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US 2019/0101672 A1Published application
Optical filter and apparatus using optical filter
AssigneeJsr Corporation
InventorsTatsuya KASAI, Katsuya NAGAYA, Toshihiro OTSUKI
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Abstract
The object of the present invention is to provide an optical filter which has not only a high visible light transmittance, but also high light cut characteristics in the near-infrared wavelength region, and which is excellent in heat resistance. The optical filter of the present invention comprises a base material comprising a compound (S) having an absorption maximum in the region of 600 to 1150 nm and an antioxidant (P) having at least one phosphorus atom in a molecule, and a dielectric multilayer film formed on at least one surface of the base material.
Claims11
1:
- An optical filter, comprising:
- a base material comprising a compound having an absorption maximum in a region of from 600 to 1150 nm and an antioxidant having at least one phosphorus atom in a molecule;
- and
- a dielectric multilayer film formed on at least one surface of the base material.
1 more element
2:
- The optical filter according to claim 1, wherein the base material further comprises a resin.
3:
- The optical filter according to claim 2, wherein the resin is a transparent resin.
4:
- The optical filter according to claim 3, wherein a content of the antioxidant is in a range of from 0.1 to 3.0 parts by weight based on 100 parts by weight of the transparent resin.
5:
- The optical filter according to claim 1 wherein a melting point of the antioxidant is from 100 to 250° C.
6:
- The optical filter according to claim 1, wherein the antioxidant is a compound having a structure represented by formula (p):
- wherein * represents a bond.
7:
- The optical filter according to claim 1, wherein the antioxidant is at least one selected from compounds represented by formulae (I) to (III):
- wherein R1 to R5 are each independently a hydrogen atom;
- a halogen atom;
- a substituted or unsubstituted hydrocarbon group of 1 to 30 carbon atoms, which optionally has a linking group containing an oxygen atom, a sulfur atom, a nitrogen atom or a silicon atom;
- or a polar group, n is an integer of 0 to 5, and m is 0 or 1.
2 more elements
8:
- The optical filter according to claim 3, wherein the transparent resin is at least one resin selected from the group consisting of a cyclic (poly)olefin-based resin, an aromatic polyether-based resin, a polyimide-based resin, a fluorene polycarbonate-based resin, a fluorene polyester-based resin, a polycarbonate-based resin, a polyamide-based resin, a polyarylate-based resin, a polysulfone-based resin, a polyether sulfone-based resin, a polyparaphenylene-based resin, a polyamideimide-based resin, a polyethylene naphthalate-based resin, a fluorinated aromatic polymer-based resin, a (modified) acrylic-based resin, an epoxy-based resin, an allyl ester-based curing type resin, a silsesquioxane-based ultraviolet curing resin, an acrylic-based ultraviolet curing resin and a vinyl-based ultraviolet curing resin.
9:
- The optical filter according to claim 1, which selectively transmits visible rays and a part of near-infrared rays.
10:
- A solid-state image pickup device equipped with the optical filter according to claim 1.
11:
- A camera module equipped with the optical filter according to claim 1.