{HEAD ~ Each light modulator} in {TAIL ~ the first subset} of light modulators modulates light along a first axis of reflection, while each light modulator in the second subset of light modulator modulates light along a second axis of reflection 
in
{ HEAD ~ Each light modulator } in { TAIL ~ the first subset } of light modulators modulates light along a first axis of reflection , while each light modulator in the second subset of light modulator modulates light along a second axis of reflection
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH