Patent ID: 7501639

Claim:
Optical device including a cavity for which at least part is ellipsoidal with a first focus and a second focus, the device including means of presenting a medium containing components to be analysed in the cavity at the first focus, the device also including means of transporting an excitation light beam in the cavity along a path also passing through the first focus to illuminate said medium at the first focus, said ellipsoidal part of the cavity ( 2 , 32 ) including a wall reflecting light emitted by said medium in response to the excitation light beam, the device including means of collecting said emitted light at the second focus, wherein the means used to present said medium are capable of making the medium circulate along a path passing through the first focus, wherein the angle between the path of the means used to circulate the medium and the path of the means used to transport an excitation beam is less than 90° at the first focus, and wherein the means used to circulate the medium include a transparent tube, at least at the first focus.