本文通过光学计算设计了具有不同厚度的三倍频增透膜.以氨水为催化剂、正硅酸乙酯(TEOS)为前驱体,通过溶胶-凝胶(Sol-Gel)技术制得SiO2溶胶；采用浸渍提拉法镀膜得到符合设计要求的三倍频增透膜.研究结果表明,增透膜的耐磨擦性能随着膜层厚度的增大而增大,本文制得的厚度达到200 nm以上的三倍频增透膜耐磨擦性能显著优于传统的1/4波长三倍频增透膜.此外,本文以甲基含氢硅油为膜表面修饰剂,提出一种全新的超快的表面疏水性改性的方法.经该方法处理后,增透膜由亲水膜转变为疏水膜,对水的接触角从23.4.增大至95.,增透膜的耐环境性显著提高.%Third-harmonic antireflective (AR) coatings with different thickness were designed via optical formula in this work. Using tetraethylorthosilicate (TEOS) as precursor and ammonia as catalyst, SiC>2 sol was prepared by sol-gel process. The designed AR coatings were obtained by dip-coating process. It is found that the abrasion-resistance of AR coatings increased with film thickness, indicating that the abrasion-resistance of third-harmonic AR coatings prepared in this work is much better than that of the traditional quarter-wave third-harmonic AR coating. In addition, a totally new and super-fast surface modification method was proposed by using methyl hydrogen silicone oil as modifier. The water contact angle of AR coating increased from 23.4° to 95° after the surface modification.
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