22-995 15mm Dia. N-BK7 Precision Aspheric Lens; EFL=22.5mm; NA=0.33 VIS-EXT Plus 350-700nm

The 22-995 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 characterized by its 15mm diameter and a numerical aperture (NA) of 0.33, making it suitable for a variety of optical applications.

The lens is crafted from N-BK7, a popular material in the optical industry due to its excellent optical properties. The N-BK7 Schott glass used in this lens ensures high transmission and low dispersion, making it ideal for applications that require high image quality and color fidelity.

The aspheric design of this lens is a significant feature. Aspheric lenses are designed to reduce spherical aberration, a common issue in traditional spherical lenses. This design results in improved image quality, particularly over a wider range of wavelengths and field angles.

The lens's geometry includes an inner radius of 0mm, an outer radius of 0mm, a diameter of 15mm, and a thickness at the edge of 6.25mm. The effective focal length (EFL) is 22.5mm, and the radius of curvature (R1) is 11.63mm. The back focal length (BFL) is 16.71mm, and the thickness at the center is 8.79mm. The lens's conic constant (K1) is -0.901164.

The lens is coated with Edmund Optics' VIS-EXT coating, which is designed for high transmission within the specified wavelength range. This coating ensures optimal performance and longevity of the lens.