SLB-50.8B-200PIR2 50.8 mm Dia. x 201.0 mm FL; Coated; Double-Convex Lens 750-1550nm

The SLB-50.8B-200PIR2 is a 50.8 mm diameter, double-convex lens with a focal length of 201.0 mm, specifically designed for use in the 750-1550nm wavelength range. This lens is sourced from OptoSigma, a renowned vendor in the optical industry.

The lens is made from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. The double-convex geometry, with radii of curvature of 207.6 mm for the first surface and -207.6 mm for the second, ensures a high numerical aperture and low spherical aberration.

The lens has a central thickness of 6 mm and an edge thickness of 2.9 mm, providing rigidity and resistance to deformation. The back focal length is 199 mm, and the effective focal length is 201 mm, offering a wide field of view and high resolution.

The lens is coated with Opt IR2, a broadband anti-reflection coating that enhances transmission in the 750-1550nm range. This coating reduces surface reflections, improves contrast, and increases the overall efficiency of the optical system.