SLB-50-170NIR1 50.0 mm Dia. x -170.0 mm FL; Coated; Plano-Concave Lens 633-1064nm

The SLB-50-170NIR1 is a Plano-Concave Spherical Lens, 50.0 mm in diameter, with a focal length of -170.0 mm, sourced from OptoSigma. This lens is designed for use within the wavelength range of 633-1064nm, making it suitable for a variety of applications in the near-infrared spectrum.

The lens is fabricated from n-bk7 Schott glass, a popular material for its high refractive index and low dispersion. This ensures excellent image quality and color correction. The lens has a thickness of 6.6 mm at the edge and 3 mm at the center, providing a robust structure while maintaining a sleek profile.

The SLB-50-170NIR1 features an Opt IR1 coating on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission within the specified wavelength range. The coating also provides protection against environmental factors, ensuring the longevity of the lens.

The lens's geometry is defined by a radius of curvature of -88.23 mm on the concave surface, resulting in a back focal length of -172 mm. The lens has no inner or outer radius, indicating a uniform curvature across the surface.