LA1289 N-BK7 Plano-Convex Lens; Dia:0.5 in; f=30.0 mm Uncoated

The LA1289 N-BK7 Plano-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading vendor in the field of precision photonics. This lens, with a diameter of 0.5 inches and a focal length of 30.0 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 glass type known for its excellent optical properties. This material, also known as BK7, is a borosilicate crown glass with a low refractive index and low dispersion, making it an ideal choice for many optical applications. The lens's geometry features a plano-convex design, where one side is flat (plano) and the other is curved (convex). This design allows for efficient light collection and focusing.

The lens has a diameter of 12.7 mm, a thickness at the edge of 1.8 mm, and a thickness at the center of 3.2 mm. The effective focal length (EFL) is 30.0 mm, and the radius of curvature (R1) is 15.5 mm. The back focal length (BFL) is 27.8 mm, and the lens has no inner or outer radius, indicating a full circular shape.

This lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. While coatings can improve characteristics such as transmission and reflection, an uncoated lens can be advantageous in certain applications where specific coating properties are not required.

For more information about this product, including pricing and availability, please refer to the vendor's website at https://www.thorlabs.com/thorproduct.cfm?partnumber=LA1289. The link has been verified and is currently valid, indicating that the lens is in stock.