红外菲涅尔透镜容易成型,0.015英寸(0.457毫米)厚,乳白色塑料。这种产品的优点是:8-14μm 范围内最少吸收损失,特别是它们有一致的薄、厚度,大孔径和最小的热膨胀。红外传输菲涅尔透镜的设计包含许多复杂的构思。菲涅尔透镜的槽面将面对长久变化(远离探测器为的是聚集辐射能),对于非光学来说,平滑面将对应长久变化,镜头最大孔径将是1.0。既然这样,全反射会保存来自像面通过F1.0区域的全部辐射。即使当槽口面对长久变化,通过镜头F1.0 的这部分贡献减少而通过F0.5的没意义。
Durability Specifications | |
Effect of Sunlight | None to Slight |
Effect of Ultraviolet | UV Stabilized |
Effect of Weak Acids | Very Little |
Effect of Strong Acids | Attacked by Oxidizing Acids |
Effect of Weak Alkalies | Very Little |
Effect of Strong Alkalies | Very Little |
Effect of Organic Solvents | Little below 60°C (140°F) |