Tower Optical is proud to offer a diverse selection of custom circular and square windows designed to meet the unique needs of various industries. These optical windows are essential for isolating different physical environments while allowing light to pass through seamlessly. When selecting a window, it is crucial to consider the properties of the optical materials, including transmission, wavelength range, and environmental resistance. At Tower Optical, we provide a wide array of materials and anti-reflective coatings to enhance the performance of our windows. 

Our windows are meticulously crafted from high-quality materials such as BK7, UV Grade Fused Silica, and Sapphire. Each material is chosen for its superior optical properties and durability, ensuring that our windows perform optimally in demanding conditions. For those with specific requirements, we also offer custom materials upon request. Our commitment to quality is reflected in the three distinct quality standards we provide: Standard Grade, High Grade, and Laser Grade. Each standard is tailored to meet the precise needs of our clients, ensuring exceptional performance and reliability. 

At Tower Optical, precision is paramount. Our windows are manufactured with stringent dimensional tolerances and surface quality standards to guarantee optimal performance. We offer a range of specifications, including flatness, scratch/dig surface quality, thickness tolerance, and parallelism, to meet the diverse needs of our customers. Whether you require windows for standard applications or high-precision laser environments, our products are designed to deliver unparalleled accuracy and clarity.