This is a G311328525 6 mm Dia. N-BAK4 Double-Convex Lens, designed with an effective focal length (EFL) of 5mm and a wavelength of 587.6nm. The lens is sourced from the reputable vendor, Qioptiq Photonics, and is available for purchase on their website.
The lens is a Spherical type, specifically a Spherical Lens (Convex-Convex), with a Base Shape of Circular. It has a diameter of 6mm and a thickness edge of 0.9mm, transitioning to a thickness center of 2.9mm. The lens's geometry is further characterized by its inner and outer radii, which are both 0 in this case.
The lens is made from N-BAK4 Schott material, a popular choice for its high refractive index and low dispersion. This makes it suitable for a wide range of optical applications.
The lens features a coating on both the front and back surfaces. The front coating is Qio Bbar Arb2nirnbk7, and the back coating is the same, ensuring optimal performance and durability.
The lens is currently in stock and can be purchased directly from the Qioptiq Photonics website. The provided weblink leads directly to the product page for your convenience.