テープレコーダを用いた分光透過率のアナログ演算方式

概要

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A simple analog technique for the computation of transmittance from the data obtained by single beam recording spectrometers is described.Wavelength scanning of the spectrometer is executed by a pulse motor connected to the scanning shaft, and operated by pulses reproduced from one channel of a conventional multi-track magnetic tape recorder set in play back mode.Prior to the computation, the reference-beam signal is recorded in another channel of the tape recorder.In the subsequent scan for presenting the transmittance curve, the stored reference-beam signal is fed into a servodivider together with the sample-beam signal which is derectly derived from the spectrometer.The wavelength scanning by means of the pulse motor makes it possible to keep the accurate synchronism between the reference beam and sample-beam signals.The servodivider used is easily obtained by remodeling a conventional chart recorder.The overall accuracy of the system operated in conjunction with a spectrometer is better than0.5% for a considerably high reference signal level.
社団法人日本分光学会の論文