雙凹透鏡
雙凹面透鏡用於光束擴展，圖像縮小或光投影應用。這些透鏡也是擴展光學系統的焦距的理想選擇。雙凹面透鏡具有兩個凹面，是具有負焦距的光學透鏡。
無鍍膜，這些鏡片有防反射塗層選項
• 光學均勻性：< 8 x 10-6
• 熱膨脹係數：0.58 x 10-6 /K (0℃ - 200℃)
| Specifications | |
| Material | BK7 or UV Fused Silica |
| Dimension Tolerance | +0/-0.2mm |
| Thickness Tolerance | ±0.2mm |
| Design Wavelength | 546.1nm |
| Surface Quality | 60/40 scratch and dig |
| Flatness | λ/4@632.8nm |
| Centration | <3 arc minutes |
| Focal Length Tolerance | ±2% |
| Clear Aperture | >90% |
| Chamfer | Protective <0.5mmx45deg |
| Coating | None |
| Products | Part Number/Description | Delivery | Price | Qty. | Add to Cart |