17-082 25mm Dia. L-BAL35 Precision Molded Aspheric Lens; EFL=25mm; NA=0.5 Uncoated

The 17-082 is a precision molded aspheric lens, designed and manufactured by Edmund Optics. This lens is characterized by its 25mm diameter and a numerical aperture (NA) of 0.5, making it suitable for a wide range of optical applications. The lens is made from L-BAL35, a material from Ohara, which is known for its excellent optical properties.

The lens has an effective focal length (EFL) of 25mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity. This EFL makes the lens versatile and adaptable to various optical systems. The lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. However, its asphere shape helps to reduce spherical aberration, a common issue in optical systems.

The lens's geometry is carefully crafted to ensure optimal performance. It has an inner radius of 0mm and an outer radius of 0mm, indicating a circular shape. The thickness at the edge is 1.74mm, while the thickness at the center is 7.5mm. The lens's front surface has a radius of curvature (R1) of 14.728mm and is flat (R2=0). The back focal length (BFL) is 20.28mm.

The lens's NA is 0.5, which is a measure of the light-gathering ability of the lens. A higher NA allows for a narrower depth of field and a higher resolution, making this lens suitable for high-precision applications. The lens's shape is aspheric, which means it has a non-spherical surface to correct for spherical aberration and other optical aberrations.