Patent ID: 11960056
Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. An optical lens formed by integrally molding a lens part that is an optically effective portion and has a light incidence/emission surface, and a lens edge part that is an optically ineffective portion and has a surface thereof except the light incidence/emission surface, wherein:
the lens edge part includes a non-transparent region in part or all thereof;
the lens part and the lens edge part include a thermoplastic resin; and
the non-transparent region in the lens edge part comprises 0.1 to 5% by mass in total of one or more of a black dye and a black pigment wherein the thermoplastic resin included in the lens part includes at least one selected from the group consisting of: a structural unit represented by formula (1):, , wherein in formula (1),
R1 and R2 each independently represent a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C1-6 alkyl group; a C6-20 aryl group which may contain a heterocyclic atom selected from among O, N and S; a C2-6 alkenyl group; a C1-6 alkoxy group; or a C7-17 aralkyl group, and
a and b each independently represent an integer of 0 to 5; a structural unit represented by formula (2):, , wherein in formula (2),
R3 to R6 each independently represent a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C1-6 alkyl group; a C6-20 aryl group which may contain a heterocyclic atom selected from among O, N and S; a C2-6 alkenyl group; a C1-6 alkoxy group; or a C7-17 aralkyl group,
c and d each independently represent an integer of 0 to 6, and e and f each independently represent an integer of 0 to 4; a structural unit represented by formula (3):, , wherein in formula (3),
R7 to R10 each independently represent a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C1-6 alkyl group; a C6-20 aryl group which may contain a heterocyclic atom selected from among O, N and S; a C2-6 alkenyl group; a C1-6 alkoxy group; or a C7-17 aralkyl group, and
g to j each independently represent an integer of 0 to 4; a structural unit represented by formula (4):, , wherein in formula (4), R represents a hydrogen atom or a C1-5 alkyl group; and a structural unit represented by formula (5):, , wherein in formula (5), A represents a C1-5 alkylene group, p is 0 or 1, K1 represents a hydrogen atom or a C1-5 alkyl group, K2 represents a hydrogen atom, a C1-5 alkyl group or a C6-20 aryl group, Z represents a carboxyl group, an alkoxycarbonyl group, a cycloalkyloxycarbonyl group, an aryloxycarbonyl group, a hydroxyalkylcarbonyl group, a glycidyloxycarbonyl group, a cyano group or an amide group, and q is 0 or 1.