LA1145 N-BK7 Plano-Convex Lens; Dia:2 in; f=75.0 mm Uncoated

The LA1145 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 2 inches and a focal length of 75.0 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 characterized by a high refractive index and low dispersion, making it ideal for applications that require high image quality and color correction. The lens has a plano-convex geometry, meaning one side is flat while the other is curved, which focuses light onto a single point.

The geometry of the LA1145 lens includes a diameter of 50.8 mm, an edge thickness of 3 mm, and a center thickness of 12.5 mm. The effective focal length (EFL) is 75 mm, and the radius of curvature (R1) is 38.6 mm. The back focal length (BFL) is 66.5 mm, and the lens has no inner or outer radius, indicating a flat surface on the non-curved side.

This lens is uncoated, meaning it does not have any anti-reflective coatings. While this may result in higher reflective losses, it also means the lens is more versatile and can be used across a broader spectrum of wavelengths. The lack of coating also makes the lens more robust and resistant to environmental factors such as dust and moisture.