89-197 40mm Dia. x 120mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

The 89-197 is a high-quality double-convex lens, boasting a 40mm diameter and a focal length of 120mm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available in stock for immediate use. The lens is designed for use within the visible light spectrum, specifically between 350-700nm, making it suitable for a wide range of optical applications.

The lens is constructed from Schott's n-BK7 glass, a material well-known for its excellent optical properties, including a high Abbe number and low dispersion. This ensures the lens delivers clear, high-resolution images with minimal chromatic aberration. The lens features a front and back coating of EDM VIS-EXT, a broadband anti-reflection coating that enhances transmission within the visible spectrum, further improving image quality.

The lens's geometry is meticulously crafted, with an edge thickness of 3.72mm and a center thickness of 7mm. The lens's front and back radii are 122.83mm and -122.83mm, respectively, contributing to its double-convex shape. The back focal length is 117.67mm, and the lens has no inner or outer radius, indicating a uniform thickness.