67-271 50mm Dia. UVFS Aspheric Lens; EFL=40mm; NA=0.63 UV 250-425nm

The 67-271 is a high-performance aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 50mm diameter and a numerical aperture (NA) of 0.63, making it a versatile choice for a wide range of optical applications.

The lens is made from UV fused silica, a material known for its excellent transparency in the ultraviolet (UV) region of the spectrum, specifically between 250 and 425nm. This makes the 67-271 particularly suitable for UV-based applications, such as UV microscopy, spectroscopy, and other UV imaging systems.

The aspheric design of the lens helps to correct spherical aberration, a common issue in traditional spherical lenses. This results in improved image quality, with sharper focus and reduced distortion. The lens has a focal length of 40mm, as indicated by its effective focal length (EFL), which is a measure of the lens's focusing power.

The lens is coated with a UV coating, specifically designed for the 250-425nm range. This coating helps to enhance the lens's transmission in the UV region, reducing losses due to reflection and scattering. The coating is applied to both the front and back surfaces of the lens, ensuring optimal performance from all angles.

The lens has a center thickness of 27.5mm and an edge thickness of 4.07mm. The front surface of the lens has a radius of curvature (R1) of 4.585mm, while the back surface (R2) is flat. The lens's geometry is designed to provide excellent performance while maintaining a compact and manageable size.