SLB-15-70NIR1 15.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 633-1064nm

The SLB-15-70NIR1 is a plano-concave lens with a diameter of 15.0 mm and a focal length of -70.0 mm, making it ideal for applications that require a negative focal length. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is available in stock for immediate use.

The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. The plano-concave geometry, characterized by a flat front surface and a curved back surface with a radius of -36.33 mm, ensures efficient light collection and focusing. The lens has a central thickness of 2.0 mm and an edge thickness of 2.8 mm, providing robustness and durability.

The SLB-15-70NIR1 is coated with Opt IR1, a broadband anti-reflection coating designed for the 633-1064nm wavelength range. This coating reduces surface reflections, enhancing the lens's transmission and overall performance. The coating is applied to both the front and back surfaces of the lens, ensuring optimal performance from all angles.

This lens is spherical in shape, a common geometry in optical systems due to its ease of manufacturing and high optical quality. The lens's inner and outer radii are both zero, indicating a uniform curvature across the entire surface.