G313206329 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-30mm 1064nm

This is a G313206329 double-concave lens, sourced from the renowned optical components manufacturer, Qioptiq Photonics. The lens boasts a 22.4 mm diameter and a center thickness of 1.5 mm, making it a robust and compact solution for various optical applications.

The lens is made of N-BK7, a popular borosilicate crown glass known for its excellent optical properties, including a high refractive index and low dispersion. This material makes the lens suitable for use across a wide range of wavelengths, with the item data specifying a wavelength of 588 nm.

The lens features a double-concave geometry, with radii of curvature of -31.396 mm for the front surface and 31.396 mm for the rear surface. This geometry results in a negative focal length of -30 mm (EFL), making it ideal for use in applications requiring image reduction or beam convergence.

The lens comes with anti-reflective coatings on both the front and back surfaces, specifically the Qio HP Nbar ARHS-YAG coating. This coating is designed to minimize reflection losses at the YAG laser wavelength of 1064 nm, thereby enhancing the overall transmission efficiency of the lens.