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Nantong Haisheng Optical Co.,LTD
B270,Ultrawhite Glass Windows
| Colorless optical glass--B270 technology requirement | |||||
| Model | Thickness | λtj | λ0 | Tλ0 | K |
| (mm) | (nm) | (nm) | (%) | ||
| B270 | 1-5 | 310±10 | 400 | ≥89.5 | ≥1.0 |
| Nature of optical | Through rate |
|---|---|
| nd | 1.5230 |
| ne | 1.5251 |
| ve | 58.3 |
| 2mm | 91.7% |
| 4mm | 91.6% |
| 15mm | 91.0% |
| Mechanical performance | Standard value |
|---|---|
| Density | 2.55g/cm3 |
| Knoop hardness HK 100 | 542kg/mm2 |
| Young's modulus E | 71.5kN/mm2 |
| Poisson's ratio μ | 0.208 |
| Thermal properties | Standard value |
|---|---|
| Strain point | 511°C |
| Annealing Point | 541°C |
| Softening point | 724°C |
| Coefficient of thermal expansion | 9.4×10E-6/K |
| Chemical performance | Standard value |
|---|---|
| Deliquescence(ISO719) | HGB3 |
| Acid resistance(ISO1776) | 2 |
| Alkaline resistance(ISO695) | A2 |
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