Curable composition for lens, lens and optical device

Patent metadata

Field	Value
Publication number	US-2016311968-A1
Application number	US-201415103417-A
Country	US
Kind code	A1
Filing date	Dec 19, 2014
Priority date	Dec 26, 2013
Publication date	Oct 27, 2016
Grant date	—

Abstract

Provided is a curable composition capable of giving a lens that has excellent transfer accuracy from a mold and offers heat resistance and optical properties at excellent levels. The curable composition according to the present invention for lens formation contains a cycloaliphatic epoxide (A) represented by Formula (a), a cationic-polymerization initiator (B), and a polysiloxane (C) represented by Formula (c). The curable composition contains the polysiloxane (C) in an amount of 0.01% to 5% by weight based on the total amount of the curable composition. The curable composition according to the present invention for lens formation may further contain a siloxane compound (D) containing two or more epoxy groups per molecule.

First claim

1 . A curable composition for lens formation, the curable composition comprising:
a cycloaliphatic epoxide (A) represented by Formula (a); a cationic-polymerization initiator (B); and a polysiloxane (C) represented by Formula (c), the curable composition containing the polysiloxane (C) in an amount of 0.01% to 5% by weight based on the total amount (100% by weight) of the curable composition, Formulae (a) and (c) expressed as follows:

wherein:
R 1 to R 18 are each, identically or differently, selected from hydrogen, halogen, a hydrocarbon group which may contain oxygen or halogen, and optionally substituted alkoxy; and
X is selected from a single bond and a linkage group excluding a siloxane-bond-containing group,

wherein:
R 19 to R 22 each represent, identically or differently in each occurrence, a group selected from hydrogen, alkyl, haloalkyl, aryl, aralkyl, alkoxy, acyloxy, and —RNHCOR′, where R is selected from alkylene and alkenylene, and R′ is selected from alkyl and alkenyl; and
m and n each represent, identically or differently, an integer of 1 or more.

2 . The curable composition according to claim 1 for lens formation, further comprising
a siloxane compound (D) containing two or more epoxy groups per molecule.

3 . The curable composition according to claim 1 for lens formation, further comprising
a cationically curable compound containing one or more oxetane groups per molecule, excluding compounds belonging to the cycloaliphatic epoxide (A) and the siloxane compound (D).

4 . The curable composition according to claim 1 for lens formation, further comprising
a cationically curable compound containing one or more glycidyl ether groups per molecule, excluding compounds belonging to the cycloaliphatic epoxide (A) and the siloxane compound (D).

5 . The curable composition according to claim 1 for lens formation,
wherein the curable composition contains the cycloaliphatic epoxide (A) in a content of 5% to 60% by weight based on the total amount (100% by weight) of the curable composition.

6 . The curable composition according to claim 1 for lens formation,
wherein the curable composition is used to form a wafer-level lens.

7 . The curable composition according to claim 1 for lens formation,
wherein the curable composition is used to form a Fresnel lens.

8 . The curable composition according to claim 1 for lens formation,
wherein the curable composition is used to form a lens for camera flash.

9 . A method for producing a lens, the method comprising the steps of:
1) charging the curable composition according to claim 1 for lens formation into a lens-forming mold; and 2) applying light to cure the curable composition.

10 . The method according to claim 9 for producing a lens,
wherein a silicon mold is used as the lens-forming mold.

11 . The method according to claim 9 for producing a lens,
wherein the step 2) comprises applying light at 350 to 450 nm from a UV-LED to cure the curable composition.

12 . The method according to claim 9 for producing a lens,
wherein the step 2) further comprises annealing after the light application.

13 . The method according to claim 9 for producing a lens,
wherein a lens-forming mold having two or more lens patterns is used as the lens-forming mold in the step 1).

14 . The method according to claim 9 for producing a lens,
wherein a lens-forming mold having two or more lens patterns is used as the lens-forming mold in the step 1),
wherein an article obtained from the step 1) is subjected to the step 2) to give a coupled lens assembly including two or more lenses coupled to each other, and
wherein the coupled lens assembly is cut to give lenses.

15 . A lens obtained by the method according to claim 13 and comprising two or more lenses coupled to each other.

16 . A lens produced by the method according to claim 9 .

17 . The lens according to claim 15 ,
which is a wafer-level lens.

18 . The lens according to claim 15 ,
which is a Fresnel lens.

19 . The lens according to claim 15 ,
which is a lens for camera flash.

20 . An optical device comprising
the lens according to claim 16 .

Assignees

• Daicel Corp

Inventors

• Fujikawa Takeshi
• Kubo Takashi

Classifications

• B29D11/00269

  Fresnel lenses · CPC title

• B29D11/00307

  Producing lens wafers · CPC title

• B29D11/00298

  Producing lens arrays · CPC title

• C08G59/24

  carbocyclic · CPC title

• G02B1/041

  Lenses · CPC title