Birefringent RM lens obtainable from a polymerizable liquid crystalline medium consisting of a polymerizable liquid crystalline component comprising at least one polymerizable mesogenic compound of formula I, P-Sp-(A 1 -Z 1) m1 -A 2 -C≡C-A 3 -(Z 1 -A 1) m2 -R I wherein P is a polymerizable group, preferably an acryl, methacryl, vinyl, vinyloxy, propenyl ether, epoxy, oxetane or styrene group, Sp is a spacer group or a single bond, A 1 is, in case of multiple occurrence independently of one another, selected from carbocylic, heterocyclic, aromatic or heteroaromatic groups, which are optionally substituted by one or more groups L, A 2 and A 3 are independently of each other selected from 1,4-phenylene or naphthalene-2,6-diyl, wherein one or more CH groups may be replaced by N, and which are optionally substituted by one or more groups L, Z 1 is in case of multiple occurrence independently of one another selected from -O-, -S-, -CO-, -COO-, -OCO-,-O-COO-, -CO-NR 0 -, -NR 0 -CO-, -NR 0 -CO-NR 0 -, -OCH 2 -, -CH 2 O-, -SCH 2 -, -CH 2 S-, -CF 2 O-, -OCF 2 -, -CF 2 S-,-SCF 2 -, -CH 2 CH 2 -, -(CH 2) 3 -, -(CH 2) 4 -, -CF 2 CH 2 -,-CH 2 CF 2 -, -CF 2 CF 2 -, -CH=CH-, -CY 1 =CY 2 -, -CH=N-,-N=CH-, -N=N-, -CH=CR 0 -, -C≡C-, -CH=CH-COO-,-OCO-CH=CH-, CR 0 R 00 or a single bond, L is in case of multiple occurrence independently of one another selected from P-Sp-, F, Cl, Br, I, -CN, -NO 2,-NCO, -NCS, -OCN, -SCN, -C(=O)NR 0 R 00, -C(=O)X,-C(=O)OR 0, -C(=O)R 0, -NR 0 R 00, -OH, -SF 5, optionally substituted silyl, aryl or heteroaryl with 1 to 12, preferably 1 to 6 C atoms, and straight chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 12, preferably 1 to 6 C atoms, wherein one or more H atoms are optionally replaced by F or Cl, wherein X is halogen, R is H, alkyl, alkoxy, thioalkyl, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 20 C atoms more, preferably 1 to 15 C atoms which are optionally fluorinated, or is Y 0 or P-Sp-, Y° is F, Cl, CN, NO 2, OCH 3, OCN, SCN, optionally fluorinated alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 4 C atoms, or mono- oligo- or polyfluorinated alkyl or alkoxy with 1 to 4 C atoms, preferably F, Cl, CN, NO 2, OCH 3, or mono- oligo- or polyfluorinated alkyl or alkoxy with 1 to 4 C atoms, Y 1 and Y 2 independently of each other denote H, F, Cl or CN, R° and R 00 are independently of each other H or alkyl with 1 to 12 C-atoms, m1 and m2 are independently of each other 0, 1, 2, 3 or 4, wherein preferably, in case m1 and m2 are 0, one or both of A 2 and A 3 denote 1,4-phenylene that is at least monosubstituted by L, or optionally substituted naphthalene-2,6-diyl, in the range from 10 to 40 %by weight of the total medium, and at most 5 % by weight of the total medium of a non-mesogenic component comprising compounds that are selected from one or more mono-, di- or multireactive polymerizable non-mesogenic compounds, stabilizers and photoinitiators P is a polymerizable group, preferably an acryl, methacryl, vinyl, vinyloxy, propenyl ether, epoxy, oxetane or styrene group, Sp is a spacer group or a single bond, A 1 is, in case of multiple occurrence independently of one another, selected from carbocylic, heterocyclic, aromatic or heteroaromatic groups, which are optionally substituted by one or more groups L, A 2 and A 3 are independently of each other selected from 1,4-phenylene or naphthalene-2,6-diyl, wherein one or more CH groups may be replaced by N, and which are optionally substituted by one or more groups L, Z 1 is in case of multiple occurrence independently of one another selected from -O-, -S-, -CO-, -COO-, -OCO-,-O-COO-, -CO-NR 0 -, -NR 0 -CO-, -NR 0 -CO-NR 0 -, -OCH 2 -, -CH 2 O-, -SCH 2 -, -CH 2 S-, -CF 2 O-, -OCF 2 -, -CF 2 S-,-SCF 2 -, -CH 2 CH 2 -, -(CH 2) 3 -, -(CH 2) 4 -, -CF 2 CH 2 -,-CH 2 CF 2 -, -CF 2 CF 2 -, -CH=CH-, -CY 1 =CY 2 -, -CH=N-,-N=CH-, -N=N-, -CH=CR 0 -, -C≡C-, -CH=CH-COO-,-OCO-CH=CH-, CR 0 R 00 or a single bond, L is in case of multiple occurrence independently of one another selected from P-Sp-, F, Cl, Br, I, -CN, -NO 2,-NCO, -NCS, -OCN, -SCN, -C(=O)NR 0 R 00, -C(=O)X,-C(=O)OR 0, -C(=O)R 0, -NR 0 R 00, -OH, -SF 5, optionally substituted silyl, aryl or heteroaryl with 1 to 12, preferably 1 to 6 C atoms, and straight chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 12, preferably 1 to 6 C atoms, wherein one or more H atoms are optionally replaced by F or Cl, wherein X is halogen, R is H, alkyl, alkoxy, thioalkyl, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 20 C atoms more, preferably 1 to 15 C atoms which are optionally fluorinated, or is Y 0 or P-Sp-, Y° is F, Cl, CN, NO 2, OCH 3, OCN, SCN, optionally fluorinated alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 4 C atoms, or mono- oligo- or polyfluorinated alkyl or alkoxy with 1 to 4 C atoms, preferably F, Cl, CN, NO 2, OCH 3, or mono- oligo- or polyfluorinated alkyl or alkoxy with 1 to 4 C atoms, Y 1 and Y 2 independently of each other denote H, F, Cl or CN, R° and R 00 are independently of each other H or alkyl with 1 to 12 C-atoms, m1 and m2 are independently of each other 0, 1, 2, 3 or 4, wherein preferably, in case m1 and m2 are 0, one or both of A 2 and A 3 denote 1,4-phenylene that is at least monosubstituted by L, or optionally substituted naphthalene-2,6-diyl, in the range from 10 to 40 %by weight of the total medium,