89-357 25mm Dia. Silicon Aspheric Lens; EFL=12.5mm; NA=1 Uncoated

The 89-357 is a 25mm diameter Aspheric Lens, sourced from the reputable optical components vendor, Edmund Optics. This lens, with a catalog number 89-357, is a unique piece, designed for specific optical applications. It boasts an effective focal length (EFL) of 12.5mm, making it a versatile choice for a range of optical systems.

The lens is made of silicon, identified by the material ID "silicon sal vil 1957". This material choice ensures durability and resistance to environmental factors, making it suitable for use in various conditions. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors.

The geometry of the lens is intricately designed. It has an inner radius of 0 and an outer radius of 0, indicating a circular base shape. The lens has a thickness of 2.37mm at the edge and 4.75mm at the center. The back focal length (BFL) is 10.7mm, and the numerical aperture (NA) is 1. The lens's front has a diameter of 0, with a surface sag of 3.72228e-06, a conic constant of 0, and no other surface parameters specified.

This lens is a part of the Aspheric Lens sub-type, featuring an aspheric shape. The aspheric shape allows for more precise control over the optical properties of the lens, making it suitable for high-performance optical systems. The lens's shape, combined with its silicon material and uncoated surface, makes it a unique and valuable addition to any optical system.

Please note that the lens's specifications are designed for a wavelength of 4000nm. This wavelength compatibility should be considered when integrating the lens into an optical system.

For more information, including availability and pricing, please refer to the provided weblink, which is currently valid and indicates the lens is in stock.