23-867 25mm Dia. Fused Silica Precision Laser Aspheric Lens; EFL=50mm; NA=0.25 Laser V-Coat 355nm

This is a 25mm diameter Fused Silica Precision Laser Aspheric Lens, catalog number 23-867, available from Edmund Optics. It is specifically designed for use with a wavelength of 355nm and features a Laser V-Coat for optimal performance. The lens has an effective focal length (EFL) of 50mm and a numerical aperture (NA) of 0.25, making it suitable for a variety of applications.

The lens geometry includes an inner radius of 0mm, an outer radius also of 0mm, a thickness at the edge of 3.82mm, and a thickness at the center of 7.2mm. The front and back surfaces of the lens are coated with the same Laser V-Coat 355nm for consistency and durability. The aspheric shape of the lens, with a radius of curvature (R1) of 23.805mm and a conic constant (K1) of -0.663, helps to minimize spherical aberration and other optical distortions.

The lens is made from fused silica, a material known for its high transparency, chemical resistance, and thermal stability. This makes it an excellent choice for use in harsh environments or for applications that require high precision and reliability.

The item data also provides information about the lens's mounting dimensions, including the distance from the front of the lens (D Front) and the eccentricity (E Front), which can be useful for designing and implementing optical systems.