LC4210 12.7 mm Dia. UVFS Plano-Concave Lens; EFL=-25mm Uncoated

The LC4210 is a Plano-Concave Spherical Lens with a 12.7 mm diameter, sourced from Thorlabs. This lens is designed for use in the ultraviolet-visible-near-infrared (UV-VIS-NIR) spectrum, specifically at a wavelength of 588 nm. The lens's concave shape is characterized by an inner radius of 0 and an outer radius of 0, with a center thickness of 3 mm.

The lens's effective focal length (EFL) is -25 mm, indicating that it is a diverging lens, causing incoming parallel rays to diverge after passing through it. This property makes the LC4210 suitable for applications that require beam expansion or divergence.

The lens is made from UVFS material, identified as "UVFS mal- 1965" in the item data. This material is known for its transparency in the UV-VIS-NIR range, making it an ideal choice for applications that require high transmission in this spectrum.

Notably, the lens is uncoated. While coatings can enhance the performance of lenses by reducing reflections, increasing transmission, or providing other benefits, an uncoated lens can be advantageous in certain applications. For instance, uncoated lenses can be more cost-effective and are less prone to damage from environmental factors.