39-514 25.4mm Dia. ZnSe Aspheric Lens; EFL=15mm; NA=0.85 BBAR 8-12µm

This is a high-quality 39-514 25.4mm Dia. ZnSe Aspheric Lens, designed and manufactured by Edmund Optics. The lens, with a catalog number 39-514, is a specialized optical component featuring an aspheric design, which provides superior image quality and optical performance compared to traditional spherical lenses.

The lens is constructed from ZnSe (Zinc Selenide) material, identified by the material ID znse marple-1964. This material is known for its excellent optical properties, including high transparency in the infrared region, making it ideal for applications such as thermal imaging, beam shaping, and other infrared-based systems.

The lens has a diameter of 25.4mm and an effective focal length (EFL) of 15mm, providing a compact and efficient optical solution. The numerical aperture (NA) is 0.85, indicating a wide acceptance angle and high light-gathering capability.

The lens features a broadband anti-reflection (BBAR) coating, specifically designed for the 8-12µm wavelength range. This coating reduces surface reflections, enhancing the transmission of light through the lens and minimizing losses due to reflection.

The geometry of the lens includes a range of parameters, such as a 0mm inner radius, a 0mm outer radius, a thickness of 1.89mm at the edge, and a thickness of 5.5mm at the center. The lens also has a front surface with a radius of curvature of 21.045mm and a back focal length (BFL) of 12.71mm.