Optical member, optical semiconductor device, and illumination apparatus

The present invention provides an optical member comprising a silicone material having excellent antifouling property while having good light transmittance, heat resistance, and strength, and an optical semiconductor device and illumination apparatus having excellent antifouling property. The present invention is the optical member comprising a silicone material containing a fluorinated surface, the proportion of F atoms being from 0.1 to 45 at% and/or the ratio of F atoms relative to C atoms being from 0.01 to 1.00 in the atomic composition percentage according to X-ray photoelectron spectroscopy (XPS) of the fluorinated surface. 本发明提供了种包含具有优异防污特性、同时具有良好透光率、耐热性和强度的有机硅材料的光学构件，以及具有优异防污特性的光学半导体器件和照明设备。本发明是种包含具有氟化表面的有机硅材料的光学构件，根据所述氟化表面的X射线光电子能谱学(XPS)得出的原子组成百分比计，F原子的比例为0.1至45原子％，和/或F原子相对于C原子的比率为0.01至1.00。