
Premium N-Bk7 Optical Lenses for Unmatched Clarity and Strength. High Transmittance: Transmittance exceeds 95% for optimal light efficiency. Customizable Substrate: Available in Optical Glass, Fused Silica, Bk7, Bk270, and more. Custom Surface Quality: Options include 40-20 Scratch-Dig or fully custom manufacturing. Custom Coating Wavelength: AR coating available from 430-700nm or customized per demand. Custom Sizes and Shapes: Diameter and focal length can be customized as per customer request. Strict Surface Flatness: Surface flatness guaranteed at Lambda/4 for precision applications. 3R Warranty Policy: Comprehensive return, replacement, and refund policy for inferior quality. Fast Delivery: Standard lead time of 7-10 days for quick project turnaround.