67-258 20 mm Dia. N-SF5 Precision Aspheric Lens; EFL=12.5mm; NA=0.8 BBAR 600-1050nm

This is a high-precision aspheric lens from the renowned optical components manufacturer, Edmund Optics. The lens, catalog number 67-258, is designed for use in the near-infrared (NIR) region of the spectrum, with a central wavelength of 587.6 nm.

The lens is made from N-SF5 Schott glass, a material known for its excellent optical properties and chemical resistance. It has a base shape of a circle, with a diameter of 20 mm, making it suitable for a wide range of optical applications. The lens features a high numerical aperture (NA) of 0.8, indicating its ability to collect and focus light efficiently.

The lens's geometry is precisely engineered, with an inner radius of 0 mm and an outer radius of 0 mm. It has a thickness at the edge of 1.91 mm and an effective focal length (EFL) of 12.5 mm. The lens's front surface has an aspheric shape with a radius of curvature (R1) of 8.409 mm and a conic constant (K1) of -1.312935. The back surface is planar.

The lens is coated with BBAR 600-1050, a broadband anti-reflection coating that reduces surface reflections and increases transmission in the 600-1050 nm range. This coating ensures optimal performance in NIR applications.

The lens is currently in stock, according to the vendor's website, and more information can be found at the provided weblink.