Keiji Ohtaka

Person

Yokohama-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Polarization beam splitter and optical system using the same, and i...
- Patent number 7,301,700
- Issue date Nov 27, 2007
- Canon Kabushiki Kaisha
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Grant
Polarization element and optical device using polarization element
- Patent number 7,236,655
- Issue date Jun 26, 2007
- Canon Kabushiki Kaisha
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Grant
Polarization element and optical device using polarization element
- Patent number 7,155,073
- Issue date Dec 26, 2006
- Canon Kabushiki Kaisha
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Grant
Polarization beam splitter and optical system using the same, and i...
- Patent number 7,116,478
- Issue date Oct 3, 2006
- Canon Kabushiki Kaisha
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Grant
Optical device and method for selecting object of focus
- Patent number 7,071,985
- Issue date Jul 4, 2006
- Canon Kabushiki Kaisha
- Hitoshi Onoda
- G02 - OPTICS
Information Patent Grant
Projection image display apparatus
- Patent number 6,831,706
- Issue date Dec 14, 2004
- Canon Kabushiki Kiasha
- Masayuki Abe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image display apparatus and optical system
- Patent number 6,594,085
- Issue date Jul 15, 2003
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Focus state detection apparatus with image sensing device controls
- Patent number 6,577,344
- Issue date Jun 10, 2003
- Canon Kabushiki Kaisha
- Terutake Kadohara
- G02 - OPTICS
Information Patent Grant
Anti-fog coating material and method of preparing an anti-fog article
- Patent number 6,506,446
- Issue date Jan 14, 2003
- Canon Kabushiki Kaisha
- Tohru Yamamoto
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Camera having antifogging film
- Patent number 6,327,430
- Issue date Dec 4, 2001
- Canon Kabushiki Kaisha
- Keiji Ikemori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Anti-fogging coating material, anti-fogging coating film and anti-f...
- Patent number 6,306,932
- Issue date Oct 23, 2001
- Canon Kabushiki Kaisha
- Tohru Yamamoto
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Focus detecting device
- Patent number 6,088,537
- Issue date Jul 11, 2000
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Observation optical system and optical apparatus having the same
- Patent number 6,055,376
- Issue date Apr 25, 2000
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Camera with visual axis detecting device
- Patent number 6,014,524
- Issue date Jan 11, 2000
- Canon Kabushiki Kaisha
- Kenji Suzuki
- G02 - OPTICS
Information Patent Grant
Semiconductor photo-sensor and method for manufacturing the same
- Patent number 5,912,504
- Issue date Jun 15, 1999
- Canon Kabushiki Kaisha
- Tetsuo Yoshizawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Focus detecting apparatus
- Patent number 5,864,721
- Issue date Jan 26, 1999
- Canon Kabushiki Kaisha
- Yasuo Suda
- G02 - OPTICS
Information Patent Grant
Focus detecting apparatus
- Patent number 5,839,001
- Issue date Nov 17, 1998
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Focus detection device for objective lens
- Patent number 5,797,049
- Issue date Aug 18, 1998
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Focus detecting apparatus
- Patent number 5,771,413
- Issue date Jun 23, 1998
- Canon Kabushiki Kaisha
- Yasuo Suda
- G02 - OPTICS
Information Patent Grant
Focus detecting apparatus and optical apparatus using it
- Patent number 5,729,771
- Issue date Mar 17, 1998
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Method for manufacturing a semiconductor photo-sensor
- Patent number 5,583,076
- Issue date Dec 10, 1996
- Canon Kabushiki Kaisha
- Tetsuo Yoshizawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Camera with visual axis detecting device
- Patent number 5,486,892
- Issue date Jan 23, 1996
- Canon Kabushiki Kaisha
- Kenji Suzuki
- G02 - OPTICS
Information Patent Grant
Light emission device for focus detection having a chart and an ill...
- Patent number 5,459,551
- Issue date Oct 17, 1995
- Canon Kabushiki Kaisha
- Kenji Suzuki
- G02 - OPTICS
Information Patent Grant
Compact focus detecting device suitable for incorporation into an o...
- Patent number 5,262,819
- Issue date Nov 16, 1993
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Grant
Image pickup apparatus for controlling accumulation time in photoel...
- Patent number 5,182,658
- Issue date Jan 26, 1993
- Canon Kabushiki Kaisha
- Akira Ishizaki
- G02 - OPTICS
Information Patent Grant
Focus detection device having a plurality of means for forming ligh...
- Patent number 5,109,154
- Issue date Apr 28, 1992
- Canon Kabushiki Kaisha
- Masaki Higashihara
- G02 - OPTICS
Information Patent Grant
Information display apparatus for camera
- Patent number 5,053,803
- Issue date Oct 1, 1991
- Canon Kabushiki Kaisha
- Yasuo Suda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Focus detecting apparatus having a plurality of focus detecting areas
- Patent number 5,005,041
- Issue date Apr 2, 1991
- Canon Kabushiki Kaisha
- Yasuo Suda
- G02 - OPTICS
Information Patent Grant
Focus detecting device switching between passive and active detection
- Patent number 4,992,817
- Issue date Feb 12, 1991
- Canon Kabushiki Kaisha
- Keisuke Aoyama
- G02 - OPTICS
Information Patent Grant
Focus detecting device having a plurality of detecting areas and ca...
- Patent number 4,992,819
- Issue date Feb 12, 1991
- Canon Kabushiki Kaisha
- Keiji Ohtaka
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
POLARIZATION BEAM SPLITTER AND OPTICAL SYSTEM USING THE SAME, AND I...
- Publication number 20070058251
- Publication date Mar 15, 2007
- Canon Kabushiki Kaisha
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Application
Polarization element and optical device using polarization element
- Publication number 20060204163
- Publication date Sep 14, 2006
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Application
Polarization element and optical device using polarization element
- Publication number 20050249447
- Publication date Nov 10, 2005
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Application
Polarization beam splitter and optical system using the same, and i...
- Publication number 20050078372
- Publication date Apr 14, 2005
- Kazuhiko Momoki
- G02 - OPTICS
Information Patent Application
Projection image display apparatus
- Publication number 20030117593
- Publication date Jun 26, 2003
- Masayuki Abe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Anti-fog coating material and anti-fog article
- Publication number 20020061950
- Publication date May 23, 2002
- Tohru Yamamoto
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Application
Image display apparatus and optical system
- Publication number 20020021498
- Publication date Feb 21, 2002
- Keiji Ohtaka
- G02 - OPTICS
Information Patent Application
FOCUS STATE DETECTION APPARATUS WITH IMAGE SENSING DEVICE CONTROLS
- Publication number 20020003582
- Publication date Jan 10, 2002
- TERUTAKE KADOHARA
- G02 - OPTICS

Keiji Ohtaka

Person

Patents Grantslast 30 patents

Polarization beam splitter and optical system using the same, and i...

Polarization element and optical device using polarization element

Polarization element and optical device using polarization element

Polarization beam splitter and optical system using the same, and i...

Optical device and method for selecting object of focus

Projection image display apparatus

Image display apparatus and optical system

Focus state detection apparatus with image sensing device controls

Anti-fog coating material and method of preparing an anti-fog article

Camera having antifogging film

Anti-fogging coating material, anti-fogging coating film and anti-f...

Focus detecting device

Observation optical system and optical apparatus having the same

Camera with visual axis detecting device

Semiconductor photo-sensor and method for manufacturing the same

Focus detecting apparatus

Focus detecting apparatus

Focus detection device for objective lens

Focus detecting apparatus

Focus detecting apparatus and optical apparatus using it

Method for manufacturing a semiconductor photo-sensor

Camera with visual axis detecting device

Light emission device for focus detection having a chart and an ill...

Compact focus detecting device suitable for incorporation into an o...

Image pickup apparatus for controlling accumulation time in photoel...

Focus detection device having a plurality of means for forming ligh...

Information display apparatus for camera

Focus detecting apparatus having a plurality of focus detecting areas

Focus detecting device switching between passive and active detection

Focus detecting device having a plurality of detecting areas and ca...

Patents Applicationslast 30 patents

POLARIZATION BEAM SPLITTER AND OPTICAL SYSTEM USING THE SAME, AND I...

Polarization element and optical device using polarization element

Polarization element and optical device using polarization element

Polarization beam splitter and optical system using the same, and i...

Projection image display apparatus

Anti-fog coating material and anti-fog article

Image display apparatus and optical system

FOCUS STATE DETECTION APPARATUS WITH IMAGE SENSING DEVICE CONTROLS