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Kusminarto Kusminarto
Department of Physics, Gadjah Mada University
Mathematics

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Phototransistor Based Position Sensitive Detector for Signal Detection in Photothermal Spectroscopy Kusminarto Kusminarto; Susilo Susilo
Jurnal Matematika & Sains Vol 9, No 2 (2004)
Publisher : Institut Teknologi Bandung

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Abstract

In a photothermal spectroscopy the signal change is indicated by the displacement of the probe laser beam, therefore a position sensitive detector (PSD) is required to record this displacement that is proportional to the intensity of the signal.A phototransistor (BPY62D) based PSD has been designed and constructed. A Darlington circuit has been employed to increase the sensitivity of the PSD. Sensitivity of 100.6 mV/mm has been achieved which covered a linear area of 0,5 mm.
Co-Authors Susilo Susilo