This is a 2.0mm diameter x 4.0mm focal length Plano-Convex lens, sourced from the renowned optical components vendor, Edmund Optics. The lens is made from the high-quality material n-lasf9 schott, which is known for its excellent optical properties.
The lens features a VIS-EXT coating on both the front and back surfaces, designed to enhance its performance within the visible light spectrum, specifically between 350-700nm. This coating aids in reducing surface reflections, thereby improving transmission and overall image quality.
The geometry of the lens includes a 0.65mm thickness at the edge, increasing slightly to 0.8mm at the center. The effective focal length (EFL) is 4mm, and the radius of curvature (R1) is 3.4mm. The back focal length (BFL) is 3.57mm. The lens is spherical in shape, ensuring a high degree of optical accuracy.
According to the vendor's information, this lens is currently in stock, making it readily available for your optical system needs. The provided weblink allows for easy access to additional information and purchasing options.