An optical resin film is provided and fulfills the following formulae to concerning retardations and is formed by using a polymer or {HEAD ~ a copolymer} of {TAIL ~ a cycloolefin compound}: 
An optical resin film is provided and fulfills the following formulae to concerning retardations and is formed by using a polymer or { HEAD ~ a copolymer } of { TAIL ~ a cycloolefin compound } :
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH