Windows are applied to isolate different physical environments while allowing light to pass. When selecting windows you should consider materials, transmission, scattering, wave front distortion, parallelism and resistance to certain environment. China star optics offers a wide range of different materials and different degree of precision windows.

Specification of our optical windows as follow:
*Material: Bk7 or other materials
*Length tolerance:+/-0.01
*Width tolerance:+/-0.01
*Center thickness tolerance:0.005mm
*Surface quality:80-50~10-5
*Surface flatness<λ~λ/20
*Parallelism<=1min~2sec
*Clear Apenture:80%~100%