• Smooth, continuous aperture control

• 2.5 - 73 mm aperture range

• Post mountable

• Compatible with X26 Rail System 

M-DI47 Series Iris Diaphragms have a continuously variable aperture for applications including adjusting the numerical aperture of a lens, aligning a laser beam, or controlling the intensity of a diffuse beam. They may also be used as baffles to reduce spurious reflections and scattered light. Three sizes are available, spanning aperture sizes from 2.5 - 73 mm in overlapping ranges.

Designed for smooth adjustment and the best possible aperture shape, each iris consists of an array of curved leaves whose orientation is determined by the relative position of two rings. Rotating the outer knurled ring adjusts the aperture without risk of obstructing the beam path. The M4-threaded stud allows the iris diaphragm to be mounted on a metric SP or MSP Post. These iris diaphragms are also compatible with X26 Rail System components.