LC7142-E3 25.4 mm Dia. ZnSe Plano-Concave Lens; EFL=-200mm 7-12µm

The LC7142-E3 is a 25.4 mm diameter ZnSe plano-concave lens, specifically designed for use in the infrared spectrum with a wavelength of 10600 nm. This lens is sourced from Thorlabs, a reputable vendor known for their high-quality optical components.

The lens features a concave shape with a center thickness of 2 mm, and an effective focal length (EFL) of -200 mm. This negative focal length indicates that the lens will diverge light, making it suitable for applications such as beam expansion or collimation. The lens's inner and outer radii are both 0, indicating a plano surface on one side and a concave surface on the other.

The LC7142-E3 is made from ZnSe (Zinc Selenide), a material known for its excellent transmission properties in the infrared region. The lens is coated with Thorlabs' E3ZnSeARC coating, which is designed to enhance the lens's durability and optical performance in the 7-12 µm range.

This lens is part of Thorlabs' extensive catalog of optical elements, and is available for purchase directly from their website. According to the vendor, the lens is currently in stock, ensuring quick delivery times for your optical projects.