89-358 25mm Dia. Silicon Aspheric Lens; EFL=25mm; NA=0.5 Uncoated

The 89-358 is a 25mm diameter Aspheric Lens, sourced from the reputable optical components vendor, Edmund Optics. This lens, with its unique silicon sal vil 1957 material composition, is designed for use in applications where high-quality imaging is required.

The lens boasts an effective focal length (EFL) of 25mm, making it suitable for a wide range of optical systems. The lens is uncoated, offering a numerical aperture (NA) of 0.5, which contributes to its high light-gathering capability. The NA is a measure of the light-gathering ability of the lens and is an important factor in determining the resolution of the image formed by the lens.

The lens geometry is meticulously designed, with an inner radius of 0 and an outer radius of 0, ensuring optimal light transmission. The lens has a thickness of 2.44mm at the edge and 3.8mm at the center, providing structural integrity while minimizing optical aberrations.

The lens's aspheric shape, defined by its radii r1 (26.922) and r2 (43.582), contributes to its high-performance imaging capabilities. The aspheric design helps to correct spherical aberration, a common issue in traditional spherical lenses, thereby improving the image quality.

The lens is designed to operate at a wavelength of 4000nm, making it suitable for a wide range of applications. The lens is currently in stock and available for immediate purchase, as indicated by its weblink status.