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US 5,847,835 AGranted
Optical absorbance meter
AssigneeTosoh Corporation
InventorShingo Fukunaga
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AssigneeTosoh Corporation
InventorShingo Fukunaga
Estimating the term…
An optical absorbance meter has a flow passage for liquid to be tested, each end of which is closed with a flat light-transmission plate, an introducing path for introducing liquid to the flow passage and a discharging path for discharging the liquid from the flow passage wherein light from a light source is incident from one side near the flat light-transmission plate and emits from the other side near the flat light-transmission plate, wherein a first optical aperture is disposed in front of the flat light-transmission plate at an incident side; a second optical aperture is disposed in rear of the flat light-transmission plate at an emission side; the aperture diameter of the first optical aperture in the direction perpendicular to the axial line of the flow passage is equal to or smaller than the smallest diameter of the flow passage in the direction perpendicular to the axial line of the flow passage, and the aperture diameter of the second optical aperture in the direction perpendicular to the axial line of the flow passage is equal to or larger than that of the first optical aperture.
An optical absorbance meter including a flow passage for liquid to be tested, each end of which is closed with a respective first and second closing member, an introducing path for introducing liquid to the flow passage and a discharging path for discharging the liquid from the flow passages wherein light from a light source is incident from one side near the first closing member and emits from the other side near the second closing member, the optical absorbance meter comprising:
An optical absorbance meter including a constant cross-section flow passage for liquid to be tested, each end of which is closed with a respective first and second closing member, an introducing path for introducing liquid to the flow passage and a discharging path for discharging the liquid from the flow passage, wherein light from a light source is incident from one side near the first closing member and emits from the other side near the second closing member, the optical absorbance meter comprising:
Dependencies are inferred from the claim text.