LE7031-F 25.4 mm Dia. ZnSe Positive Meniscus Lens; EFL=100mm 8-12µm

The LE7031-F is a high-quality spherical lens from Thorlabs, featuring a positive meniscus design with a diameter of 25.4 mm. This lens is specifically designed for use with infrared wavelengths, particularly between 8-12 µm, making it ideal for a range of applications in this spectrum.

The lens is constructed from ZnSe (Zinc Selenide), a material known for its excellent transmission properties in the infrared region. The ZnSe is of the 'connolly' variety, ensuring consistent quality and performance. The lens features an effective focal length (EFL) of 100 mm, providing a good balance between field of view and focus.

The LE7031-F has a front and back coating of tho znse-arced 8-12, which are specifically designed to enhance the lens' performance in the 8-12 µm range. The center thickness of the lens is 4 mm, while the edge thickness is 3.6 mm, providing a robust and durable design.

The lens geometry includes an inner radius of 0 mm and an outer radius of 0 mm, indicating a simple, straightforward design. The back focal length (BFL) is 91.8 mm, which should be taken into account when designing optical systems involving this lens.

According to the vendor, Thorlabs, this lens is currently in stock, and the web link provided leads to a page with more detailed information. This lens is a great choice for anyone needing a high-quality, reliable lens for use in the infrared region.