double side polished Al2O3 sapphire crystal watch glass lens,watch glass by sapphire,scanner cover glass by sapphire,
 
1. Comparison of  Sapphire glass 
 

1. suitable for high power,high-pressure applications and vacuum or corrosive atmospheres.

2. Sapphire is a single crystal form of alumina.The material is extremely hard and resistant to attack by srong acid.

3. It has high compressive strength, a high melting point and excellent thermal conductivity.

4. Transmission range is from 150 nm to 5 µm.
 

5. low distortion,low scatter and excellent parallelism for laser and non-laser applications.

 
Sapphire watch glass cover of applications

Specificaitons for sample in details 

 
 Sapphire glass process  step of our factory

sapphire crystal (KY)--> customized orientation rough block--> anneal 1600°-->wire saw cut-->

shape rough lapped-->chamfer---> (anneal ) ---> fine groud lapped--> polished -->check test

 

---->---->---->——>

General specifications

Diameter	0.2-300mm
Thickness	0.1-200mm
Dimension tolerance	+/-0.1mm or +/-0.02mm
Surface quality (scratch & dig)	60/40, 40/20 or better
Clear aperture	>85%, >90%
Surface accuracy	L/4, L/2, L
Parallelism	+/-3' ,+/-30''
Bevel	0.1~0.3mm x 45 degree
Coating	AR, BBAR or Custom

 

 

FAQ

 

1. How long have you been trading for?

 

5 years

 

2. How many employees do you have?

 

40 people

 

3. Do you manufacture?

Yes

 

4. Where are your manufacturing facilities based?

 

ZMKJ is at SHANGHAI city,  Factory is at wuxi Jiangsu province.

 

5. What products do you specialize in producing?

 

Optical lens, sapphire windows, sapphire substrate and other material crystal wafers.

 

6. What is your quote turnaround time?

 

1-3 days

 

7. What are your payment terms?

 

T/T;L/C  pay term by case.

 

 

Thanks~~~