SLB-25B-170P 25.0 mm Dia. x 170.5 mm FL; Double-Convex Lens Uncoated

The SLB-25B-170P is a high-quality double-convex lens, sourced from the reputable optical components manufacturer, OptoSigma. This lens, with a base shape of a circle, is designed for use in a wide range of optical applications, thanks to its precise geometry and material composition.

The lens has a diameter of 25.0 mm, making it suitable for use in compact optical systems. The edge thickness is 2.0 mm, while the center thickness is 2.9 mm, providing a robust structure that can withstand typical handling and usage. The effective focal length (EFL) of this lens is 170.5 mm, a characteristic that significantly influences the optical system's overall magnification and field of view.

The lens is made from n-BK7 Schott, a high-grade optical glass known for its excellent optical properties. This material ensures high transmittance across a wide spectrum, making the lens suitable for various wavelengths, including the visible light spectrum.

The curvature of the lens is defined by two radii: R1 is 176.46 mm, and R2 is -176.46 mm. These radii, combined with the lens's thickness, contribute to the lens's overall optical power and determine how light rays are refracted when they pass through the lens.

Notably, this lens is uncoated. While coatings can enhance a lens's performance by reducing surface reflections, increasing transmittance, or providing protection against environmental factors, an uncoated lens can be advantageous in certain applications where specific coating properties are not required.