Complaint
The company can provide H-K9L, H-K9LGT high-uniformity bulk optical glass, which has the advantages of good optical uniformity and stress uniformity, small stress birefringence, etc., and is used in astronomy, aerospace, industry and other fields.
Optical uniformity
Optical uniformity refers to the degree of uniformity in the refractive index of each part of a piece of glass. For optical glass used in high-precision optical systems, the refractive index change in each glass must be small, that is, the optical uniformity is good. The optical uniformity index should be determined according to the application and the final geometric size of the optical element.
Optical uniformity is represented by the maximum value Δnmax of the refractive index difference between various parts in a piece of glass.Measured according to the test method specified in GB/T7962.2-2010, divided into 4 categories, see the table below.
| Category | Δnmax |
| H00 | 0.5×10-6 |
| H0 | 1×10-6 |
| H1 | 2×10-6 |
| H2 | 5×10-6 |
| H3 | 10×10-6 |
| H4 | 20×10-6 |
Q: Are you factory, or only a trading company?
A: Factory, and our factory is located in Wangtong town, Jing county, Hengshui, Hebei.
Q:How does your factory do regarding quality control?
A:We do leak test for 3 times before packing.
Q:Could I get some samples, and how?
A: Sure, free sample can be provided for testing quality. Please contact us for samples.
Q: Can you give me some discount?
A: Usually the discount depends on the quantity. However we can discuss it.
Q: What's the payment terms?
A: Our normal practice: 30% deposit of total amount before production, and 70% balance payment before shippment. However this is open for discussion.
