The 81389 Air Mass Filter simulates the solar spectrum at ground level when the sun is directly overhead. This 2 inch x 2 inch filter fits into a solar simulator's integral filter holder, with a convenient pull handle allowing for quick and easy insertion as well as removal of the filter. It can be mounted into most solar simulator models. The 81389 is an AM Direct type filter which meets the AM 1.5 D spectrum per the ASTM E 891 standard. It can also match  the AM 1.0 D and AM 2.0 D spectra.

81389空气质量过滤器在地面模拟太阳直射时的光谱。这个2英寸x 2英寸的过滤器适合太阳模拟器的整体过滤器支架，方便的拉手允许快速和容易插入和移除过滤器。它可以安装在大多数太阳模拟器模型。81389是一个AM型直接过滤器，它符合astme891标准的AM 1.5 D光谱。它还可以匹配AM 1.0 D和AM 2.0 D光谱。