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US 5,414,508 AGranted
Optical cell and optical detection systems light absorption
AssigneeHitachi, Ltd.
InventorsSatoshi Takahashi, Hideki Kambara
Life of this patent
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AssigneeHitachi, Ltd.
InventorsSatoshi Takahashi, Hideki Kambara
Estimating the term…
An optical cell or an optical detection system, of a simple structure having a small light path length, such as, for example, an optical cell having a light path length equal to that of a capillary. Light incidence and exit surfaces of the optical cell are each formed by a half transmitting mirror, and light is made incident on the optical cell in a direction perpendicular to the cell. The reflectance of the half transmitting mirror formed at the incidence surface is set smaller than that of the half transmitting mirror formed at the exit surface. The said optical cell or optical detection system is used as an optical detector portion of a sample separation and detection system which is for separation and detection of a sample using a liquid chromatography system or an electrophoresis system. Because of multi-reflection of light between both half transmitting mirrors, an effective increase of absorbance is obtained and even a sample whose absorbance is not higher than the noise level can be detected easily in high sensitivity. Further, since even a low concentration of sample does not cause lowering in the intensity of fluorescence, it is possible to detect both absorbance and fluorescence simultaneously.
An optical cell for measuring light absorption by a sample solution in the cell comprising:
An optical cell for measuring a light absorption by a sample solution in the cell comprising:
An optical detection system for light absorption comprising:
An optical detection system for light absorption comprising:
An optical cell for measuring light absorption by a sample solution in the cell comprising:
An optical detection system for light absorption comprising:
A cylindrical optical cell for measuring a light absorption by a sample solution in the cell comprising:
An optical detection system for light absorption comprising:
An optical detection system for light absorption comprising:
Dependencies are inferred from the claim text.