Optical filter and imaging apparatus
AssigneeHoya Corporation
InventorsHaruna Imai, Shinichi Ogawa, Takeshi Yamazaki
Life of this patent
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Abstract
Provided is an optical filter, including an absorbing glass substrate composed of phosphate-based glass or fluorophosphate-based glass; a bonding layer with a single layer structure; and a resin layer, wherein the resin layer is provided on the absorbing glass substrate through the bonding layer, wherein the bonding layer includes a Si atom and one or more selected from a Ti atom, a Zr atom, and an Al atom; or an optical filter, including an absorbing glass substrate composed of phosphate-based glass or fluorophosphate-based glass; and a resin layer, wherein the resin layer includes a Si atom and one or more selected from a Ti atom, a Zr atom, and an Al atom, and is provided on the absorbing glass substrate.
Claims12
An optical filter, comprising:
- an absorbing glass substrate for absorbing ultraviolet light or near infrared light that is composed of a phosphate-based glass or a fluorophosphate-based glass;
- a bonding layer that is provided on the absorbing glass substrate, that has a single layer structure, and that comprises a dehydrated condensate of at least one coupling agent, said coupling agent comprising a silicon compound containing a Si atom and a metal alkoxide containing one or more selected from a Zr atom and an Al atom;
- and
- a resin layer disposed on the bonding layer;
- and
- wherein the bonding layer is 0.01 μm to 0.5 μm in thickness.
An optical filter, comprising:
- an absorbing glass substrate for absorbing ultraviolet light or near infrared light that is composed of a phosphate-based glass or a fluorophosphate-based glass;
- a bonding layer that is provided on the absorbing glass substrate, that has a single layer structure, and that comprises a dehydrated condensate of at least one coupling agent, said coupling agent comprising a silicon compound containing a Si atom and a metal alkoxide containing one or more selected from a Zr atom and an Al atom;
- and
- a resin layer disposed on the bonding layer,
- wherein the at least one coupling agent comprises
- from 85 to 94 mol % of a silicon compound represented by Formula (V) below;
- and
- from 6 to 15 mol % of a metal alkoxide selected from a metal alkoxide represented by Formula (VII) and Formula (VIII) below:
- Si(OR7)(OR8)(OR9)OH (V),
- where R7, R8 and R9 are straight- or branched-chain hydrocarbon groups having 1 to 10 carbon atoms and are equal to or different from each other,
- Zr(OR17)(OR18)(OR19)(OR20) (VII),
- where R17, R18, R19 and R20 are straight- or branched-chain hydrocarbon groups having 1 to 10 carbon atoms and are equal to or different from each other, and
- Al(OR21)(OR22)(OR23) (VIII),
- where R21, R22 and R23 are straight- or branched-chain hydrocarbon groups having 1 to 10 carbon atoms and are equal to or different from each other;
- and
- wherein the bonding layer is 0.01 μm to 0.5 μm in thickness.
Dependencies are inferred from the claim text.