37-417 12.5mm Dia. N-SF6 Precision Aspheric Lens; EFL=12.5mm; NA=0.5 Uncoated

This is a high-precision aspheric lens, catalog number 37-417, offered by Edmund Optics. The lens is made of N-SF6 Schott, a high-quality optical material known for its excellent transparency and chemical resistance. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties.

The lens has a diameter of 12.5mm and a numerical aperture (NA) of 0.5. The NA is a measure of the light-gathering ability of the lens. A higher NA allows for a greater light-gathering capacity, which can be beneficial in many applications. The effective focal length (EFL) of the lens is also 12.5mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity.

The lens has an inner radius of 0mm and an outer radius of 0mm, indicating that it is a symmetrical lens. The thickness at the edge of the lens is 5.5mm, and the thickness at the center is 7.5mm. The lens's front surface has a radius of curvature (R1) of 10.065mm, and the back surface (R2) is flat.

The lens's front surface has a conic constant (k1) of -0.896905, which is a measure of the asphericity of the surface. A negative k1 value indicates that the surface is concave. The lens's front surface also has third-order aspheric coefficients (e front, f front, g front, h front, j front, and l front), which are used to accurately describe the shape of the surface.

This lens is suitable for use in a wide range of applications, including imaging, beam shaping, and laser applications. It is in stock, as indicated by its weblink status, and more information about the lens can be found on the Edmund Optics website.