A transparent chip substrate or appropriate holes within the substrate would allow the external optical devices to be positioned within {HEAD ~ the semispherical volume} beneath {TAIL ~ the chip} 
beneath
A transparent chip substrate or appropriate holes within the substrate would allow the external optical devices to be positioned within { HEAD ~ the semispherical volume } beneath { TAIL ~ the chip }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL