| Project/Area Number |
60840011
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
物理化学一般
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| Research Institution | RESEARCH INSTITUTE FOR MATERIAL SCIENCE AND ENGINEERING School of Engineering, Fukui University |
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Principal Investigator |
SHINDO YOHJI Professor, School of Engineering, Fukui University, 工学部, 教授 (70020229)
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| Co-Investigator(Kenkyū-buntansha) |
阪柳 信之 日本分光工業株式会社, 装置第4課, 主任
SAKAYANAGI Nobuyuki Chief Engineer of Spectrometer Division, Japan Spectroscopic Co.
坂柳 信之 日本分光工業株式会社, 装置第4課, 主任
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥13,800,000 (Direct Cost: ¥13,800,000)
Fiscal Year 1986: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1985: ¥12,000,000 (Direct Cost: ¥12,000,000)
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| Keywords | POLARIZATION-MODULATION SPECTROMETER FOR CD & ORD / CD & ORD SPECTROPOLARIMETER / MUELLER MATRIX METHOD / SIMULTANEOUS CD & ORD MESUREMENTS / 円二色性 / 旋光分散 / ミュラー解析法 |
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| Research Abstract |
From the Mueller matrix approach, we designed and constructed a new polarization-modulation spectrometer for simultaneous circular dichroism(CD) and optical rotatory dispersion(ORD) measurements. We also used the Mueller matrix for analyzing and evaluating the possible causes of the base-line shift and other important features determining the performance of the new spectrometer. We have found that the performance of our spectrometer depends upon mainly the following facts: 1. the harmonic rejection of the lock-in amplifiers, 2. the quality of the birefringent prisms used as the polarizer and the analyzer, 3. the position of the analyzer, 4. the residual static birefringence of the photo-elastic modulator, 5. the residual static birefringence of the quartz plates used as the windows of the modulator.
We have cleared away the above obstacles by using the highest quality of the lock-in amplifiers, of the modulator, of the quartz plates, and of the prisms mounted on the prism holders specially designed for delicate adjustment. As a result, the capability of our new spectrometer in measuring CD and ORD signals is equal to that of commercially available CD and ORD spectropolarimeters in the range from 200nm to 700nm. We have also successfully interfaced an IBM PC/XT personal computer to our spectrometer by using a Data Translation DT-2805 I/O board, and accomplished on-line real-time data acqusition and data-processing. The all programs for these procedures are written in ASYST available from MacMillan Software Co..
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