Optical member with layer having a coating geometry and composition that enhance cleaning properties

(57) -- the improved transparent light element containing the nano structure layer which has the geometric arrangement by which summary strengthening was carried out, and the balance of the chemical (hydrophile property and hydrophobicity) feature -- a glass board can be preferably formed in the surface. The geometric arrangement and chemical nature of the layer combine, and wettability improves. The above-mentioned layer can be manufactured by forming a layer including silicon compound coating of oxidized silicon coating, silicon carbide coating, silicon nitride coating, or its mixture. The above-mentioned coating may have a thickness of about 1*100 nm (10 meters). The above-mentioned layer has desirable granularity from the irregular or regular arrangement of structure. You may dope the above-mentioned layer with 2 values, 3 values, or a polyvalent metal compound. It turns out that detergency of coating such is improving, and it turns out that such coating is combined with the priority to the water solution applied to glass. The tendency to remove the dirt which 沈積 (ed) or contacted the glass surface has the preferential combination (wettability) to the hydrophile property and water solution. As a result, it is tended with water solution to stick glass, when water solution is contacted, it is in the tendency to separate dirt, and it increases substantially the pure ease of a glass surface using water, water washing solution, etc.