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