FOURIER TRANSFORM TYPE SPECTROPHOTOMETER

To provide a Fourier transform type spectrophotometer capable of reducing jitter noise even if an A/D converter for converting a detection signal from a detector from analog to digital at a natural period is used.SOLUTION: A Fourier transform type spectrophotometer includes an A/D converter 3 for co...

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Bibliographic Details
Main Author KATO DAIJIRO
Format Patent
LanguageEnglish
Japanese
Published 07.11.2019
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Summary:To provide a Fourier transform type spectrophotometer capable of reducing jitter noise even if an A/D converter for converting a detection signal from a detector from analog to digital at a natural period is used.SOLUTION: A Fourier transform type spectrophotometer includes an A/D converter 3 for converting a detection signal from a detector 2 from analog to digital at a first natural period. A signal input part (PLD 4) generates an AD conversion start signal based on occurrence of a fringe signal used for controlling an interferometer 1 and a clock signal synchronized with the A/D conversion start signal, and inputs them to the A/D converter 3. An operation part 61 performs an operation using a Fourier transform on the basis of a detection signal converted from analog to digital by the A/D converter 3.SELECTED DRAWING: Figure 1 【課題】検出器からの検出信号を固有の周期でAD変換するADコンバータを用いた場合であっても、ジッターノイズを低減することができるフーリエ変換型分光光度計を提供する。【解決手段】フーリエ変換型分光光度計は、検出器2からの検出信号を固有の第1周期でAD変換するADコンバータ3を備える。信号入力部(PLD4)は、干渉計1の制御に用いられるフリンジ信号の発生に基づくAD変換開始信号と、前記AD変換開始信号と同期したクロック信号を生成し、ADコンバータ3に入力する。演算部61は、ADコンバータ3によりAD変換された検出信号に基づいて、フーリエ変換を用いた演算を行う。【選択図】 図1
Bibliography:Application Number: JP20180088776