high quality fused silica window

High quality fused silica window   Characteristics and superiority  double or single sides polished, edges chamfered or sharp, fine grounded  surfaces,  Smooth surface and low roughness,
Colorless apearance,
High flatness,     Typical applications: Semi-conductor industry,LED, lighting, sensor covers, cover glass applications,     Basic parameter for application reference:  

Parameter	Standard Grade	Precision Grade	Ultra-precision Grade
Dimensional Tolerance	+/-0.1	+/-0.1	+/-0.1
Clear Aperture	>80% to >90%	>80% to >90%	>80% to >90%
Surface Quality	80-50	60-40	40-20
Parallelism	3 arc min	1 arc min	30 arc seconds
Wavefront Distortion	5λper 25mm	1λper 25mm	λ/4
Protective Bevel	<0.25x45 deg	<0.25x45 deg	<0.25x45 deg
Coating	Optional	Optional	Optional
Dimension	Depends on material
Thickness	Depends on material

          ZCQ  Offers  Two  Major  Categories: 1. Quartz Products Series  2.Optical Glass Products Series       Packaging & Shipping package: protection paper, green air bag,  air film, carton ,                   safe and ecnomic even for freight collect as well. Shipping methods and charges: China post(15-25days) Epacket to USA (10-15days) EMS(7-10days) Fedex(5-7days) DHL(5-7days) Actual shipping charge will be calculated upon product weight.   Our Services 1.Based in Beijing, heart of China, ZCQ is a technology and quality oriented manufaturer with 20 years history. 2.With senior engineer supervise, we are glad  to advise customers on pressure, temperature etc application and engineering questions. 3.ZCQ  accepts second production in case some products don’t meet requirements.  4.1 hour from international meeting center of Beijing, ZCQ invites guests to visit our company after long day meeting and get relaxed in nature. Our company is also sitted in arms of mountains and river.