Method for reducing near-infrared light exposure by a laminate film structure on an eyewear
The present disclosure relates to a laminate film structure for a wearer, intended for reflecting and absorbing near-infrared light, comprising a near-infrared reflection layer reflecting the near-infrared light that is incident on the near-infrared reflection layer, and a near-infrared absorption layer disposed between an eye of the wearer and the near-infrared reflection layer, the near-infrared reflection layer being disposed on the near-infrared absorption layer and the near-infrared absorption layer absorbing the near-infrared light.
1 . A laminate film structure for a wearer, intended for reflecting and absorbing near-infrared light, comprising:
a near-infrared reflection layer reflecting the near-infrared light that is incident on the near-infrared reflection layer; and
a near-infrared absorption layer disposed between an eye of the wearer and the near-infrared reflection layer, the near-infrared reflection layer being disposed on the near-infrared absorption layer and the near-infrared absorption layer absorbing the near-infrared light,
wherein the near-infrared absorption layer absorbs a reflected near-infrared light, the reflected near-infrared light first passing through the near-infrared absorption layer and then reflecting from the backside of the near-infrared reflection layer.
2 . The laminate film structure according to claim 1 , wherein the near-infrared absorption layer is a thermoplastic film including thermoplastic resin and one or more near-infrared light filters.
3 . The laminate film structure according to claim 1 , wherein each of the one or more near-infrared light filters has a different concentration and a different absorption range between 780 nm and 2000 nm.
4 . The laminate film structure according to claim 1 , wherein a first near-infrared light absorption layer of the one or more near-infrared light filters has at least one near-infrared light absorption peak within at least one of the following ranges: 780-880 nm, 960-1080 nm, 1180-1320 nm, and 1480-1760 nm, and a percentage of reflection of the near-infrared light from the first near-infrared light absorption layer is less than 9%.
5 . The laminate film structure according to claim 1 , wherein the near-infrared reflection layer includes: a thermoplastic film with a silver nano-particle coating, or a multilayer infrared reflecting film, or a thermoplastic film with a nano-ceramic coating, or a thermoplastic film with an anti-reflection coating, or a thermoplastic film with a mirror coating.
6 . The laminate film structure according to claim 1 , wherein near-infrared light transmission of the near-infrared reflection layer is less than 30% and near-infrared light reflection of the near-infrared reflection layer is larger than 31%.
7 . The laminate film structure according to claim 1 , wherein a near-infrared light reflection peak of the near-infrared reflection layer is between 780 nm and 2000 nm.
8 . The laminate film structure according to claim 1 , wherein at least one near-infrared light absorption peak of the near-infrared absorption layer substantially matches at least one near-infrared light reflection peak of the near-infrared reflection layer.
9 . The laminate film structure according to claim 1 , wherein the near-infrared reflection layer is an outer layer of the laminate film structure.
10 . The laminate film structure according to claim 1 , wherein an ophthalmic lens is disposed between the near-infrared absorption layer and the eye of the wearer.
11 . The laminate film structure according to claim 10 , wherein the near-infrared absorption layer is integrated with the ophthalmic lens.
12 . The laminate film structure according to claim 1 , wherein the near-infrared absorption layer absorbs a transmitted near-infrared light, the transmitted near-infrared light first passing through the near-infrared reflection layer.
13 . A method of reducing near-infrared light exposure to an eye by a laminate film structure according to claim 1 on an eyewear, comprising:
absorbing near-infrared light by the near-infrared absorption layer of the laminate film structure, the near-infrared absorption layer being located between the eye and the near-infrared reflection layer; and
reflecting the near-infrared light by the near-infrared reflection layer of the laminate film structure, the near-infrared reflection layer located on the first near-infrared absorption layer,
wherein the near-infrared absorption layer absorbs a reflected near-infrared light, the reflected near-infrared light first passing through the near-infrared absorption layer and then reflecting from the backside of the near-infrared reflection layer.
14 . An eyewear structure for protecting an eye from near-infrared light, comprising:
an ophthalmic lens;
a near-infrared absorption layer disposed on the ophthalmic lens, the near-infrared absorption layer absorbing the near-infrared light; and
a near-infrared reflection layer disposed on the near-infrared absorption layer, the near-infrared reflection layer reflecting the near-infrared light,
wherein the ophthalmic lens is disposed between the eye and the near-infrared absorption layer, and
wherein the near-infrared absorption layer is disposed between the ophthalmic lens and the near-infrared reflection layer.
15 . The eyewear structure according to claim 14 , wherein a total near-infrared light transmission through the eyewear structure is less than a total visible light transmission through the eyewear structure.