84-378 3mm Dia. x -9 FL; VIS 0deg Coated; Plano-Concave Lens 425-675nm

The 84-378 is a 3mm diameter Plano-Concave Lens with a focal length of -9, sourced from Edmund Optics. This lens is designed for use within the visible light spectrum, specifically between 425-675nm. The lens is made from n-sf11 Schott material, a high-index glass often used in optical applications due to its excellent Abbe number and low dispersion.

The lens features a standard anti-reflection coating on both the front and back surfaces, specifically the "edm vis-0 std curve" coating. This coating is designed to reduce surface reflections and increase transmission within the visible light spectrum. The lens has a thickness of 1.11mm at the edge and 1mm at the center, providing a robust structure while maintaining a low profile.

The 84-378's geometry includes a 3mm diameter, a 0mm inner radius, and a 0mm outer radius, making it a circular lens with flat surfaces. The back focal length is -9.56mm, slightly longer than the focal length due to the lens's concave design.

This lens is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink. With its high-quality materials, precise geometry, and versatile coating, the 84-378 is a reliable choice for various optical applications within its specified wavelength range.