Locate India
Wednesday, 24 February 2016
   

welcome to River Miners Company Ltd.



CONTACT US

Contact Person: Mr.alusine A.m.bah

Address: 40, Wilberforce Spur Road, Freetown Sierra Leone

Freetown , Western , Sierra Leone - 00232

Phone:00-23230-416558

Mobile:

Email: riverminerscompany@gmail.com



OUR PRODUCTS

Metal Wheels

We have been offering solid gold bars, white gold dust, used copper, used rail wheels and so on.


Metalized sapphire window

Metalized sapphire windows are created by applying thin layers of chrome, nickel and gold around the edge of a sapphire window. This metalized edge creates a surface that can be soldered or bonded directly into your opto-mechanical assembly allowing you to create a hermetic seal. Hermetically sealed optics is used in a variety of applications ranging from infrared imaging systems to medical devices. Technical capability Material: optical sapphire (Al2O3) Diameter tolerance: +0, -0.1mm Thickness tolerance: +/-0.05mm Clear aperture: 90% Surface quality: 80-50 scratches and digs Surface accuracy: 2 lambdas per 25.4mm @ 632.8nm Parallelism: < 3 minutes Coating: AR coating, T > 98% @ 1260-1600nm Metalizing: Chrome, Nickel, and Gold; sputtering method or screen printing method




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