A new standard is set about the refractive property and light transmission characteristics in response to the customer's design needs. Also we present the premium standard to our valued customers.
The premium standard can be selected according to the item. We will propose you to adopt the premium standard according to your design need and specification to achieve the higher performance.
• Standards
| Standards Item | Premium standards | New standards | Conventional standards | ||
|---|---|---|---|---|---|
| 1 | Refractive Characteristic | Refractive Index ( nd) Tolerance(×10-5) |
±20 | ±30 | ±50 |
| 2 | Abbe-number (νd) Tolerance | ±0.3% | ±0.5% | ±0.8% | |
| 3 | Light transmission Characteristic | Transmittance 80% 70% 5% Wavelength (λ80 / λ70 / λ5) Tolerance |
- | ±10nm | ±10nm |
| Internal Transmittance 80% Wavelength (λτ0.8) Tolerance |
±3nm | - | - | ||
• Corresponding Types for New standards
1) Types for Glass Polished Lenses
... H series : 20 types / S series : 11 types / Ref.1 31 types
2) Types for Glass Molded Preform
... The cold process PF : 18 types / The cohotrocess PF : 27 types
• Corresponding Types for Premium standards
1) Types for Glass Polished Lenses
