SLB-40-90PIR2 40.0 mm Dia. x 90.0 mm FL; Coated; Plano-Convex Lens 750-1550nm

The SLB-40-90PIR2 is a Plano-Convex Spherical Lens, sourced from OptoSigma, a renowned optical elements vendor. This lens, with a diameter of 40.0 mm and a focal length of 90.0 mm, is designed for use within the wavelength range of 750-1550nm, making it suitable for a wide range of optical applications.

The lens is fabricated from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. The Plano-Convex geometry, with a center thickness of 6.5 mm and an edge thickness of 2 mm, ensures efficient light transmission and minimal distortion. The lens's effective focal length (EFL) is 90.0 mm, and the back focal length (BFL) is 85.7 mm, providing a long focal length that is beneficial in many optical systems.

The SLB-40-90PIR2 features a coating of opt ir2 on both the front and back surfaces. This coating enhances the lens's performance within its specified wavelength range, improving its transmission characteristics and reducing surface reflections. The lens's circular base shape and spherical shape further contribute to its optical efficiency.