Quartz plate or optical windows are categorized into different types based on their materials, including fused quartz, UV fused silica, infrared silica, opaque silica, K9 glass, high borosilicate glass, lead glass and more. When classified according to their shapes, quartz plate or optical glass windows are divided into round-shape window, square-shape window, triangular-shape window, elliptical window and other special-shaped windows. When classified according to their dimensions, our products are divided into large dimension window, ultra-thin window and traditional optical glass window. Moreover, they can also be classified as ordinary fire resistant window and high precision optical window.