The 67-566 is a Plano-Convex lens with a diameter of 25.4mm and a focal length of 101.6mm, specifically designed for use in the Near-Infrared II (NIR II) spectrum, covering the wavelength range of 750-1550nm. This lens is sourced from the reputable vendor, Edmund Optics.
The lens is made of N-BK7 Schott glass, a popular choice for its high refractive index and low dispersion, making it ideal for a wide range of optical applications. The lens features a spherical shape, with a radius of curvature of 32.82mm on the front surface and a center thickness of 4.75mm. The edge thickness of the lens is 2.19mm.
The lens boasts an effective focal length (EFL) of 63.5mm and a back focal length (BFL) of 60.37mm. The inner and outer radii of the lens are 0mm, indicating a uniform curvature across the lens surface.
The 67-566 lens comes with a standard NIR II coating on both the front and back surfaces. This coating is specifically designed to enhance the lens' performance in the NIR II spectrum, ensuring optimal transmission and minimal reflection across the specified wavelength range.