Optics: measuring and testing – By shade or color – With color transmitting filter
Patent
1982-07-06
1984-11-27
Evans, F. L.
Optics: measuring and testing
By shade or color
With color transmitting filter
356419, G01J 350
Patent
active
044848170
ABSTRACT:
In a chemical analyzing apparatus of a colorimetric type in which a light flux transmitted through a test liquid is made incident upon a light receiving element through an optical filter having a predetermined transmission spectrum range and a measurement signal is obtained by processing a photoelectrically converted signal, a plurality of optical filters having different transmission spectrum ranges and arranged side by side and a solid state image sensor having a plurality of light receiving elements each having a photoelectric converting element and a static induction transistor are arranged one upon the other. An analytical result is obtained by calculating output signals selectively derived from light receiving elements which are arranged behind a particular optical filter having a transmission spectrum range related to a wavelength determined by a test item to be studied. Since use is made of a static induction transistor, it is not necessary to change the optical filters mechanically and is possible to read out the necessary output signals having high S/N selectively in a prompt manner, while the levels of output signals can be monitored.
REFERENCES:
patent: 3869212 (1975-03-01), Burcher et al.
patent: 4054389 (1977-10-01), Owen
Gocho Nagahiro
Hayashi Asao
Kambara Koji
Nobuto Toru
Tojiki Hitomi
Evans F. L.
Olympus Optical Co,. Ltd.
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