37-425 20mm Dia. N-SF5 Precision Aspheric Lens; EFL=20mm; NA=0.5 Uncoated

The 37-425 is a high-precision aspheric lens, part of the extensive catalog offered by Edmund Optics. This lens, with a catalog number 37-425, is designed for use with a wavelength of 587.6 nm, making it suitable for a wide range of optical applications.

The lens is made from N-SF5 Schott, a high-quality optical glass known for its excellent transmittance and low autofluorescence. The lens has a base shape of a circle, with a diameter of 20mm, providing a large surface area for light transmission. The lens's thickness at the edge is 7.23mm, and its effective focal length (EFL) is 20mm, making it a versatile choice for many optical systems.

The lens's geometry is defined by several key parameters. The inner radius is 0mm, and the outer radius is also 0mm, indicating a symmetrical design. The lens's numerical aperture (NA) is 0.5, indicating a high light-gathering capability. The lens's shape is aspheric, which means it has a non-spherical surface to reduce spherical aberration and improve optical performance.

The lens's coating is unspecified in the provided data, suggesting that it may be uncoated. This could make it more susceptible to surface reflections and scattering, but it may also make it more cost-effective and suitable for certain applications.