| 摘要 |
An optical member with Gan powder is provided to have optical diffusion and optical block since GaN powder is included on the surface or inside of a preform. A GaN particle(122) is coated on the surface or the inside of the preform(110) or which is dispersed on the base material. In an optical member, the refractive index of the GaN particle is 2.-2.5, the diameter of GaN is 1-50nm or 1-50um. A perform is a transparent film or a substrate and one of thin polymer film, plastic substrate, glass substrate, and has also has at least uneven surface.
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