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Cage System Iris Diaphragms
For 30 mm
For 60 mm Cage Systems
CP20S Iris in a Cage System with a KCB1C Right-Angle Kinematic Mount and a CP02 Cage Plate Holding an SM1L10 Lens Tube
Thorlabs’ Cage System Irises are designed for use within a cage system. The button head lever on these irises clears the fourth cage rod, allowing for aperture adjustments within the cage system.
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The cage system irises are actuated using a button head lever, wihch is accessible within the cage system. Here, the CP20S is shown with its iris in two positions.
These lever-actuated, continuously variable, cage-system-compatible iris diaphragms are designed to provide smooth operation over many thousands of cycles. These irises are mounted in ultra-thin, cage-system-compatible plates that engage three cage rods with a flexure mechanism that tightens using a 5/64" (2 mm) hex. The steel leaves that comprise the iris are actuated by a button head lever that clears the fourth cage rod, as shown in the picture to the right, allowing for operation within a cage system. These large-aperture irises provide the maximum aperture available for use within a cage system and are permanently installed in the cage plates.
In addition to the cage system irises sold on this page, our SM-Threaded Ring-Actuated Irises can also be utilized in a cage system with the use of an SM-threaded cage plate. However, the cage system irises featured on this page offer larger apertures and thinner profiles than the ring-actuated irises. For non-cage system use, we also offer Post-Mountable Irises, SM-Threaded Lever-Actuated Irises, and Unmounted Irises with no mounting holes. Please see the selection guide above for a link to the full web presentations for these other options.