Optical lens and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-11960056-B2
Application number	US-201917416730-A
Country	US
Kind code	B2
Filing date	Dec 24, 2019
Priority date	Dec 28, 2018
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

Provided is 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. 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 contains a total of 0.1-5 mass % of one or more of a black dye and a black pigment.

First claim

The invention claimed is:

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),
R 1 and R 2 each independently represent a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C 1-6 alkyl group; a C 6-20 aryl group which may contain a heterocyclic atom selected from among O, N and S; a C 2-6 alkenyl group; a C 1-6 alkoxy group; or a C 7-17 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),
R 3 to R 6 each independently represent a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C 1-6 alkyl group; a C 6-20 aryl group which may contain a heterocyclic atom selected from among O, N and S; a C 2-6 alkenyl group; a C 1-6 alkoxy group; or a C 7-17 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 ),
R 7 to R 10 each independently represent a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C 1-6 alkyl group; a C 6-20 aryl group which may contain a heterocyclic atom selected from among O, N and S; a C 2-6 alkenyl group; a C 1-6 alkoxy group; or a C 7-17 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 C 1-5 alkyl group; and a structural unit represented by formula (5):

wherein in formula (5), A represents a C 1-5 alkylene group, p is 0 or 1, K 1 represents a hydrogen atom or a C 1-5 alkyl group, K 2 represents a hydrogen atom, a C 1-5 alkyl group or a C 6-20 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.

2. The optical lens according to claim 1 , wherein the thermoplastic resin included in the lens part comprises all of the structural unit represented by formula (1), the structural unit represented by formula (2) and the structural unit represented by formula (3).

3. The optical lens according to claim 1 , wherein the lens part and the lens edge part include the same resin.

4. The optical lens according to claim 1 , which is for a smartphone.

5. An optical lens unit comprising the optical lens according to claim 1 .

6. The optical lens unit according to claim 5 , which does not comprise a spacer.

7. A method for producing the optical lens according to claim 1 , which comprises integrally molding the lens part and the lens edge part using both insert molding and two-color molding.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Motegi Atsushi
• Ishihara Kentaro
• NISHIMORI Katsushi
• Ikeda Shinya
• Kato Noriyuki
• Kondo Mitsuteru
• Oshima Kensuke
• Kanda Masahiro
• Suzuki Shoko
• OGATA Tatsunobu
• Suematsu Mitsutake

Classifications

• B29L2011/00

  Optical elements, e.g. lenses, prisms · CPC title

• G02B2003/0093

  characterised by the shape · CPC title

• B29D11/00009

  Production of simple or compound lenses · CPC title

• C08G64/305

  and alcohols · CPC title

• C08G65/34

  from hydroxy compounds or their metallic derivatives {(C08G65/26 takes precedence)} · CPC title