89-247 15mm Dia. x 20mm FL; YAG-BBAR Coated; Double-Convex Lens YAG-BBAR 500-1100nm

The 89-247 is a high-quality double-convex lens, 15mm in diameter and 20mm in focal length, sourced from the renowned optical components manufacturer, Edmund Optics. This lens is designed for use within the wavelength range of 500-1100nm, making it suitable for a wide array of optical applications.

The lens is constructed from n-SF11 Schott, a high-index glass with excellent transmittance properties, ensuring optimal performance across its specified wavelength range. The lens features a double-convex geometry, with radii of curvature of 30.6mm for both the front and rear surfaces, leading to a back focal length of 18.99mm. This geometry results in a high numerical aperture, making the lens ideal for imaging applications where high resolution and light-gathering capability are essential.

The 89-247 lens comes with YAG-BBAR (Yttrium Aluminum Garnet - Broadband Anti-Reflection) coatings on both the front and rear surfaces. These coatings are designed to minimize reflection losses and enhance transmission across the entire 500-1100nm spectral range. The coating's broadband nature ensures high transmission and low reflectance, making the lens an excellent choice for applications where maximum light throughput is required.