Patent ID: 8873055

Claim:
A system for optical detection comprising: a light source having a first side and a second side; a first optical filter having a first side and a second side, the first side of the first optical filter being substantially close to the second side of the light source; a collimation and/or guidance optics having a first side and a second side, the first side of the collimation and/or guidance optics being substantially close to the second side of the first optical filter; a second optical filter having a first side and a second side, the first side of the second optical filter being substantially close to the second side of the collimation and/or guidance optics; an optics to control stray light having a first side and a second side, the first side of the optics to control stray light being substantially close to the second side of the second optical filter; one or more absorbing layers attached to the second side of the optics to control stray light, wherein the one or more absorbing layers being partially covering the second side of the optics to control stray light, thus allowing the light from the light source to pass through; a chamber containing a sample to be illuminated, the chamber being contained in a cartridge comprising a reflector attached to a first side of the cartridge and a reflective layer attached to bottom of the cartridge, wherein the light emitted by the sample are reflected back to the sample by the reflective layer and guided by the reflector towards a second side of the cartridge; and a detector having a first side and a second side, the first side of the detector being substantially close to the second side of the cartridge, wherein the detector detects the light emitted by the sample.