An optical system for guiding light from an interrogation zone to a detector system. The optical system includes an optical device, a first waveguide, and a second waveguide. The optical device is preferably adapted to collect and partition light into a first channel and a second channel of substantially similar light from a substantially singular orientation of the interrogation zone. The first waveguide is preferably adapted to guide the first channel from the optical device to a detector system without substantial interruption. Likewise, the second waveguide is preferably adapted to guide the second channel from the optical device to a detector system without substantial interruption. Preferably, the light of the first channel can be filtered without affecting the light of the second channel, and the light of the second channel can be filtered without affecting the light of the first channel.