Organic-inorganic composite forming material, organic-inorganic composite, production method thereof and optical element

Abstract

An organic-inorganic composite forming material which contains an organometallic polymer having an -M-O-M- bond (M denotes a metal atom), an acrylic monomer or oligomer having a hydrophilic group and inorganic particles. Preferably, the organometallic polymer has Si in the place of M and is obtained via hydrolysis and polycondensation of trialkoxysilane having a photo- or thermally-polymerizable group and dialkoxysilane having a phenyl group.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a graph which shows the Nb₂O₅ content vs. refractive index for examples of an organic-inorganic composite in accordance with the present invention;

FIG. 2 is a schematic sectional view which shows a composite aspherical lens as an embodiment of an optical element in accordance with the present invention;

FIG. 3 is a schematic sectional view which shows a camera module as an embodiment of an optical device in accordance with the present invention;

FIG. 4 is a sectional view which shows a folding mobile telephone incorporating a conventional camera module;

FIG. 5 is a sectional view which shows an embodiment of a mobile telephone in accordance with the present invention; and

FIG. 6 is a schematic sectional view which shows a diffraction rating as another embodiment of an optical element of the present invention.

Claims

1. An organic-inorganic composite forming material characterized in that it contains an organometallic polymer having an -M-N-M- bond (M denotes a metal atom), an acrylic monomer or oligomer having a hydrophilic group, and inorganic particles.

2. The organic-inorganic composite forming material as recited in claim 1, characterized in that said organometallic polymer has Si in the place of M and is obtained via hydrolysis and polycondensation of a silane compound having a photo- or thermally-polymerizable group and another silane compound having a phenyl group.

3. The organic-inorganic composite forming material as recited in claim 1, characterized in that said organometallic polymer has Si in the place of M and is obtained via hydrolysis and polycondensation of trialkoxysilane having a photo- or thermally-polymerizable group and dialkoxysilane having a phenyl group.

4. The organic-inorganic composite forming material as recited in claim 1, characterized in that said hydrophilic group in the acrylic monomer or oligomer is a hydroxyl group.

5. The organic-inorganic composite forming material as recited in claim 1, characterized in that it comprises 33-95% by weight of the organometallic polymer, 4-17% by weight of the acrylic monomer or oligomer, and 1-50% by weight of the inorganic particles.

6. The organic-inorganic composite forming material as recited in claim 1, characterized in that said inorganic particles are composed of at least one selected from Nb2O5 and TiO2.

7. An organic-inorganic composite characterized in that it is obtained via polymerization of the organic-inorganic composite forming material as recited in claim 1.

8. An optical element characterized in that it uses the organic-inorganic composite as recited in claim 7.

9. An optical device characterized in that it uses the optical element as recited in claim 8.

10. A method for production of the organic-inorganic composite as recited in claim 7, characterized in that it comprises the steps of polymerizing an organometallic polymer forming material in a dispersion of said inorganic particles to form the organometallic polymer, adding said acrylic monomer or oligomer to allow polycondensation with the organometallic polymer.

11. The method for production of the organic-inorganic composite as recited in claim 10, characterized in that said organometallic polymer has Si in the place of M and is obtained via hydrolysis and polycondensation of a silane compound having a photo- or thermally-polymerizable group and another silane compound having a phenyl group.

12. The method for production of the organic-inorganic composite as recited in claim 10, characterized in that said organometallic polymer has Si in the place of M and is obtained via hydrolysis and polycondensation of trialkoxysilane having a photo- or thermally-polymerizable group and dialkoxysilane having a phenyl group.

13. The method for production of the organic-inorganic composite as recited in claim 10, characterized in that said hydrophilic group in the acrylic monomer or oligomer is a hydroxyl group.