Optical member for measuring concentration, concentration measurement unit including the optical member, and fuel cell
First Claim
1. An optical member for measuring a concentration comprising:
- a path through which a substance to be measured passes;
a first optical element including an incident surface on which light for inspection is incident and an emitting surface facing said path;
a second optical element including an incident surface facing said path and an emitting surface from which the light is emitted; and
magnifying means that magnifies a distance between an emitting optical axis of light transmitting through said first optical element, being refracted by the substance to be measured in said path and transmitting through said second optical element, and an incident optical axis of the light for inspection.
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Accused Products
Abstract
An optical member for measuring a concentration, the optical member being capable of measuring with high accuracy from low concentration to high concentration, and the like are provided.
Light (P1) emitted from a light source (P) for inspection is refracted at a boundary surface between an emitting surface (11b) of a first optical element (11) and a substance (7) to be measured, the substance circulating in a path (15), by an angle (θ2) of refraction depending on the concentration (refractive index) of the substance (7) to be measured. Furthermore, when the light is incident on a second optical element (12), the light is refracted to light (P3) parallel to a reference optical axis (O-O). When the light (P3) is emitted from the second optical element (12) to the outside, the light (P3) is further greatly refracted by magnifying means (16) provided on an emitting surface (12b) of the second optical element (12).
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Citations
19 Claims
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1. An optical member for measuring a concentration comprising:
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a path through which a substance to be measured passes;
a first optical element including an incident surface on which light for inspection is incident and an emitting surface facing said path;
a second optical element including an incident surface facing said path and an emitting surface from which the light is emitted; and
magnifying means that magnifies a distance between an emitting optical axis of light transmitting through said first optical element, being refracted by the substance to be measured in said path and transmitting through said second optical element, and an incident optical axis of the light for inspection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical member for measuring a concentration comprising:
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a path through which a substance passes;
a first optical element including a first incident surface on which light for inspection is incident and a first emitting surface facing said path;
a second optical element including a second incident surface facing said path and a second emitting surface from which said light is emitted; and
a third optical element magnifying a distance between an emitting optical axis of the light transmitting through said first optical element, being refracted by said substance in said path and transmitting through said second optical element and an incident optical axis of the light for inspection. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification