The M-ID-1.5 Iris Diaphragm uses 18 leaves for a 2.4 to 41.3 mm aperture range. Designed for smooth adjustment and the best possible aperture shape, each iris consists of an array of curved, spring-steel leaves whose orientation is determined by the relative position of two rings. A pin handle on the inner ring lets you adjust the aperture without risk of obstructing the beam path. M-ID-1.5 Irises mount directly on Posts and Pedestals and have Metric M4 thread. Iris Diaphragms provide continuously variable apertures for applications including setting the numerical aperture of a lens, controlling or measuring the intensity of a diffuse beam, or approximating beam diameters. They may also be used as baffles to reduce spurious reflections and scattered light.

M-ID-1.5 Iris隔膜使用18片叶子，孔径范围为2.4到41.3毫米。为了平滑调整和最佳的孔径形状，每个虹膜由一系列弯曲的弹簧钢叶片组成，叶片的方向由两个环的相对位置决定。内环上的一个销柄可以让你调整光圈，而不会有阻碍光束路径的风险。M-ID-1.5 Irises直接安装在柱和基座上，并具有公制M4螺纹。虹膜膜片提供连续可变的孔径，用于设置透镜的数值孔径、控制或测量漫射光束的强度或近似光束直径。它们也可以用作挡板，以减少假反射和散射光。