Patent ID: 11874161
Assignee: ASAHI KASEI MICRODEVICES CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 3:
4. An optical concentration measurement device comprising:
a light source;
a light receiving unit configured to have a rectangular light receiving surface having uniform sensitivity and output a single detection signal representing intensity of received light; and
a light guiding unit configured to guide light emitted by the light source to the light receiving unit,
wherein
a shape of light on the rectangular light receiving surface, the light being radiated on the light receiving surface, is rectangular,
the optical concentration measurement device measures concentration of an object to be measured existing in a light path formed by the light guiding unit, based on the detection signal output from the light receiving unit, and
the light guiding unit guides light in such a way that area of the light on the rectangular light receiving surface is twice or more area of the rectangular light receiving surface.