セキ－キンセキガイ ソクテイヨウ ブンコウケイコウ コウドケイ ノ コウリョウシケイ シキソ ノ ケントウ

Spectrofluorophotometric quantum counter dye for fluorescent samples under excitation of light 600-700 nm wavelength range was investigated. Five kinds of cyanine, three of methylene blue and three of phthalocyanine dyes respectively, were provided for examination. As the results of characteristic measurements, we found that methylene blue trihydrate has most superior characteristics for absorption-fluorescent spectra and for stabirity. Measuring the fluorescent spectra of fluorescent samples (cyanine dye) under various exciting light intensities, using the methylene blue trihydrate for spectrofluorophotometric quantum counter dye, the practical accuracy of this quantum counter dye was proofed. Adjustment of the compensator of spectrofluorophotometer enabled us to measure corrected fluorescent spectrum until wavelength by 830 nm. Consequently, relative fluorescent quantum yields for samples such as cyanine dyes has become obtainable till nearinfrared wavelength range

ニシュルイ ノ コウリョウシケイシキソ オ モチイタ コウタイイキ ブンコウケイコウ コウドケイ ノ セイサク

Wide wavelength range spectrofluorophotometer, exchangeable for short (300～600 nm) and for long (485～825 nm) wavelength compensating channels, has been designed on the base of Shimazu RF-502 spectrofluorophotometer, using Rhodamine B and Methylene blue as quantum counter dyes. Making of compensator suitable for this system. and spectral energy correction on fluorescent spectrometer and on photomultipliyer by standard tungsten lamp have been examined. Moreover to connect personal computer with this wide wavelength range spectrofluorophotometer an input preamplifier and programs for data treatment were designed, and consequently real time operation become enabled. 0n the results of above experiments the wide wavelength spectrofluorophotometric measurements with highly accuracy has becom expected, comparing fluorescent samples having long wavelength spectrum such as cyanine dyes with that of short wave characteristics having well known fluorescent quantum yield

PbSヒカリデンドウタイ ノ デンキョク ニ ヨル V-Iトクセイ ト ザツオントクセイ

Noise characteristics produced between electrodes and chemically deposited PbS Photoconductor surfaces were examined. After deposited, PbS films were oxidized under several annealing temperatures. Electrodes were formed with pasted materials such as gold or silver paste, C.C (colloidal carbon) and MAg (metallo organic Ag). 0bserved noises were mainly 1/f noises, and higher the oxidizing temperatures for PbS films. the value of noise becomes larger. More-over the magnitudes of noises were affected with the kind of electrode materials in the order relation of Au<Ag<C.C<MAg. To know the influence of surface contactness irregularity on noise characteristics. several measurements were executed.-(a)with using different particle size C.C electrode, -(b) changing roughness of the PbS surface by controlling the condition of PbS deposition. But little affection was observed on 1/f noise. From the measurement of V-I characteristics of PbS films there become evident that the 1/f noise become large with the order of non-ohmic contactness become large, that is the space charge limiting effect may be become predominant