Patent ID: 7535570

Claim:
A one dimensional measuring unit, comprising: an elongate dielectric block, which is transparent with respect to a light beam; a thin film layer, formed on a flat surface of the dielectric block; and a flow path forming member, which is in close contact with the thin film layer of the dielectric block, for forming a plurality of flow paths in the longitudinal direction of the dielectric block on the thin film layer, with intervals therebetween; each of the plurality of flow paths being constituted by: a measurement path, formed on the thin film layer; a supply path that extends from the entrance of the flow path forming member to the measurement path; and a discharge path that extends from the measurement path to the exit of the flow path forming member; a linear guide groove for conveyance being formed in the bottom surface of the dielectric block in the longitudinal direction thereof; and positioning abutment surfaces being formed on the side surfaces and a first end surface of the dielectric block.