An optical glass window is a flat optical component specifically designed for the visible light spectrum (approximately 400–700 nm). Its primary function is to allow efficient light transmission while protecting internal precision optical systems from dust, moisture, or physical damage. These windows are typically made from high-uniformity materials such as BK7 or fused silica, featuring low scatter, low absorption, and low surface roughness. They are widely used in microscopes, camera lenses, spectrometers, and lasers.
