TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compounds: The polyisocyanate compound is diisocyanate compound, and the (meth)acrylic type compound is hydroxyl-group-containing (meth)acrylic type compound. The polyisocyanate compound has an isocyanate group content of 20-60 wt.% or 1-20 wt.%, and is chosen from aliphatic diisocyanate, alicyclic diisocyanate, aliphatic aromatic diisocyanate, and aromatic diisocyanate. The diol compound is alkanediol and/or polyether type diol compound having a number average molecular weight of 200-5000, preferably 2-10C alkanediol or polyoxy 2-6C alkyleneglycol having a number average molecular weight of 250-2000.    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: The urethane (meth)acrylate compound is obtained by reacting compound (1) with the reaction material of polyisocyanate compound and (meth)acrylic type compound. Preferred Compounds: The urethane (meth)acrylate has 3 or more (meth)acryloyl groups. The urethane (meth)acrylate is 9,9-bis(di(hydroxy(poly)2-4C alkoxy)phenyl)fluorene and/or 9,9-bis(tri(hydroxy(poly)2-4C alkoxy)phenyl)fluorene. The polyisocyanate compound is a urethane pre-polymer having an isocyanate group at both terminals, obtained by reacting a diol compound and a diisocyanate compound. The urethane (meth)acrylate compound is of formula (2).J=(CH2=CR4-CO-X-)q-(E)p-Y'-CO-NH-A-NH-CO-;R4=H or methyl;A=residue of polyisocyanate compound;X,Y'=ether group;E=coupling group, preferably 2-10C alkylene;p=0 or 1;andq=1 or more.At least two of (r+s) J groups are (CH2=CR4-CO-X)-. EXAMPLE - Isophorone diisocyanate (in g) (9.05) and 1,4-dioxane (37.17) were taken in a flask. 2-Hydroxyethylacrylate (4.88) was added, followed by addition of di-n-butyltin dilaurate (1.69) diluted with 1,4-dioxane to 1 wt.%. The flask was substituted with argon, and the contents were reacted at room temperature for 53 hours with stirring. A reaction liquid containing pre-polymer with an isocyanate content of 12.4% was obtained. 9,9-Bis(3,4-di(2-hydroxyethoxy)phenyl)fluorene (5.56) was added to a flask, followed by addition of 1,4-dioxane (50.68) and heating to 80 degrees C. The fluorene compound was dissolved, and the reaction liquid was added to the pre-polymer. Di-n-butyltin dilaurate (1.54) diluted with 1,4-dioxane to 1 wt.% was added. The flask was argon substituted, and the contents were reacted at room temperature for 120 hours with stirring. Hydroquinone (10.6 mg) was added after reaction completion. The solvent was removed at reduced pressure, to obtain a urethane (meth)acrylate having residual solvent content of 15.7%. A cured film obtained using the compound had a refractive index of 1.515, a pencil hardness of 3H, a glass transition temperature of 30 degrees C, a tensile strength of 11.2 MPa, and an elasticity modulus of 11 MPa.