Optical filters and imaging devices

Abstract

To provide an infrared cut filter including a resin film having high adhesion to an absorption glass substrate consisting of phosphate based glass or fluorophosphate glass.SOLUTION: An optical filter includes a resin film through a bonding layer having a layer structure including a Si atom, and one or more kinds selected from a Ti atom, a Zr atom and an Al atom to an absorption glass substrate consisting of phosphate based glass or fluorophosphate based glass, or an optical filter includes a resin film including a Si atom, and one or more kinds selected from a Ti atom, a Zr atom and an Al atom to the absorption glass substrate consisting of phosphate based glass or fluorophosphate based glass.SELECTED DRAWING: None

Claims

1. An absorption glass substrate made of phosphate glass or phthalate glass, As a resin film containing M-O-Si bonds (where M is one or more atoms selected from Ti, Zr, and Al atoms), The following general formula (III) M{OSi(OR 7 ) (OR 8 ) (OR 9 )} n (III) (However, M is a Ti atom, a Zr atom, or an Al atom; R7, R8, and R9 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, which may be the same or different from each other; n is 4 when M is a Ti atom or a Zr atom, and 3 when M is an Al atom; and the multiple -OSi(OR7)(OR8)(OR9) groups may be the same or different from each other.) Compounds represented by the following general formula (IV) (Ti k O k-1 ){OSi(OR 10 ) (OR 11 ) (OR 12 )} 2k+2 (IV) (However, R10, R11, and R12 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other; k is a real number between 2 and 15; and the multiple -OSi(OR10)(OR11)(OR12) groups may be the same or different from each other.) A resin film is provided containing hydrolyzed and dehydrated condensate products of one or more coupling agents selected from the compounds represented by [the formula]. An optical filter characterized by the following features.

2. The coupling agent represented by the general formula (III) is the following general formula (V) Si(OR7)(OR8)(OR9)OH(V) (However, R7, R8, and R9 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) A silicon compound represented by the following general formula (VI) Ti(OR13)(OR14)(OR15)(OR16)(VI) (However, R13, R14, R15, and R16 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) General formula (VII) Zr(OR 17 )(OR 18 )(OR 19 )(OR 20 )(VII) (However, R17, R18, R19, and R20 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) and the following general formula (VIII) Al(OR21)(OR22)(OR23)(VIII) (However, R21, R22, and R23 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) One or more metal alkoxides selected from those represented by An optical filter according to claim 1, comprising a reaction product with the above.

3. The optical filter according to claim 1 or claim 2, wherein the resin film further comprises a dehydrated silanol condensate.

4. An absorption glass substrate made of phosphate glass or phthalate glass, wherein the following general formula (V) Si(OR7)(OR8)(OR9)OH(V) (However, R7, R8, and R9 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) A silicon compound represented by 50 mol% or more and less than 100 mol%, and the following general formula (VI) Ti(OR 13 ) (OR 14 )(OR 15) (OR 16 ) (VI) (However, R13, R14, R15, and R16 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) General formula (VII) Zr(OR 17 )(OR 18 )(OR 19 )(OR 20 )(VII) (However, R17, R18, R19, and R20 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) and the following general formula (VIII) Al(OR21)(OR22)(OR23)(VIII) (However, R21, R22, and R23 are linear or branched hydrocarbon groups having 1 to 10 carbon atoms, and may be the same or different from each other.) This coupling agent composition contains a reaction product with one or more metal alkoxides selected from those represented by the formula, in an amount exceeding 0 mol% and not exceeding 50 mol%, and contains hydrolyzed and dehydrated condensed products. The optical filter according to claim 1 or claim 2, further comprising a resin film.

5. The optical filter according to claim 4, wherein the coupling agent composition comprises a reaction product of a silicon compound represented by general formula (V) in an amount of more than 80 mol% and less than 100 mol%, and one or more metal alkoxides represented by general formulas (VI) to (VIII) in an amount of more than 0 mol% and less than 20 mol%, respectively.

6. The optical filter according to claim 4, wherein the coupling agent composition comprises a reaction product of 85 to 94 mol% of a silicon compound represented by general formula (V) and 6 to 15 mol% of one or more metal alkoxides represented by general formulas (VI) to (VIII).

7. An imaging device comprising a solid-state image sensor, an imaging lens, and an optical filter according to any one of claims 1 to 6.

Images