1
Tetsuo Hattori, Yoshiro Oikawa: Projection-display apparatus and method providing improved brightness of projected color image. Nikon Corporation, Klarquist Sparkman Campbell Leigh & Whinston, August 25, 1998: US05798819 (69 worldwide citation)

Methods and apparatus are disclose for obtaining a bright projected color image. In a representative apparatus, polarized beam splitters (one for each primary color of an image to be projected) separate p-polarized light and s-polarized light for each of the primary colors. Each separated s- and p-p ...


2
Kou Ohno, Tetsuo Hattori, Tsuyoshi Matsumoto: Absolute position detection encoder. Nikon Corporation, Michael N Meller, November 26, 1991: US05068529 (53 worldwide citation)

An absolute position detection encoder includes a coder having a track provided with first graduations of an absolute pattern and second graduations of an incremental pattern, plural sensors movable relative to the coder along the longitudinal direction of the track, and a signal processing circuit ...


3
Yoshiro Oikawa, Motoi Ueda, Kazufumi Ishibashi, Masaaki Kusano, Tetsuo Hattori: Projection type display apparatus. Nikon Corporation, Foley & Lardner, May 16, 2000: US06062694 (47 worldwide citation)

The present invention relates to a projection type display apparatus which utilizes a polarizing beam splitter and/or a color separating/combining optical system, each being constituted by an optically transparent material block having a specific characteristic, thereby being capable of securing opt ...


4
Shunji Watanabe, Tatsushi Nomura, Takamitsu Fujiu, Yoshinori Sango, Toru Fujii, Tetsuo Hattori: Piezoelectric vibration angular velocity meter and camera using the same. Nikon Corporation, Foley & Lardner, June 9, 1998: US05765046 (39 worldwide citation)

A piezoelectric angular velocity meter includes a piezoelectric element. The piezoelectric element includes a first piezoelectric element and a second piezoelectric element bonded to the first piezoelectric element. The second piezoelectric element includes a second member made of a piezoelectric cr ...


5
Naotaka Shimamura, Tetsuo Hattori, Mikio Okamoto: Mirror and projection type display apparatus. Nikon Corporation, Foley & Lardner, June 19, 2001: US06249378 (38 worldwide citation)

A mirror comprises a transparent glass substrate and a dielectric multilayer film laminated on one surface (entrance surface) of the glass substrate. The dielectric multilayer film is formed by layers made of a high refractive index material and layers made of a low refractive index material which a ...


6
Takamitsu Fujiu, Shunji Watanabe, Tatsushi Nomura, Yoshinori Sango, Toru Fujii, Tetsuo Hattori: Atomic force microscope using cantilever attached to optical microscope. Nikon Corporation, Pennie & Edmonds, November 18, 1997: US05689063 (35 worldwide citation)

Without necessitating complicated operations, an image of a low to medium magnification and an image of a high magnification are efficiently observed by an optical microscope and by an atomic force microscope, respectively. In the atomic force microscope, an atomic force microscope probe, whose size ...


7
Shunji Watanabe, Tatsushi Nomura, Takamitsu Fujiu, Yoshinori Sango, Toru Fujii, Tetsuo Hattori: Piezoelectric vibration angular velocity meter and camera using the same. Nikon Corporation, Foley & Lardner, August 11, 1998: US05794080 (26 worldwide citation)

When a power switch is turned on, first and second analog switches are turned on while a third analog switch is turned off. Accordingly, at the time of starting, a forced excitation driving circuit supplies to a vibrator an oscillation output pulse which is substantially at the resonance frequency o ...


8
Hiroshi Maki, Kiyoshi Numazaki, Masaaki Kusano, Tetsuo Hattori, Atsushi Sekine: Projection type display apparatus. Nikon Corporation, Foley & Lardner, February 12, 2002: US06345895 (26 worldwide citation)

An analyzing-synthesizing optical system has the structure in which for each of the three primary colors of R, G, and B, there are provided a light valve for modulating incident light and a polarization beam splitter for guiding specific polarized light to this light valve and extracting only modula ...


9
Sampei Esaki, Kunihiko Yoshino, Shingo Inoue, Katsuhiko Katano, Tetsuo Hattori: Optical apparatus using polarizing beam splitter. Nikon Corporation, Pennie & Edmonds, February 10, 1998: US05716122 (24 worldwide citation)

The present invention relates to optical apparatus provided with an optical element for outputting polarized light beams separated generally in parallel. The optical apparatus according to this invention comprises an optical element having a pair of optical members being prisms cross sections of whi ...


10
Atsushi Sekine, Hideaki Shimomura, Tetsuo Hattori: Polarization device and projection type display apparatus. Nikon Corporation, Pillsbury Madison & Sutro, May 23, 2000: US06067193 (23 worldwide citation)

A polarization device comprises: a light source; a first lens plate including a plurality of lenses in a planar configuration that divides light emitted from the light source into beams defined by apertures of the plurality of lenses; a second lens plate which is different from the first plate and i ...