Raman scattered light measuring apparatus
First Claim
1. A Raman scattered light measuring apparatus for irradiating a sample in a sample part to detect Raman scattered light from said sample and thereby measure a target component in said sample, said apparatus comprising:
- a near infrared semiconductor laser diode having a wavelength of at least 800 nm for irradiating said sample with excitation light;
a photo receiving part consisting of a filter which passes light having a specific vibration wave number of said target component;
a first detector, comprising a photodetector consisting of Ge, InGaAs or PbS, for detecting said Raman scattered light being transmitted through said filter.
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Accused Products
Abstract
A Raman scattered light measuring apparatus comprises a near infrared semiconductor laser diode as a light source for irradiating a sample with excitation light, while a photoreceiving part for receiving Raman scattered light from the sample comprises a bandpass filter having a vibration wavenumber which is specific to a sample component to be measured as a central wavelength of its transmission region, and a detector consisting of a photodiode of Ge, InAs or InGaAs or a photomultiplier having sensitivity in a near infrared region for detecting Raman scattered light which is transmitted through the bandpass filter.
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Citations
7 Claims
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1. A Raman scattered light measuring apparatus for irradiating a sample in a sample part to detect Raman scattered light from said sample and thereby measure a target component in said sample, said apparatus comprising:
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a near infrared semiconductor laser diode having a wavelength of at least 800 nm for irradiating said sample with excitation light; a photo receiving part consisting of a filter which passes light having a specific vibration wave number of said target component; a first detector, comprising a photodetector consisting of Ge, InGaAs or PbS, for detecting said Raman scattered light being transmitted through said filter. - View Dependent Claims (3, 4, 5, 6, 7)
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2. A Raman scattered light measuring apparatus for irradiating a sample in a sample part to detect Raman scattered light from said sample and thereby measure a target component in said sample, said apparatus comprising:
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a near infrared semiconductor laser diode having a wavelength of at least 800 nm for irradiating said sample with excitation light; a photo receiving part consisting of a filter which passes light having a specific vibration wave number of said target component; a first detector, comprising a photomultiplier having sensitivity in a near infrared region, for detecting said Raman scattered light being transmitted through said filter.
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Specification