{TAIL ~ An imaging unit} is arranged in front of the photosensor array such that it maps {HEAD ~ an image} of said array of LEDs on said photosensor array 
{ TAIL ~ An imaging unit } is arranged in front of the photosensor array such that it maps { HEAD ~ an image } of said array of LEDs on said photosensor array
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH