Patent ID: 7142305

Claim:
A microchemical system comprising a channel-formed plate-shaped member that is equipped with a channel for containing a sample, an exciting light source that irradiates exciting light onto the sample via a converging lens, a detecting light source that irradiates, via the converging lens, detecting light onto a thermal lens formed within the sample by the irradiated exciting light, and detecting means for detecting the irradiated detecting light via the formed thermal lens, wherein the exciting light source and the detecting light source are connected to the converging lens via an optical fiber for propagating the exciting light and the detecting light to the converging lens, wherein the converging lens is fixed to the channel-formed plate-shaped member, the optical fiber has a joint part capable of disconnecting the exciting light source and the detecting light source from the converging lens, and the detecting means is provided in a position opposite to the converging lens.