Newport MKS Iris Diaphragm Pack, 2.4-41.3 mm Aperture, 8-32, 18 Leaves, Qty 6 ID-1.5-PK

This is a 6-pack of the Iris Diaphragm. The ID-1.5 Iris Diaphragm uses 18 leaves to provide a continuously variable aperture 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. The ID-1.5 offers 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. ID-1.5 Iris Diaphragm mounts directly on Posts and Pedestals. Continuously Adjustable Opening With Ideal Shape For smooth adjustment and an optimal shape for the aperture opening, each iris consists of an array of curved, overlapping, spring-steel leaves that intersect into the circular opening. Up to 18 leaves adjust continuously between two supporting rings with the adjustment of a pin handle attached to the inner ring.