Manufacturing method of a light scattering light guide
First Claim
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1. A manufacturing method of a light scattering light guide, comprising the steps of:
- (a) providing first and second organic substances, the first organic substance being a monomer and the second organic substance being a polymer or oligomer, a polymer of the first organic substance having a different refractive index and a different compatibility than those of the second organic substance;
(b) preparing a mixed transparent solution by substantially completely dissolving the second organic substance in the first organic substance;
(c) starting a polymerization reaction;
(d) allowing the first organic substance in the mixed transparent solution to polymerize so that as polymerization proceeds, compatibility with the second organic substance decreases causing the second organic substance to coagulate; and
(e) obtaining a heterogeneous coagulated structure having heterogeneities with a size corresponding to a correlation distance "a" in the range of 0.07 μ
m≦
a≦
50 μ
m and an effective scattering irradiation parameter E in the range of 0.45 cm-1 ≦
E ≦
80 cm-1.
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Abstract
A light scattering light guide, which is capable of converting a light flux of a relatively small cross-sectional area into a light flux of a relatively large area with high efficiency and uniformity, manufacturing method thereof, and applied optical apparatuses such as backlight light source apparatuses and light branching/mixing devices which make effective use of the characteristics of said light scattering light guide. Such light scattering light guide is obtained by utilizing various structures with irregular refraction indexes generated in the process of polymerization of organic materials.
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Citations
2 Claims
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1. A manufacturing method of a light scattering light guide, comprising the steps of:
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(a) providing first and second organic substances, the first organic substance being a monomer and the second organic substance being a polymer or oligomer, a polymer of the first organic substance having a different refractive index and a different compatibility than those of the second organic substance; (b) preparing a mixed transparent solution by substantially completely dissolving the second organic substance in the first organic substance; (c) starting a polymerization reaction; (d) allowing the first organic substance in the mixed transparent solution to polymerize so that as polymerization proceeds, compatibility with the second organic substance decreases causing the second organic substance to coagulate; and (e) obtaining a heterogeneous coagulated structure having heterogeneities with a size corresponding to a correlation distance "a" in the range of 0.07 μ
m≦
a≦
50 μ
m and an effective scattering irradiation parameter E in the range of 0.45 cm-1 ≦
E ≦
80 cm-1.
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2. A manufacturing method of a light scattering light guide, comprising the steps of:
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(a) preparing a uniformly mixed monomer solution by combining first and second monomers, the first monomer being more reactive than the second monomer, the respective polymers of the first and second monomers having different refractive indices; (b) starting a polymerization reaction; (c) allowing the monomer mixture to polymerize so that initially the first monomer polymerizes preferentially causing the second monomer to coagulate, and subsequently, as the first monomer is consumed, the second monomer polymerizes preferentially; and (d) obtaining a heterogeneous coagulated structure having heterogeneities with a size corresponding to a correlation distance "a" in the range of 0.07 μ
m≦
a≦
50 μ
m and an effective scattering irradiation parameter E in the range of 0.45 cm-1 ≦
E≦
80 cm-1.
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Specification