SLB-25.4-250PIR2 25.4 mm Dia. x 250.0 mm FL; Coated; Plano-Convex Lens 750-1550nm

The SLB-25.4-250PIR2 is a Plano-Convex Spherical Lens, sourced from OptoSigma, with a diameter of 25.4 mm and a focal length of 250 mm. This lens is designed for use within the wavelength range of 750-1550nm, making it suitable for a variety of applications within the infrared spectrum.

The lens is constructed from n-bk7 schott, a popular material in optical applications due to its high refractive index and low dispersion. This ensures excellent image quality and color correction. The lens has a thickness of 2mm at the edge and 2.6mm at the center, providing a robust structure while maintaining a low profile.

The SLB-25.4-250PIR2 features a coating of opt ir2 on both the front and back surfaces. This coating enhances the lens' performance within the infrared spectrum, improving transmission and reducing reflection. The coating also provides protection against environmental factors, ensuring the longevity of the lens.

The lens' geometry is designed for optimal performance. The inner radius is 0, indicating a flat surface on the side facing the light source. The outer radius is also 0, meaning the lens has a uniform curvature. The radius of curvature (r1) is 129.75mm, and the back focal length (bfl) is 248.3mm, providing a long focal length for high magnification applications.