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[04211 As seen from Table 3 and Table 3-2, it was con› firmed that the wet heat resistance was excellent with the optical film of the embodiment of the present invention. 

[0422] Above all, it was confirmed that in a case where (A)-(B) is 21.0 or more, the effects are more excellent. 

[0423] Furthermore, it was confirmed that even in a case where HB(C$_{6}$F 5 ) 4 was used instead of the additive B-1 of Example 1, the same extent of effects as in Example 1 occurs. 

[0424] In addition, even in a case where the amount of the additive to be used was adjusted to 2.01 % by mole with respect to the liquid crystal compound in each of Examples 2 and 18, the same good results as that with 0.67% by mole was obtained. 

[0425] lOA, 10B optical film 

[0426] 12 alignment layer 

[0427] 14 retardation layer 

[0428] 16 support 

What is claimed is: 

1. An optical film comprising: 

an alignment layer; and 

a retardation layer which is disposed on the alignment layer and formed using a polymerizable liquid crystal composition including a liquid crystal compound rep› resented by Formula (I), 

## EXPLANATION OF REFERENCES 

wherein at least one of an acid having the pKa of -10.0 or less or a salt of the acid is included in at least one of the alignment layer or the retardation layer, 

<img src='content_image/943001.jpg'>

in Formula (I), D 1 , D 2 , D 3 , and D 4 each independently represent a single bond, ---0-CO-, ---C(=S)O-, ---CR1R2- -CR1R2---CR3R4- -O---CR1R2- ---CR 1 R 2 -O---CR 3 R 4 -, ----C0-0---CR 1 R 2 -: ---0-CO---CR 1 R 2 -, -CR 1 R 2 ---O-CO- CR3R4-, -CR 1 R 2 ---CO-O---CR 3 R 4 -, -NR 1 - CR 2 R 3 -, or ---CO-NR 1 -, provided that at least one of D 1 , D 2 , D 3 , or D 4 represents -O---CO-, 2 3 4 

R1, R , R , and R each independently represent a hydro› gen atom, a fluorine atom, or an alkyl group having 1 to 4 carbon atoms, 1 2 

G and G each independently represent a divalent alicy› clic hydrocarbon group having 5 to 8 carbon atoms which may have a substituent, and one or more of ---CH 2 -’s constituting the alicyclic hydrocarbon group may be substituted with ---0-, -S-, or -NH-, 1 2 

A andA each independently represent a single bond, an aromatic ring having 6 or more carbon atoms, or a cycloalkylene ring having 6 or more carbon atoms, 

