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12 results on '"grating"'

1. Distributed-Feedback Solid-State Dye Laser in Visible Wavelength Region.

Author

NAKAI, Naoya and FUKUDA, Makoto

Subjects
DYE lasers, XEROGELS, RHODAMINE B, STILBENE, ND-YAG lasers, DIFFRACTION gratings
Abstract

We fabricated two types of relief gratings by an etchless process utilizing a two-beam interference method. The gratings had a pitch of 403 and 272 nm, respectively. The gratings were coated with solidified organic dyes, such as rhodamine and stilbene 420, with xerogel or acrylic plastic as a host material for the organic dyes. The samples were pumped with the second or the third harmonic generation of Nd: YAG laser, and we obtained laser oscillations at 600.5, 601.1 nm in the red wavelength region and at 407.1 nm in the blue wavelength region. The spectra had widths of 0.1 nm. Therefore, we showed that a DFB solid-state dye laser can emit single longitudinal mode laser beams. We also evaluated other optical properties of the gratings. The results showed that the gratings have enough diffraction efficiency and enough durability to be used as a resonator of DFB solid dye lasers. [ABSTRACT FROM AUTHOR]

Published
2009
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2. Performance evaluation of the grating used in the extreme ultraviolet spectroscope (EXCEED) on the HISAKI satellite

Author

Hikida, Reina, Yoshioka, Kazuo, Murakami, Go, Kuwabara, Masaki, and Yoshikawa, Ichiro

Subjects
EXCEED, Extreme Ultraviolet, Grating, Secondary Light
Abstract

EXCEED (EXtreme ultraviolet spectrosCope for ExosphEric Dynamics)は, ひさき衛星に搭載され, 地球周回軌道から惑星大気の観測を行っている極端紫外分光撮像装置である. EXCEEDに用いられているラミナー回折格子では, 理論的には偶数次の回折光が生じないことが知られている. しかし, EXCEEDの観測データによると, 二次光の混入が確認されている. そこで我々は, 観測データを用いた解析と, EXCEEDに搭載された回折格子とほぼ同じ仕様の回折格子(QM: qualification model)を用いた実験によって, 一次光と二次光の回折効率の比を評価した. その結果, 一次回折効率に対する二次回折効率の比は, EXCEEDに搭載された回折格子(FM: flight model)に波長58. 4nm, 68. 0nmの光を入射した場合はともに14%程度であり, QMに波長58. 4nm, 67. 2nm, 73. 5nmの光を入射した場合はそれぞれ42%, 28%, 22%程度であることがわかった., EXCEED (EXtreme ultraviolet spectrosCope for ExosphEric Dynamics) observes the extreme ultraviolet radiation from planetary atmosphere on the HISAKI satellite since its launch in September 2013. The laminar-type diffraction grating is used in the instrument. For the laminar-type grating, it is known that there are no secondary diffracted lights in theory. However, the contamination of secondary lights is indicated from the data obtained by EXCEED. Therefore, the evaluation of the diffraction efficiency of the secondary lights is necessary for scientific analysis using data obtained by EXCEED. In this work, we evaluate the diffraction efficiency of the secondary lights by analyzing the spectral data obtained by EXCEED. The results are compared with the laboratory measurements by using the spare model (qualification model)., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1630032000, レポート番号: JAXA-RR-16-012

Published
2017

3. Measuring the wavelength of light with a metal ruler

Subjects
steel ruler, grating, He-Ne laser, wavelength of light
Abstract

An surprisingly easy method of measuring the wavelength of light based on diffraction from the indentations of a metal ruler, that has been reported in an article of the OSA magazine, is discussed with results and error estimation. This method is suitable for a student experiment in optics.

Published
2007

4. Study on UV and visible light spectrometer onboard an atmospheric science observation small synchronous satellite (GOAL)

Author

Okumura, Shinichiro, Suzuki, Makoto, Yoshida, Shigeomi, Watanabe, Masaharu, Ogawa, Toshihiro, Nakamura, Masato, and Imamura, Takeshi

Subjects
atmospheric chemistry, 航空機搭載OPUS, 衛星搭載装置, 小型科学衛星, satellite-borne instrument, GOAL, 大気化学, remote sensing, grating, small scientific satellite, リモートセンシング, 回転ミラー, 回折格子, rotating mirror, spectrometer, Airborne-OPUS, 分光計, CCD
Abstract

次世代の広域大気科学観測の計画として、われわれは小型静止衛星(GOAL)による観測を提案している。ここでは、本小型衛星に搭載するセンサの1つとして、高感度、高空間分解能観測の要求を満たすことのできる紫外・可視領域のグレーティング分光計の実現性について検討する。, 資料番号: AA0049122092

Published
2005

5. 表面矩形キャビティからのスペクトル選択性熱放射と高温ナノ構造安定性

Author

Yugami, Hiroo, Sai, Hitoshi, Kanamori, Yoshiaki, and Hane, Kazuhiro

Subjects
放射制御, radiation control, numerical analysis, optical property, 数値解析, microstructure, Physics::Optics, cavity, 熱安定性, thermal stability, 格子, grating, 微細構造, 熱放射, 空洞, thermal radiation, 光学特性
Abstract

Thermal stability as well as optical properties of submicron-period microstructures on W surfaces has been investigated for developing new radiation control devices in space. Numerical calculations based on rigorous coupled-wave analysis are performed to determine the structural profile of gratings with good spectral selectivity. According to the determined parameters, two-dimensional W gratings composed of rectangular microcavities with the period of 1.0 micrometer are fabricated on single crystalline and polycrystalline W substrates. The grating shows a strong emission peak, which can be explained by the confined modes inside the cavities. The grating with 200 nm wall thickness made from a single crystalline W shows very high thermal stability over 1,400 K, while the polycrystalline grating is deformed at a high temperature because of the grain growth. It is confirmed that the thermal stability has been improved by using single crystalline substrates., 資料番号: AA0045438044

Published
2003

6. Changes of L-Ascorbic Acid Content and Amylase Activity in Japanese Radish caused by Time Elapse after Cutting or by Grating

Author

Nagai, Yuka and Moriuchi, Yasuko

Subjects
切断, storage, amylase, grating, おろし, アミラーゼ, 貯蔵, 大根, アスコルビン酸, L-ascorbic acid, cutting, Japanese radish
Abstract

大根の部位によりL-アスコルビン酸（AsA）含量が，大根の表皮では表皮を取り除いた内部の約2倍であり，また，葉付きの側を上部とすれば，下部より上部に多い。アミラーゼ活性では部位による差異はなく，おろし後の時間変化もAsAほど顕著ではなかった。大根のアミラーゼ活性はβ-アミラーゼ（5×10⁴AUN／g）濃度として4×10⁻²～10⁻¹g／dlの範囲であった。AsA含量とアミラーゼ活性との相関は認められなかった。切断後貯蔵7日間はAsA含量とアミラーゼ活性はほとんど変化がなく安定していた。

Published
1998

8. Symposium on Atom-Molecule Processes in Space 2002: Atom-Molecule Processes in Strong Fields. Strong Photon and Strong Coulomb Fields

Author

Institute of Space and Astronautical Science

Subjects
optical polarization, TOFスペクトロメーター, grating, pulsed laser, 遺伝的アルゴリズム, multiphoton ionization, genetic algorithm, 整列分子, photon field, ヨウ素分子, トンネルイオン化率, 高強度レーザー, 多光子イオン化, 光子場, quantum mechanics, 円偏光, high power laser, 偏光, グレーティング, aligned molecule, 量子力学, boundary condition, Schroedinger方程式, TOF spectrometer, 境界条件, iodine molecule, circular polarization, Schroedinger equation, パルスレーザー, tunneling ionization rate
Abstract

2002年度宇宙空間原子分子過程研究会 宇宙科学研究所 20030106-20030107 神奈川 日本, Symposium on Atom-Molecule Processes in Space 2002 Institute of Space and Astronautical Science 20030106-20030107 Kanagawa Japan, 資料番号: AA0045918000

Published
2003

9. Development of a simplified emissivity and solar absorptance measuring system

Author

Onishi, Akira, Tachikawa, Sumitaka, Nagano, Hosei, Yamana, Hiroaki, Katsuki, Shozo, Nakauchi, Shiho, and Sato, Ryoichi

Subjects
reflectance, thermopile, interferometer, 反射率, blackbody furnace, grating, 光学測定装置, hemispherical emissivity, 積分球, 回折格子, 半球放射率, ツェルニ・ターナ光学系, 吸収率, hemispherical reflectance, 太陽光, サーモパイル, optical measuring instrument, 半球反射率, absorptance, 放射率, emissivity, integrating sphere, Czerny-Turner optical system, sunlight, 干渉計, 黒体炉
Abstract

宇宙機熱設計の信頼性向上のためには熱制御材料の熱光学特性評価に基づく品質管理が不可欠である。筆者らは過去に高い信頼性を有する放射率装置ならびに太陽光吸収率装置を構築し、熱制御材料の評価を行ってきたが、これらの装置は測定に長時間を要すること、その場測定ができないことなどから、品質管理用の新たな熱光学特性評価システムの開発が望まれる。そこで本研究は、軽量で迅速にその場測定ができるポータブル放射率計測システムとポータブル太陽光吸収率計測システムを開発することを目的とする。本稿では、試作機の構築と実用化に向けての取り組みについて報告する。, 資料番号: AA0049122119

Published
2005

10. Control of the multiphoton ionization process of iodine molecules using time-dependent polarized pulses

Author

Suzuki, Takayuki, Nomura, Yutaka, Kayukawa, Naoto, Tanji, Haruka, Minemoto, Shinichiro, and Sakai, Hirofumi

Subjects
多光子イオン化, optical polarization, 円偏光, TOFスペクトロメーター, 偏光, グレーティング, aligned molecule, research and development, TOF spectrometer, grating, pulsed laser, iodine molecule, circular polarization, 遺伝的アルゴリズム, multiphoton ionization, genetic algorithm, 整列分子, パルスレーザー, ヨウ素分子, 研究開発
Abstract

資料番号: AA0045918001

Published
2003

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