17-156 25mm Dia. L-BAL35 Precision Molded Aspheric Lens; EFL=25mm; NA=0.5 Uncoated

The 17-156 25mm Dia. L-BAL35 Precision Molded Aspheric Lens is a high-quality optical component sourced from Edmund Optics. This lens, with a catalog number 17-156, is designed for use in a wide range of optical applications, thanks to its precision molded aspheric design and uncoated surface.

The lens features a base shape of a circle, with a diameter of 25mm. It has an effective focal length (EFL) of 25mm, making it suitable for systems where a compact, high-performance lens is required. The lens's numerical aperture (NA) is 0.5, indicating a wide acceptance angle and high light-gathering capability.

The lens is made from L-BAL35, a material from Ohara, which is known for its excellent optical properties. The lens's geometry includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 1.74mm, and a thickness at the center of 7.5mm. The back focal length (BFL) is 20.28mm.

The lens's aspheric design is defined by its conic constant (k1) of -1.439137 and its aspheric coefficient (k2) of 0. The uncoated surface of the lens ensures high transmission across a broad spectrum but may have higher reflectivity compared to coated lenses.

The lens's web links are valid and indicate that it is in stock, making it readily available for immediate use in your optical system.