最近刚给一个客户定做了一批所谓的陶瓷腔,激光陶瓷腔的主要材料是聚四氟乙烯,聚四氟乙烯在300-2500nm范围内具有很好的漫反射特性(接近朗伯体),而且大部分波段反射率都在99%以上,因此该材料也用于反射率标准板,即常说的白板。因此该腔具有以下特点:
1,提高光利用效率
2,提高光束均匀性(漫反射特性)
3,良好的疏水性,不存在腐蚀、生锈的问题
既然是聚合物,为什么叫陶瓷腔呢?还是真的有陶瓷这种材料的激光腔?
楼主,你什么公司的.麻烦你发给我icueyes@yahoo.com
以后可能要你们帮忙加工腔体.
关于温度及稳定性,提供如下材料作参考
How stable is Fluorilon-99 to aging? Under 'normal' conditions, Fluorilon-99W, as with any sintered PTFE product, will have indefinite stability. The only causes of instability are contaminants introduced into the material from the environment in which it is used. Advanced aging studies on sintered PTFE such as Fluorilon™ have indicated stability in excess of 100 years.
What kind of effects happen with temperature/reflectance? Does high or low temperatures cause any difference?
Sintered PTFE such as Fluorilon has been used extensively as a standard for spectrophotometers and spectroradiometers in low-earth orbit space platforms. Under such conditions, it experiences temperatures from about 4K to about 450K. While the expansion and contraction of the material may cause minor changes in reflectance, there are no literature citations (and the literature is extensive) that indicates that there IS a change.
楼主在乱说,陶瓷腔就是用工业陶瓷做的,聚四氟乙烯腔简称四氟腔,才是聚合物的。早年有直接用聚四氟乙烯棒材加工的,后来发现其漫反射性能不如采用粉状聚四氟乙烯压制的好,现在基本都是压制的。优点不必说,缺点除了2楼提到的变形外,还有一点就是若冷却水不经常更换(或没加过滤器),则使用时间长了以后会有杂质颗粒进入其内部,无法清除,极大地影响反射效率。
当然,陶瓷腔不加釉的也会有杂质进入内部的情况,加釉的又会影响漫反射特性。
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