67-548 25.0mm Dia. x 75.0mm FL; NIR II Coated; Plano-Convex Lens NIR II 750-1550nm

This is a 25.0mm diameter by 75.0mm focal length Plano-Convex lens, specifically designed for use in the Near-Infrared II (NIR II) spectrum, covering the wavelength range of 750-1550nm. The lens is sourced from the reputable optical vendor, Edmund Optics.

The lens is made from the high-quality material, N-BK7 Schott, which is known for its excellent optical properties and durability. The lens features a spherical shape, with a front radius of curvature of 20.67mm and a back focal length of 36.31mm. The lens has an effective focal length (EFL) of 40mm, which is the distance from the lens's secondary principal plane to the image point, assuming an object at infinity.

The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is specifically designed to enhance the lens's performance in the NIR II spectrum, ensuring optimal transmission and minimal reflection. The edge thickness of the lens is 1.39mm, while the center thickness is 5.6mm, providing a robust and stable structure.