Advanced Optics, Inc. Double Sided Optical Flats

Double sided optical flats may be used as a reference (test plate) against which the flatness of an unknown surface can be compared or as an optical window. Advanced Optics offers double sided optical flats made of low expansion borosilicate glass, fused quartz, fused silica and ZERODUR® up to 8 inches in diameter to meet various demanding applications. Surface flatness of λ/4 and λ/10 are available in low expansion borosilicate glass and λ/4, λ/10 and λ/20 in fused quartz, fused silica and ZERODUR®. In addition to our in-stock optical flats, we offer custom fabricated optical flats to meet exact customer requirements. 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.