硒化锌材料对热冲击具有很高的承受能力, 使它成为高功率CO2激光器系统中的*佳光学材料。硬度只是多光谱级ZnS的2/3, 材质较软易产生划痕, 而且材料折射率较大, 所以需要在其表面镀制高硬度减反射膜来加以保护并获得较高的透过率。在其常用光谱范围内, 散射很低。在用做高功率激光器件时, 需要严格控制材料的体吸收和内部结构缺陷, 并采用*小破坏程度的抛光技术和光学质量的镀膜工艺。

广泛应用于激光,医学，天文学和红外夜视等领域中。

订购型号:MPZNSEBS50.8-50.8

参数：

IR Polished Zinc Selenide (ZnSe) beamsplitter

50.8 x 50.8 x 3mm 45° beamsplitter.

50% transmission / 50% reflection @45° for 2-14µm

参数详细信息：

No = Ordinary Ray

关于晶体切割：

During Chemical Vapour Deposition the small crystallite grains align with the direction of growth, and are

normal to the thickness of the sheet produced. For windows of normal thickness and aspect ratios the alignment of the grain therefore is rarely a problem as they are cut from the grown sheet such that within an optical window the grains align perpendicular to the surfaces. This is optimum orientation for lowest internal absorption and scatter.

With prisms, the cutting direction requires more consideration. It is recommended that the thickness of the strip material corresponds to the apex height of the prism. This ensures optimum crystallite orientation for most usual

prism applications.

For typical 45° prisms the most obvious use of material is shown in (A) but it

should be noted that this is not the optimum orientation.

The best choice is (B) and it also permits a higher limit on prism size or conversely allows thinner stock to be used. There is waste at the ends of the strip but this is small and so it may not be quite as economic as (A).

Cutting in direction (C) where the entire light beam runs at 90° to the grain

structure should be avoided completely if at all possible. Note that maximum available thickness of ZnSe and ZnS (FLIR) is approximately 60mm. Maximum available thickness of ZnS Cleartran is approximately 30mm

更新时间：2023/5/24 17:35:17