Optical element
First Claim
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1. An optical element for controlling light propagation, comprising:
- a transparent material; and
inorganic fine particles dispersed in the transparent material,wherein the transparent material and the inorganic fine particles meet at least one of following a) and b);
a) a rate of change of a refractive index of the transparent material with temperature and a rate of change of a refractive index of the inorganic fine particles with temperature are opposite in sign, andb) a thermal expansion coefficient of the transparent material and a thermal expansion coefficient of the inorganic fine particles are opposite in sign,wherein the inorganic fine particles comprise a functional group, the functional group being introduced into the inorganic fine particles by surface modification, andwherein the transparent material is an organic polymer.
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Abstract
An optical element for controlling light propagation including: transparent material; and inorganic fine particles dispersed in the transparent material, wherein the transparent material and the inorganic fine particles meet at least one of following a) and b): a) a rate of change of a refractive index of the transparent material with temperature and a rate of change of a refractive index of the inorganic fine particles with temperature are opposite in sign; b) a thermal expansion coefficient of the transparent material and a thermal expansion coefficient of the inorganic fine particles are opposite in sign.
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Citations
14 Claims
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1. An optical element for controlling light propagation, comprising:
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a transparent material; and inorganic fine particles dispersed in the transparent material, wherein the transparent material and the inorganic fine particles meet at least one of following a) and b); a) a rate of change of a refractive index of the transparent material with temperature and a rate of change of a refractive index of the inorganic fine particles with temperature are opposite in sign, and b) a thermal expansion coefficient of the transparent material and a thermal expansion coefficient of the inorganic fine particles are opposite in sign, wherein the inorganic fine particles comprise a functional group, the functional group being introduced into the inorganic fine particles by surface modification, and wherein the transparent material is an organic polymer. - View Dependent Claims (4, 5, 6, 7, 11, 12, 13, 14)
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2. An optical element for controlling light propagation, comprising:
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a transparent material; and inorganic fine particles dispersed in the transparent material, wherein the transparent material and the inorganic fine particles meet at least one of following a) and b); a) a rate of change of a refractive index of the transparent material with temperature and a rate of change of a refractive index of the inorganic fine particles with temperature are opposite in sign, and b) a thermal expansion coefficient of the transparent material and a thermal expansion coefficient of the inorganic fine particles are opposite in sign, wherein the inorganic fine particles comprise a functional group, the functional group being introduced into the inorganic fine particles by surface modification, and wherein the functional group is at least one of a group enhancing an affinity for the organic polymer, a reactive group, and a photosensitive group. - View Dependent Claims (8, 9)
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3. An optical element for controlling light propagation, comprising:
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a transparent material; and inorganic fine particles dispersed in the transparent material, wherein the transparent material and the inorganic fine particles meet at least one of following a) and b); a) a rate of change of a refractive index of the transparent material with temperature and a rate of change of a refractive index of the inorganic fine particles with temperature are opposite in sign, and b) a thermal expansion coefficient of the transparent material and a thermal expansion coefficient of the inorganic fine particles are opposite in sign, wherein the inorganic fine particles comprise a functional group, the functional group being introduced into the inorganic fine particles by surface modification, and wherein an amount of the functional group in the inorganic fine particles is 0.5 to 50 wt % in terms of a compound comprising the functional group. - View Dependent Claims (10)
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Specification