{HEAD ~ The support member} may provide {TAIL ~ a compliant fluid seal} and allow the edges of the optical surfaces to pivot, reducing spherical and other aberrations 
provide
{ HEAD ~ The support member } may provide { TAIL ~ a compliant fluid seal } and allow the edges of the optical surfaces to pivot , reducing spherical and other aberrations
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH