| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter hardly attaching dirts such as dirts of the hands and scale, making the dirt inconspicuous, easy to remove hardly damaging the surface because of being capable of easily sliding, and durable to wear. SOLUTION: A coating composition containing an alkoxysilane compound having a perfluoropolyether group represented by general formula Rf COR1 -R2 -Si(OR3 )3 (in the formula, Rf represents a perfluoropolyether group, R1 usually represents an atom or an atomic group of O, NH, S or the like, R2 represents an alkylene chain, and R3 represents an alkyl group.) is applied to the surface of a reflection preventing film of a single layer or a multilayer whose surface layer mainly comprises silicon dioxide formed on a glass substrate, then dried at 100 deg.C or lower to obtain a filter having reflection preventing property. |
