Oki Electric Industry Co., Ltd.

Yoshitaka Terao

Akihiko Nishiki

Tsutomu Nomoto

Hideo Sawai

Atsushi Takahashi

Yukio Nakamura

Hiromi Takahashi

Ichiro Koiwa

Kozo Fujii

Hiroshi Furuya

Mio Chiba

Hiroshi Tohyama

Naoyuki Shiozawa

Masao Ikehata

Yuuji Terouchi

An optical filter is manufactured by placing a photosensitive optical fiber in a spiral arrangement on a fiber holder, preferably having a spiral groove for holding the fiber, and exposing the fiber to ultraviolet light through a phase mask having a spiral diffraction grating, forming an in-fiber Bragg grating. The fiber can be conveniently scanned by an ultraviolet beam as the fiber holder and phase mask turn on a rotating stage. The fiber can be compactly packaged between the fiber holder and a cover. The fiber holder and cover can be formed by coating a substrate with layers of polymer material, the spiral groove being formed by photolithographic patterning of one of the layers.

Optical filter fabrication method and apparatus, optical filter, fiber holder with spiral groove, and phase mask

Optical filter fabrication method using fiber holder with spiral groove and phase mask with spiral diffraction grating

A method is for driving a gas discharge type light emission apparatus having an electrode block line(s) constituted by electrode blocks. Scanning of adjacent cathodes, one being in one of two adjacent electrode blocks and the other being in the other electrode block, is effected such that subsequent to the scanning of one adjacent cathode, at least one cathode other than the other adjacent cathode is scanned prior to the scanning of the other adjacent cathode. By the method, crosstalk between adjacent electrode blocks is prevented without the provision of a partitioning member between the adjacent electrode blocks. A gas discharge type light emission apparatus includes an anode(s) on a front substrate and cathodes on a rear substrate. The anodes and cathodes face one another via a discharge gas medium to constitute discharge cells. The anodes are made of a light-blocking material and including windows at positions corresponding to the cathodes. The windows are also provided at positions corresponding to boundaries between adjacent anodes. By providing windows, discharge light emission having a clear shape and a high resolution can be obtained.

Gas discharge type light emission apparatus and method of driving the

A gas discharge panel with a plurality of electrically conductive oxide cathode electrodes and a plurality of anode electrodes that are arranged in a matrix in a sealed container. This electrically conductive oxide cathode electrode is formed using, for example, lanthanum chromite, lanthanum calcium chromite, alumina-doped zinc oxide, or antimony-doped tin oxide.

Gas discharge panel

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Tokyo, Japan

Yoshitaka Terao