TOSHIO ,  TAKEDA TAKASHI

IPC: G11B7/12 ,  G11B7/125 ,  G11B33/14 ,  H01S5/022 ,  H01S5/068 ,  H01S5/0683 ,  G11B7/135 ,  G11B7/09

Abstract: A laser beam emitted from the laser emission unit (20) is emitted through an objective lens (12) and focused on an optical medium. A reflected beam from the optical medium is returned through the objective lens and a diffraction grating (11) to a signal detection circuit (34) in the laser emission unit. Hitherto, many operating functions have been provided in the optical head (1). However, the present invention provides the laser emission unit in a lens holder (10) and with a plurality functions in the emission unit itself and so the space in the optical head can be reduced. Moreover, the space for the light path both emitted and received is also decreased. Thus, the size of the optical head is extremely reduced and since the optical head can be assembled by a smaller number of parts, the production costs can be decreased.