The 89-248 is a high-quality double-convex lens, sourced from the renowned optical components manufacturer, Edmund Optics. This lens boasts a diameter of 15mm and a focal length of 22.5mm, making it suitable for a wide range of optical applications.
The lens is crafted from n-sf11 Schott, a high-index glass material known for its excellent optical properties. This material ensures high dispersion and low auto-fluorescence, making it ideal for applications that require high precision and low background noise.
The 89-248 features a YAG-BBAR coating on both the front and back surfaces. This coating, which stands for Yttrium Aluminum Garnet - Broad Band Anti-Reflection, is designed to minimize reflection and maximize transmission across the 500-1100nm wavelength range. This makes the lens particularly suitable for use in systems that operate in the visible to near-infrared spectrum.
The lens geometry is characterized by its double-convex shape, with radii of curvature of 34.36mm for both the front and back surfaces. This shape provides a large acceptance angle and excellent image quality, making the lens ideal for use in imaging systems.