Advanced Optics, Inc. Single Sided Optical Flats

Single sided optical flats are used as a reference (test plate) against which the flatness of an unknown surface can be compared. Advanced Optics offers single sided optical flats made of low expansion borosilicate glass, fused silica, fused quartz and ZERODUR® up to 8 inches in diameter. Surface flatness of λ/4, λ/10 and λ/20 are available in fused silica, fused quartz or ZERODUR© and λ/4 and λ/10 in low expansion borosilicate glass. Optical Flat Specifications: Many of our optical flats are manufactured out of synthetic fused silica, which provides superior transmission characteristics, a high degree of purity, exceptional environmental durability, and a low coefficient of thermal expansion. Due to these attributes, our double sided optical flats can be used as an optical window. In addition to our in-stock optical flats, we offer custom fabricated optical flats to meet exact customer requirements.