16-953 15mm Dia. N-SF6 Precision Aspheric Lens; EFL=15mm; NA=0.5 VIS-EXT Plus 350-700nm

The 16-953 is a high-precision aspheric lens offered by Edmund Optics, designed for use within the visible light spectrum, specifically between 350-700nm. This lens is constructed from N-SF6 Schott glass, a material known for its excellent optical properties and durability.

The lens features a 15mm diameter and a numerical aperture (NA) of 0.5, making it suitable for a wide range of applications that require high resolution and light gathering capabilities. The NA is a measure of the light-gathering ability of the lens and its ability to resolve fine details. A higher NA allows for more light to be gathered, which can be beneficial in low-light conditions or when high resolution is required.

The lens has an effective focal length (EFL) of 15mm, which is the distance from the lens's optical center to the point at which it focuses light. This EFL makes the lens suitable for use in compact optical systems where space is limited.

The lens's geometry is also noteworthy. It has an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 6.21mm. The thickness at the center is 8.62mm, and it has a front surface radius of curvature (R1) of 12.078mm and a back surface radius of curvature (R2) of 0mm. The lens's conic constant (K1) is -0.9820666.

The lens is coated with Edmund Optics' VIS-EXT Plus coating, which is designed to enhance its performance in the 350-700nm spectral range. This coating reduces surface reflections, improving the lens's transmission and contrast.