The W1240 N-BK7 Optical Glass Wafer from Sydor Optics is a precision-manufactured circular substrate designed for high-performance optical and photonics applications. Fabricated from N-BK7 optical glass, a widely used borosilicate crown glass known for its excellent optical clarity and stable transmission across the visible spectrum, this wafer provides dependable performance in demanding optical systems. With a 200 mm diameter and 9.9 mm thickness, it offers a robust and dimensionally stable platform for optical fabrication, system integration, and advanced research environments.

Engineered to tight optical specifications, the W1240 features a 180 mm clear aperture, <1 arc-second parallelism, and 20/10 cosmetic quality to support precise alignment and high optical performance. Additional characteristics include fine-ground edges, safety bevels, and double-side polished surfaces with <10 Å RMS roughness, along with <1/8 wave transmitted and reflective wavefront error at a 633 nm metrology wavelength. These specifications make the W1240 well-suited for laser systems, imaging equipment, instrumentation, and other precision optical assemblies where optical quality, durability, and dimensional accuracy are critical.