KBX028AR.16 12.7 mm Dia. x 25.4 mm FL; NIR coated; Double-Convex Lens NIR 650-1000nm

This KBX028AR.16 lens, sourced from MKS/Newport, is a high-quality optical component designed for use in the near-infrared (NIR) spectrum, specifically between 650 and 1000 nanometers. It is a spherical lens, featuring a double-convex geometry, which is characterized by its circular base shape and two curved surfaces that both refract light inwards.

The lens has a diameter of 12.7 millimeters and a thickness at the edge of 3 millimeters. The center thickness is slightly greater at 4.61 millimeters. The effective focal length (EFL) of the lens is 25.4 millimeters, which is the distance over which the lens forms a parallel beam of light when an object is placed one focal length away.

The first radius of curvature (R1) is 25.444 millimeters, while the second radius of curvature (R2) is -25.444 millimeters, indicating that the second surface is concave. The back focal length (BFL) is 23.83 millimeters, which is the distance from the rear surface of the lens to the focal point of the lens.

The lens is made from N-BK7 Schott, a popular optical glass known for its excellent optical properties and wide transparency range. It is coated with a new AR-16 coating on both the front and back surfaces, which is specifically designed to reduce reflection in the NIR spectrum.

This lens is a versatile and reliable choice for a wide range of optical applications that require high-quality NIR transmission and precise focusing capabilities.