Patent ID: 7492454

Claim:
Optical light collection system, this system being intended to collect light emitted by at least one light source and to focus the collected light onto at least one light detection device, this system being characterized in that it comprises at least two mirrors, namely a first mirror and a second mirror, and in that the source is a luminescent discharge lamp, the first mirror being capable of collecting light emitted by the light source and making the collected light converge onto the second mirror, this second mirror being capable of making the light that it receives from the first mirror converge onto the light detection device, this system thus amplifying the light flux, being achromatic and having a low absorption for light, including for the ultraviolet radiation, and in that the system is provided with: a chamber that is opaque to all light, including ultraviolet radiation, and in which the light source, the light detection device and the mirrors are placed, and means of creating a vacuum in this chamber or filling it with a gas that is transparent to ultraviolet radiation, wherein the first and second mirrors have the same axis, this same axis forming the optical axis of the system, and the respective focal points of the first and second mirrors are located on this optical axis, and wherein the first mirror comprises a central drilling that is capable of allowing light focused by the second mirror to pass towards the light detection device.