Iris diaphragms are opto-mechanical components designed to precisely control the amount of light passing through the optical path. Composed of thin, overlapping metal blades that can be expanded and contracted to adjust the aperture, they are used in many optical applications such as microscopes, cameras, laser systems and other precision devices where light modulation is critical. Manufactured from high quality materials such as brass, spring steel and aluminum to ensure durability and smooth operation, our iris diaphragms offer excellent performance and long life.