355390 4.5 mm Dia. D-ZLAF52LA Molded Glass Aspheric Lenses; EFL=2.8 mm; NA=0.55 Uncoated

The 355390 4.5 mm Dia. D-ZLAF52LA Molded Glass Aspheric Lenses are high-quality optical components designed for a wide range of applications. These lenses, sourced from Thorlabs, are molded from D-ZLAF52LA glass, a material known for its excellent optical properties.

The lenses feature an EFL (Effective Focal Length) of 2.8 mm, making them suitable for use in systems where a compact, high-performance lens is required. The NA (Numerical Aperture) of these lenses is 0.55, indicating a wide acceptance angle and high light-gathering capability.

The lenses are aspheric in shape, which means they have a non-spherical surface designed to reduce spherical aberration and provide superior image quality. The base shape of these lenses is circular, ensuring a consistent and uniform optical path.

The lenses are uncoated, meaning they do not have any additional layers to enhance their optical properties. However, this does not affect their performance in many applications, and it also makes them more cost-effective.

These lenses have a diameter of 4.5 mm and a thickness at the edge of 1.13 mm. The thickness at the center is 1.9 mm. The lenses also have a series of aspheric coefficients (k1, k2, a2, a4, a6, a8, a10, a12, a14, and a16) that define their precise shape and optical properties.