Patent ID: 7600881

Claim:
A semiconductor light emitting apparatus comprising: a semiconductor light emitting device; and a resin that seals the semiconductor light emitting device, at least a portion of the surface of the resin being provided with asperities having an average pitch less than ½ of a wavelength of light emitted through the resin, wherein the wavelength λ of the light, an average width a of projections of the asperities, an average width b of recesses of the asperities, a refractive index n 1 of the resin and a refractive index n 2 of air generally satisfy a following condition: tan ⁡ ( n 1 ⁢ a λ ⁢ π ) ≅ n 1 ⁢ a λ ⁢ π , ⁢ tan ⁡ ( n 2 ⁢ b λ ⁢ π ) ≅ n 2 ⁢ b λ ⁢ π .