Biological analysis devices and systems

A biological analysis system, comprising:

• a first element configured to receive excitation light from at least one excitation light source and transmit the excitation light in a first direction;
• a plurality of excitation mirrors in optical communication with the first element and configured to communicate excitation light in a second direction, the second direction being at a reflex angle of greater than 270 degrees to the first direction;
• a plurality of sample receptacles, each sample receptacle being associated with a respective excitation mirror and being positioned to receive light transmitted by the respective excitation mirror along the second direction;
• and
• a plurality of photodetectors, each photodetector being associated with a respective sample receptacle and being configured to receive emission light transmitted in a third direction from the sample receptacle, the third direction being at a reflex angle of greater than 270 degrees to the second direction.

A biological analysis system, comprising:

• a light path;
• and
• a first element configured to receive excitation light beams from at least one excitation light source and transmit the excitation light beams along the light path,
• the light path being arranged so as to communicate excitation light along a first direction to a plurality of excitation mirrors, a first of the plurality of excitation mirrors being separated by a distance from a second of the plurality of excitation mirrors as measured along the first direction,
• the light path being arranged to communicate excitation light along a second direction away from the plurality of excitation mirrors, the second direction being at an angle to the first direction,
• the light path being arranged to communicate light along the second direction to a plurality of sample receptacles comprised in the biological analysis system, each sample receptacle being associated with a respective excitation mirror and being positioned to receive light transmitted along the second direction;
• and
• the light path being arranged to communicate light in a third direction from a sample receptacle to a photodetector associated with that sample receptacle.