Ruby ball ,sapphire crystal is one of corundum gemstones. it is  mainly characterized by wear resistance, high hardness, corrosion resistance and small friction coefficient. it is an idea material for precision instrument, machinery and bearing; sapphire glass has good infrared transmission and chemical stability. it is also widely used in all aspects of infrared military equipment, such as far-infrared sight, night vision camera and so on.

1.Company Profile:

SJL LASER established in 2007, located in Shenzhen city, China. is a national high-tech enterprise integrating R&D and production of high -precision optical components. The company has a facility covering more than 5000 square meters in a high-tech park.

At present we can produce over 2000 kinds and specifications of products.

Tolerance in Diameter: +/-0.001mm

Roundness<0.4um
Out standing surface finish:20/10(Ra25nm)

2.Product Design, Dust-free Cleanroom Manufacturing Workshop, and Equipment

3.Quality Inspection 
Each product is tested to ensure the quality of export overseas, many years of product export, zero complaint rate

4.Packaging and Delivery
Professional packing ensures that the products are not damaged. We use a variety of express delivery methods to deliver goods to customers

5.Exhibition
We participate in every China International Optical Fair, Canton Fair and global exhibitions, and accept the recognition and interview of professional channels