Why choose the sapphire?
 

Sapphire is a precious gemstone, a variety of the mineral corundum, an aluminium oxide (α-Al2O3).

The only color which sapphire cannot be is red – as red colored corundum is called ruby,

Commonly,Because of the remarkable hardness of sapphires – 9 on the Mohs scale (the third hardest mineral, after diamond at 10 and moissanite at 9.5) – sapphires are also used in some non-ornamental applications, such as infrared optical components, high-durability windows, wristwatch crystals and movement bearings, and very thin electronic wafers, which are used as the insulating substrates of very special-purpose solid-state electronics (especially integrated circuits and GaN-based LEDs).

Sapphire is the second hardest crystal next to diamonds and, because of their structural strength,

sapphire windows can be made much thinner than other common dielectric windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al2O3), and is useful in a

transmission range from 0.2 - 5.5µm.
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2.0 General describetion for optical lens:
   Grade: sapphire optical glass  no bubble ,color,
   Size: Diameter 54x30mmt±0.1mmt(pictures sample size)
   general size: dia0.5~dia300mm thickness:0.1~100mm
   surface:double side polished/(1sp,lapped)
   SD: 40/20(60/40)
   Ra:＜0.5nm(0.3nm)
  Orientation: C,R,A,M±1°,
  Tolerace:±0.02mm(0.01mm)
   Flatness: 1λ ,1/2 λ/4,
 
Sample pictures

 
We also can supply professional customized service in time and provide cooperation and support of new product development and technology appliance by Sapphire ,SiC, Ge,Quartz,GaAs etc.
 

 
FAQ:
Q: What's the way of shipping and cost?
A:(1) We accept DHL, Fedex, EMS etc.
(2) If you have your own express account, it's great.If not,
we could help you ship them. Freight is in accordance with the actual settlement.
 
Q: How to pay?
A: T/T, Paypal
 
Q: What's your MOQ?
A: (1) For inventory, the MOQ is 5pcs.
(2) For customized products, the MOQ is 10-30 pcs up.
 
Q: What's the delivery time?
A: (1) For the standard products
For inventory: the delivery is 5 workdays after you place the order.
For customized products: the delivery is 2 or 3 weeks after you place the order.
(2) For the special-shaped products, the delivery is 4 workweeks after you place the order.
 
About us
 
ZMKJ Located in SHANGHAI - one of the most famous  cities in China.
we focus on designing, producing of the synthetic sapphire and ruby bearing, marine equipments etc.
more than5 years. and have rich experice in importing and exporting.
To explore new market for our products, our company often launches various products worldwide as well.
Now, facing the keen competition of the market, and with rich experience in international trade,
we have a high reputation, good quality products and competitive price. We have had cooperation
with worldwide enterprises. We hope that our work can make your business perfect.
We are looking forward to establishing relationships with you in the near future.