16-965 30mm Dia. N-SF6 Precision Aspheric Lens; EFL=17.5mm; NA=0.86 VIS-EXT Plus 350-700nm

The 16-965 is a high-precision aspheric lens, boasting a 30mm diameter and a numerical aperture (NA) of 0.86. This lens is designed to work within the visible light spectrum, specifically between 350 and 700nm. The lens is fabricated from N-SF6 Schott, a high-quality optical glass known for its excellent transmission properties and chemical resistance.

The lens features an effective focal length (EFL) of 17.5mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity. The lens also has a high refractive power, which is evident in its short back focal length (BFL) of 10.3mm. This makes the lens suitable for use in compact optical systems where space is at a premium.

The aspheric design of the lens helps to correct spherical aberration, a common optical issue that can lead to distorted or blurry images. The lens's geometry includes a series of aspheric coefficients (k1, k2, etc.) that define its unique shape and help to minimize optical aberrations.

The lens is coated with Edmund Optics' VIS-EXT Plus coating, which is designed to enhance the lens's transmission properties within the specified wavelength range. This coating helps to reduce surface reflections, improving the overall efficiency and contrast of the optical system.