SLB-15-40NIR2 15.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

The SLB-15-40NIR2 is a Plano-Concave Spherical Lens, 15.0 mm in diameter, with a focal length of -40.0 mm, specifically designed for use within the wavelength range of 750-1550nm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry.

The lens is fabricated from n-bk7 schott, a popular material known for its excellent optical properties. The Plano-Concave geometry, characterized by its concave surface, is designed to refract and focus light. The lens has an inner radius of 0 mm and an outer radius of 0 mm, indicating a uniform curvature across its surface.

The lens features a front and back coating of opt ir2, which is specifically designed for use within the infrared spectrum. This coating enhances the lens's performance by reducing surface reflections and improving transmission within its specified wavelength range.

The lens has a thickness of 3.4 mm at the edge and 2.0 mm at the center, providing a robust structure while maintaining a sleek profile. The effective focal length (EFL) is -41.3 mm, a critical specification for determining the lens's focusing power.