LD1170-A N-BK7 Bi-Concave Lens; Dia:25.4 mm; f=-75.0 mm ARC 350-700nm

The LD1170-A is a high-quality bi-concave lens from Thorlabs, designed with a base shape of a circle and constructed from n-BK7 Schott glass. This lens is part of Thorlabs' extensive catalog of optical elements, offering users a reliable and efficient solution for their optical systems.

The LD1170-A has a diameter of 25.4 mm and a thickness at the edge of 5.6 mm, with a center thickness of 3.5 mm. The lens' effective focal length (EFL) is -75 mm, making it a powerful tool for focusing or diverging light beams. The radii of curvature for the first and second surfaces are -77.9 mm and 77.9 mm, respectively, resulting in a back focal length (BFL) of -75.9 mm.

This bi-concave lens is designed to work with a wavelength of 587.6 nm and features anti-reflection coatings on both the front and back surfaces, optimized for the ARC 350-700nm range. These coatings help minimize surface reflections, ensuring optimal transmission and reducing the likelihood of unwanted interference or scattering.

The LD1170-A's geometry, including its inner and outer radii, makes it suitable for a wide range of applications. Its spherical shape allows for efficient light manipulation, while the high-quality n-BK7 Schott glass ensures durability and excellent optical performance.