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SM2D25D Iris Shown Threaded into
Our SM2 (2.035"-40) threaded irises are compatible with our Ø2" lens tubes and other SM2-threaded components. Each iris has internal SM threading on one side and external SM threading on the other side. The individual black spring steel leaves pivot within the outer ring of the iris and are designed for long-lasting performance over several thousand cycles.
The SM2D25D ring-actuated iris is designed for integration into a 60 mm cage assembly, where the movement of a lever actuated iris would be hampered by the cage rods. This iris also features a locking setscrew with a 0.05" (1.3 mm) hex for locking the ring during installation or removal. Thorlabs also offers the LCP50S Iris for 60 mm Cage Systems which is integrated into a cage plate for direct mounting to cage rods.