SLB-25-150NIR1 25.0 mm Dia. x -150.0 mm FL; Coated; Plano-Concave Lens 633-1064nm

This is a Plano-Concave Spherical Lens, type SLB-25-150NIR1, manufactured by OptoSigma. The lens has a diameter of 25.0 mm and a focal length of -150.0 mm, making it a negatively powered lens. The lens is made of n-bk7 schott material, a popular choice for its high refractive index and low dispersion.

The lens's geometry includes a thickness edge of 3.0 mm and a thickness center of 2.0 mm. The inner radius is 0.0 mm, and the outer radius is also 0.0 mm, indicating a flat surface on one side and a concave surface on the other. The lens's back focal length is -151.3 mm, slightly longer than its effective focal length due to the thickness of the lens.

The lens is coated with opt ir1 on both the front and back surfaces. This coating is specifically designed for the infrared spectrum, making it suitable for use in applications involving wavelengths between 633nm and 1064nm. The coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency and quality of the optical system.