The customer will be very demanding on the performance versus specifications!!!
1. Material: BK7
2. Diameter: 7.75+/-0.15mm
3. Thickness: 4.0+/-0.3mm
4. Radius: S1 -450+/-1mm. S2 -154.4+/-1mm
5. Surface finish: Scratch / Dig = 10 / 5 or better
6. Coating: S1 T =1.35+/-0.2% @ 633nm. S2 R <0.05% @ 633nm
For more information, please contact yan@tybang.com
Please contact yan@tybang.com directly. You will get the drawings from Tybang USA. Thanks for leaving your contact information here. But it is more effective if you request by email.