Optical properties of crystal

- Aug 19, 2019-

Optical properties: the positive optical properties of an axial crystal.The axial crystal interferogram seen under orthogonal polarized light is unique. Its black cross arm does not reach the center, forming a hollow pattern, commonly known as bull's eye interferogram.The center is usually light green or pink.

1. MOQ: For most of our products, we have no MOQ, and we can provide free samples as long as you are willing to afford the delivery charge. 

2. Payment: We accept payment by T/T, Western Union, and PayPal. For high value orders, we also accept L/C payment. 

3. Location: We are a factory located in Pujiang China, an exporting major city.  

4. What we do: We make metal pins, badges, coins, medals, keychains, etc.; as well as lanyards, carabiners, ID card holders, reflective tags, silicone wristbands, bandanas, PVC items, etc..

5. Lead time: For sample making, it takes only 4 to 10 days depending on the design; for mass produc