Optics: measuring and testing – By dispersed light spectroscopy
Patent
1994-01-27
1995-11-21
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
356318, 2504581, G01J 342, G01J 3443
Patent
active
054692555
ABSTRACT:
A method of spectrometry is disclosed for measuring transient absorbance and transient absorption spectrum of a substance to be measured at interfaces in liquid phase of particulates containing a fluorescent pigment and the substance to be measured by the utilization of optical resonance phenomenon. An apparatus for carrying out the method is also disclosed and comprises: (a) a pulse laser oscillator for exciting the fluorescent pigment and the substance to be measured, respectively; (b) an optical delay device for causing delay of any one of pulse laser beams of two kinds of wavelengths generated by the pulse laser oscillator; (c) a microscope system for condensing laser beams generated by the pulse laser oscillator and irradiating the condensed beams to the sample; and (d) a detector for detecting light emission of the sample. According to the method of the present invention, it is possible to measure transient absorbance and transient absorption spectrum at a high sensitivity even when particulates containing the substance to be measured in liquid phase are present.
REFERENCES:
patent: 5212382 (1993-05-01), Sasaki et al.
patent: 5283417 (1994-02-01), Misawa et al.
Kamada et al., "Microparticle Laser: Temporal characteristics and Intractivity Absorption Effects", in Abstracts of 6th Symposium on Unconventional Photoactive Solids, Aug. 1993.
Kamada et al., "Picosecond Lasing Dynamics of an Optically Trapped Microparticle", in Abstracts of KUL-JRDC Joint Symposium on Spectroscopy and Chemistry in Small Domains, Aug. 1994.
Kamada et al., "Trapping Single-Particulate by Laser Beam, and Laser Emission Applications for Transient Absorption Measurment in Particulates", in Abstracts of 65th Spring conference of the Chemical Society of Japan, Apr. 1993.
Kamada et al., "Measurement of Transient Absorption Micro-Area of Single Particulates by Laser Emission", in Abstracts of Conference on Molecular Structure, Oct. 1993.
Misawa et al., "Chemistry Letters", Chemical Society of Japan, pp. 1479-1482, 1990.
Kamada Kenji
Kitamura Noboru
Masuhara Hiroshi
Sasaki Keiji
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