Diffraction grating
First Claim
1. A diffraction grating comprising:
- a substrate and a resin layer having a repetitive pattern formed on the substrate, wherein said resin layer comprises a cured product of a photocurable resin composition comprising;
(i) 25-45 wt. % of (A) a polyfunctional urethane-modified polyester (meth)acrylate comprising a polyester oligomer and a plurality of (meth)acryloyl groups bonded to the polyester oligomer via a urethane group and having a number-average molecular weight of at least 800,(ii) 31-70 wt. % of (B) a polyfunctional (meth)acrylate having a number-average molecular weight of less than 650,(iii) 5-44 wt. % of (C) a monofunctional (meth) acrylate, and(iv) (D) a photopolymerization initiator.
1 Assignment
0 Petitions
Accused Products
Abstract
A diffraction grating is constituted by a substrate and a resin layer having a repetitive pattern formed on the substrate. The resin layer is characterized by showing a Young'"'"'s modulus at 100° C. which is at least 2% of that at 20° C. The resin layer may be obtained by curing a photocurable resin composition, including: (A) a polyfunctional urethane-modified polyester (meth)acrylate comprising a polyester oligomer and a plurality of (meth)cryloyl groups bonded to the polyester oligomer via a urethane group, and having a number-average molecular weight of at least 700, (B) a polyfunctional (meth)acrylate having a number-average molecular weight of less than 700, (C) a monofunctional (meth)acrylate, and (D) a photopolymerization initiator.
-
Citations
4 Claims
-
1. A diffraction grating comprising:
a substrate and a resin layer having a repetitive pattern formed on the substrate, wherein said resin layer comprises a cured product of a photocurable resin composition comprising; (i) 25-45 wt. % of (A) a polyfunctional urethane-modified polyester (meth)acrylate comprising a polyester oligomer and a plurality of (meth)acryloyl groups bonded to the polyester oligomer via a urethane group and having a number-average molecular weight of at least 800, (ii) 31-70 wt. % of (B) a polyfunctional (meth)acrylate having a number-average molecular weight of less than 650, (iii) 5-44 wt. % of (C) a monofunctional (meth) acrylate, and (iv) (D) a photopolymerization initiator. - View Dependent Claims (2, 3, 4)
Specification