90mm diameter high purity silica glass round window

Fused Silica is offered in many different grades to support various product applications. Glass codes 7980, 7979, and 8655 are high purity non-crystalline silica glasses with excellent optical qualities.
Product characteristics include extraordinary low refractive index variations leading to state-of-the-art homogeneity values, lowest birefringence values, large size capabilities, exceptional transmittance from the deep ultraviolet through the infrared region, and an ultra-low thermal expansion coefficient; all of which are critical to our customers' demanding needs.

High Purity Silica Windows are used as a protective element between two environments.Standard Optical Windows are optical glass with ground and polished faces that are relatively parallel. High Precision Optical Glass Window are used to isolate two physical environments while allowing light to pass. Optical Windows made of BK7 material have high transmission in the visible spectral region, do not scratch easily, do not degrade under normal operating environment and hence do not need any special precaution or treatment. Anti-Reflective Coating will provide higher transmission.

Optical Round Window,quadrate window, triangular optical windows, or other polygonal optical window, and Irregular Window are also available upon request. 

Specification of our High precision optical glass window as follow:
*Material:high purity silica windows,B270 optical glass windows, BK7 windows, fused silica windows or other optical crystals materials, Caf2 Window, Zinc Selenide Windows etc.
*Length tolerance:+/-0.01
*Width tolerance:+/-0.01
*Center thickness tolerance:0.005mm
*Surface quality:80-50 to 10-5 Scratch/Dig
*Surface flatness:
*Parallelism<=1min -- 2sec
*Clear Apenture:80% -- 100%