An apparatus for cavity enhanced optical detection comprising: a) a source of optical radiation b) a resonant optical cavity which provides a round trip path for said optical radiation the cavity comprising: i) a plurality of mirrors, the first mirror being an input mirror which receives the optical...http://www.google.ca/patents/US20050094158?utm_source=gb-gplus-sharePatent US20050094158 - Flow cell for optical detection having reduced sensitivity to refractive index variation
