LB1494 N-BK7 Bi-Convex Lens; Dia:9.0 mm; f=12.0 mm Uncoated

The LB1494 N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading global manufacturer of photonics equipment. This lens, with a diameter of 9.0 mm and a focal length of 12.0 mm, is designed for use in a wide range of optical systems, including imaging, beam shaping, and laser applications.

The lens is made from N-BK7, a popular borosilicate glass known for its excellent optical properties. This material is chosen for its low dispersion and high transmission across a broad spectrum, making it ideal for applications that require high-precision optics. The lens features a bi-convex geometry, meaning it has two spherical surfaces that are both convex, or outwardly curved. This shape is designed to minimize spherical aberration, a common optical distortion that can degrade image quality.

The geometry of the lens includes a thickness of 1.8 mm at the edge and 3.6 mm at the center. The effective focal length (EFL) is 12.0 mm, while the back focal length (BFL) is 10.7 mm. The radii of curvature for the first and second surfaces are 11.7 mm and -11.7 mm, respectively. The lens is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces.

According to the vendor's website, this item is currently in stock, indicating its availability for immediate purchase and delivery. The website also provides further technical specifications and application notes, which can be valuable resources for those considering this lens for their optical systems.