customize sizes precision B270 windows

Standard optical Windows are optical glass with ground and polished faces that are relatively parallel. Standard optical windows are used to isolate two physical environments while allowing light to pass. Standard Optical Windows can be coated to meet your specific application requirements.
Optical windows can be made from different materials. Such as N-BK7 optical round window, B270 high precision optical glass window, Fused silica optical round window, sapphire window, Calcium fluoride window, Silicon window, Borofloat window, high borosilicate glass window and other optical glass supplied by Schott and Chinese CDGM are available upon request. 
Windows at shape of optical round window,quadrate glass window , triangular window or other polygonal window and irregular window are also available upon request.
In addition, we provide a variety of  single layer or multiplayer anti-reflecting coating,HR,PR coatings on optical windows.  

                         B270 standard optical windows

Specification of our standard optical windows and high precision optical glass window as follow:
*Material:high borosilicate glass round window,B270 optical window, BK7 high precision optical glass window,UV-grade fused silica (JGS1) or other optical infrared window.
*Length tolerance:+/-0.01
*Width tolerance:+/-0.01
*Center thickness tolerance: 0.005 mm
*Surface quality:80-50 to 10-5 Scratch/Dig
*Surface flatness:<lambda to lambda/20
*Parallelism<=1 min -- 2 sec
*Clear Aperture:80% -- 100%