NOVELTY - Chiral reactive mesogen mixture comprises component (A) containing one or more ester-type compound (I), component (B) containing one or more reactive mesogens having 2 or more polymerizable groups containing ester-type compound (II), and component (C) containing binaphthalenyl-type compound (III).    USE - Chiral reactive mesogen mixture is used for electro-optical display, liquid crystal display, optical films, polarizers, compensators, beam splitters, reflective films, alignment layers, color filters, holographic elements, hot stamping foils, colored images, liquid crystal pigments, adhesives, non-linear optic devices, optical information storage devices, electronic devices, organic semiconductors, organic field effect transistors , integrated circuits , thin film transistor, radio frequency identification tags, organic light emitting diodes, organic light emitting transistors, electroluminescent displays, organic photovoltaic devices, organic solar cells, organic laser diodes, organic integrated circuits, lighting devices, sensor devices, electrode materials, photoconductors, photodetectors, electrophotographic recording devices, capacitors, charge injection layers, Schottky diodes, planarizing layers, antistatic films, conducting substrates, conducting patterns, photoconductors, electrophotographic applications, electrophotographic recording, organic memory devices, biosensors, biochips, optoelectronic devices, writing re-writing data storage systems, and cameras (all claimed).    ADVANTAGE - The chiral reactive mesogen mixture has excellent transmittance.    DETAILED DESCRIPTION - Chiral reactive mesogen mixture comprises component (A) containing one or more ester-type compound of formula (I), component (B) containing one or more reactive mesogens having 2 or more polymerizable groups containing ester-type compound of formula (II), and component (C) containing binaphthalenyl-type compound of formula (III).    P'=polymerizable group;    Sp=spacer group or single bond;    A1,A2=1,4-phenylene or naphthalene-2,6-diyl, in which one or more CH groups are optionally substituted by N, and groups L, Z1 and Z2;    R1=P'-Sp-, fluoro, chloro, -CN, -NO2 -NCO, -NCS, -OCN, - SCN, -SF5 or linear or branched 1-12C alkyl atoms, in which one or more CH2 groups are optionally substituted by -O-, -S-, -CO-, -CS- or NR0, such that O and/or S are not directly linked with each other, and more than one H atoms are optionally substituted by fluoro or chloro;    L=silyl, aryl or 1-6C heteroaryl (all optionally substituted), P'-Sp-, fluoro, chloro, bromo, iodo, -CN, -NO2, NCO, -NCS, -OCN, -SCN, -C(=O)NR0R00, -C(=O)X, -C(=O)OR0, -C(=O)R0, -NR0R00, -OH, -SF5, linear or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or 1-6C alkoxycarbonyloxy, in which one or more H atoms are optionally substituted by fluoro or chloro;    X=halo,R0,R00=H or 1-12C alkyl;    r=0, 1, 2, 3 or 4, preferably 0 or 1;    m1,m2=0 or 1;    R2=H or P0;    P0=acryl, methacryl, oxetane, epoxy, vinyl, vinyloxy, propenyl ether or styrene;    A0,B0=1,4-phenylene optionally substituted by group L, or trans-1,4-cyclohexylene;    X1,X2,Z1,Z2=-O-, -COO-, -OCO-, - O-CO-O- or single bond;    Z3=-COO-, -OCO-, -O-CO-O-, -OCH2-, -CH2O-, - CF2O-, -OCF2-, -CH2CH2-, -(CH2)4-, -CF2CH2-, - CH2CF2-, -CF2CF2-, -CC-, -CH=CH-, -CH=CH-COO-, -OCO-CH=CH- or single bond;    t=0, 1, 2 or 3;    u=0, 1 or 2;    x=0 or 1-12;and    z=0 or 1.    Naphthalene rings are substituted by one or more L groups. INDEPENDENT CLAIMS are included for the following:    (1) Anisotropic polymer or polymer film, which is obtained by polymerizing reactive mesogen mixture; and    (2) use of reactive mesogen mixture.