Optical glass is a high-quality glass specifically manufactured for use in lenses, prisms, and other precision optical components. It is designed to be free from defects and distortion, while also being resistant to heat, humidity, and other environmental factors that could affect image quality.
Each type of optical glass is classified according to its refractive index and dispersive properties, which determine how it bends and separates light. Photographic lenses often incorporate two or more types of optical glass to correct aberrations and produce sharp, accurate, and colour-corrected images, making it a critical material in lens design and manufacturing.