The product has greatly improved wear resistance for severe abrasive environments and comprises a substantially optically transparent substrate, a chemicaly vapor deposited first interlayer bonded to the substrate and {HEAD ~ a chemically vapor deposited outer layer} of {TAIL ~ substantially optically transparent diamond} like carbon bonded to the interlayer and away from the substrate 
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The product has greatly improved wear resistance for severe abrasive environments and comprises a substantially optically transparent substrate , a chemicaly vapor deposited first interlayer bonded to the substrate and { HEAD ~ a chemically vapor deposited outer layer } of { TAIL ~ substantially optically transparent diamond } like carbon bonded to the interlayer and away from the substrate
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH