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锗 (Ge)平凸透镜（PCX）
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TECHSPEC® 锗 (Ge) 平凸透镜 (PCX) 采用精密金刚石车削基片，可提供无镀膜或 3 - 12µm 的各种宽带增透镀膜选项。锗(Ge)具有化学惰性、不溶于水、努氏硬度为 780，这些特点使其非常适合需要坚固光学元件的国防、安防以及热成像应用。不过锗会出现热失控，因此应在低于 100°C 的温度下使用以确保最佳透过效果。TECHSPEC® 锗 (Ge) 平凸透镜 (PCX)直径为 12.5、25 和 50 毫米。锗的折射率很高（4.003），在没有增透镀膜的情况下会产生很大的菲涅尔反射损耗。TECHSPEC®锗（Ge）平凸透镜可提供无镀膜或多种宽带增透镀膜（BBAR），以增强在中波红外（MWIR）和长波红外（LWIR）的透过能力。
提供 3 - 5, 3 – 12 以及 8 - 12µm 的镀膜和无镀膜选项
低色散带来低色差
适合于防御、安全及热成像等应用
另有其它常见基底材料的 红外透镜 可选
由于锗的原材料供应链中断，我们的锗材料产品交付周期可能会延长，价格也可能会发生变化。如需了解更多信息，请向我们的 客服团队进行咨询。
“Edmund Optics 的该零件号剩余库存有限，一旦耗尽，由于没有原材料，将无法供应。 请联系我们的产品支持工程师，帮助您找到满足您需求的替代解决方案。客户服务部门可为您提供最新的价格和供应情况"。
产品
| 标题 | 产品编码 | Dia. (mm) | EFL (mm) | BFL (mm) | 涂层 | 涂层规格 | 基底 | 表面质量 | 中心偏（弧分） | CT (mm) | ET (mm) |
| 12.5mm Dia. x 15mm FL, Uncoated, Ge Plano-Convex Lens | 25-551 | 12.50 +0.0/-0.1 | 15.00 @ 10.6µm | 14.63 | Uncoated | Germanium (Ge) | 60-40 | <3 | 1.50 ±0.10 | 1.06 | |
| 12.5mm Dia. x 20mm FL, Uncoated, Ge Plano-Convex Lens | 25-552 | 12.50 +0.0/-0.1 | 20.00 @ 10.6µm | 19.65 | Uncoated | Germanium (Ge) | 60-40 | <3 | 1.40 ±0.10 | 1.07 | |
| 12.5mm Dia. x 20mm FL, 3 - 12μm Coated, Ge Plano-Convex Lens | 25-564 | 12.50 +0.0/-0.1 | 20.00 @ 10.6µm | 19.65 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 1.40 ±0.10 | 1.07 |
| 12.5mm Dia. x 25mm FL, Uncoated, Ge Plano-Convex Lens | 25-553 | 12.50 +0.0/-0.1 | 25.00 @ 10.6µm | 24.68 | Uncoated | Germanium (Ge) | 60-40 | <3 | 1.30 ±0.10 | 1.04 | |
| 12.5mm Dia. x 25mm FL, 3 - 12μm Coated, Ge Plano-Convex Lens | 25-565 | 12.50 +0.0/-0.1 | 25.00 @ 10.6µm | 24.68 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 1.30 ±0.10 | 1.04 |
| 12.5mm Dia. x 37.5mm FL, Uncoated, Ge Plano-Convex Lens | 25-554 | 12.50 +0.0/-0.1 | 37.50 @ 10.6µm | 37.20 | Uncoated | Germanium (Ge) | 60-40 | <3 | 1.20 ±0.10 | 1.03 | |
| 12.5mm Dia. x 37.5mm FL, 3 - 12μm Coated, Ge Plano-Convex Lens | 25-566 | 12.50 +0.0/-0.1 | 37.50 @ 10.6µm | 37.20 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 1.20 ±0.10 | 1.03 |
| 12.5mm Dia. x 50mm FL, Uncoated, Ge Plano-Convex Lens | 25-555 | 12.50 +0.0/-0.1 | 50.00 @ 10.6µm | 49.70 | Uncoated | Germanium (Ge) | 60-40 | <3 | 1.20 ±0.10 | 1.07 | |
| 12.7mm Dia. x 15mm FL, 7 - 12μm Coated, Ge Plano-Convex Lens | 74-436 | 12.70 | 15.00 | 14.4 | AR Coated: 7 - 12 µm | Ravg < 1% @7 - 12µm, Rabs < 2% @7 - 12µm | Germanium (Ge) | 60-40 | <3 | 2.50 | 2 |
| 12.7mm Dia. x 40mm FL, 7 - 12μm Coated, Ge Plano-Convex Lens | 74-438 | 12.70 | 40.00 | 39.5 | AR Coated: 7 - 12 µm | Ravg < 1% @7 - 12µm, Rabs < 2% @7 - 12µm | Germanium (Ge) | 60-40 | <3 | 2.20 | 2 |
| 25mm直径 x 25mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-649 | 25.00 +0.0/-0.1 | 25.00 @ 10.6µm | 24.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 1.95 |
| 25mm直径 x 25mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-661 | 25.00 +0.0/-0.1 | 25.00 @ 10.6µm | 24.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 1.95 |
| 25mm直径 x 30mm焦距，未镀膜，锗基底，平凸透镜 | 69-638 | 25.00 +0.0/-0.1 | 30.00 @ 10.6µm | 29.25 | Uncoated | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.13 | |
| 25mm直径 x 30mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-650 | 25.00 +0.0/-0.1 | 30.00 @ 10.6µm | 29.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.13 |
| 25mm直径 x 30mm焦距，3 - 12μm，锗基底，平凸透镜 | 87-944 | 25.00 +0.0/-0.1 | 30.00 @ 10.6µm | 29.25 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.13 |
| 25mm直径 x 30mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-662 | 25.00 +0.0/-0.1 | 30.00 @ 10.6µm | 29.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.13 |
| 25mm直径 x 35mm焦距，未镀膜，锗基底，平凸透镜 | 69-639 | 25.00 +0.0/-0.1 | 35.00 @ 10.6µm | 34.25 | Uncoated | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.25 | |
| 25mm直径 x 35mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-651 | 25.00 +0.0/-0.1 | 35.00 @ 10.6µm | 34.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.25 |
| 25mm直径 x 35mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-663 | 25.00 +0.0/-0.1 | 35.00 @ 10.6µm | 34.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.25 |
| 25mm直径 x 40mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-652 | 25.00 +0.0/-0.1 | 40.00 @ 10.6µm | 39.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.35 |
| 25mm直径 x 40mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-664 | 25.00 +0.0/-0.1 | 40.00 @ 10.6µm | 39.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.35 |
| 25mm直径 x 50mm焦距，未镀膜，锗基底，平凸透镜 | 69-641 | 25.00 +0.0/-0.1 | 50.00 @ 10.6µm | 49.25 | Uncoated | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.48 | |
| 25mm直径 x 50mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-653 | 25.00 +0.0/-0.1 | 50.00 @ 10.6µm | 49.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.48 |
| 25mm直径 x 50mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-665 | 25.00 +0.0/-0.1 | 50.00 @ 10.6µm | 49.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.48 |
| 25mm直径 x 75mm焦距，未镀膜，锗基底，平凸透镜 | 69-642 | 25.00 +0.0/-0.1 | 75.00 @ 10.6µm | 74.25 | Uncoated | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.65 | |
| 25mm直径 x 75mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-654 | 25.00 +0.0/-0.1 | 75.00 @ 10.6µm | 75.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.65 |
| 25mm直径 x 100mm焦距，未镀膜，锗基底，平凸透镜 | 69-643 | 25.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.25 | Uncoated | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.74 | |
| 25mm直径 x 100mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-655 | 25.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.74 |
| 25mm直径 x 100mm焦距，3 - 12μm，锗基底，平凸透镜 | 87-949 | 25.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.25 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.74 |
| 25mm直径 x 100mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-667 | 25.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.74 |
| 25mm直径 x 150mm焦距，3 - 12μm，锗基底，平凸透镜 | 87-950 | 25.00 +0.0/-0.1 | 150.00 @ 10.6µm | 149.25 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.83 |
| 25mm直径 x 150mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-668 | 25.00 +0.0/-0.1 | 150.00 @ 10.6µm | 149.25 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.83 |
| 25mm直径 x 250mm焦距，未镀膜，锗基底，平凸透镜 | 69-645 | 25.00 +0.0/-0.1 | 250.00 @ 10.6µm | 249.25 | Uncoated | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.90 | |
| 25mm直径 x 250mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-657 | 25.00 +0.0/-0.1 | 250.00 @ 10.6µm | 249.25 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 3.00 ±0.10 | 2.90 |
| 25.4mm Dia. x 25.4mm FL, 7 - 1μm Coated, Ge Plano-Convex Lens | 74-439 | 25.40 | 25.40 | 24.6 | AR Coated: 7 - 12 µm | Ravg < 1% @7 - 12µm, Rabs < 2% @7 - 12µm | Germanium (Ge) | 60-40 | <3 | 3.10 | 2 |
| 25.4mm Dia. x 50mm FL, 7 - 12μm Coated, Ge Plano-Convex Lens | 74-442 | 25.40 | 50.00 | 49 | AR Coated: 7 - 12 µm | Ravg < 1% @7 - 12µm, Rabs < 2% @7 - 12µm | Germanium (Ge) | 60-40 | <3 | 4.00 | 3.5 |
| 25.4mm Dia. x 75mm FL, 7 - 12μm Coated, Ge Plano-Convex Lens | 74-444 | 25.40 | 75.00 | 74.1 | AR Coated: 7 - 12 µm | Ravg < 1% @7 - 12µm, Rabs < 2% @7 - 12µm | Germanium (Ge) | 60-40 | <3 | 4.00 | 3.6 |
| 25.4mm Dia. x 200mm FL, 7 - 12μm Coated, Ge Plano-Convex Lens | 74-450 | 25.40 | 200.00 | 199.2 | AR Coated: 7 - 12 µm | Ravg < 1% @7 - 12µm, Rabs < 2% @7 - 12µm | Germanium (Ge) | 60-40 | <3 | 4.00 | 3.9 |
| 50mm直径 x 50mm焦距，未镀膜，锗基底，平凸透镜 | 69-646 | 50.00 +0.0/-0.1 | 50.00 @ 10.6µm | 48.76 | Uncoated | Germanium (Ge) | 60-40 | <3 | 5.00 ±0.10 | 2.90 | |
| 50mm直径 x 50mm焦距，3 - 5μm，锗基底，平凸透镜 | 69-658 | 50.00 +0.0/-0.1 | 50.00 @ 10.6µm | 48.76 | BBAR (3000-5000nm) | Ravg <3.0% @ 3 - 5μm | Germanium (Ge) | 60-40 | <3 | 5.00 ±0.10 | 2.90 |
| 50mm直径 x 50mm焦距，3 - 12μm，锗基底，平凸透镜 | 87-952 | 50.00 +0.0/-0.1 | 50.00 @ 10.6µm | 48.76 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 5.00 ±0.10 | 2.90 |
| 50mm直径 x 50mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-670 | 50.00 +0.0/-0.1 | 50.00 @ 10.6µm | 48.76 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 5.00 ±0.10 | 2.90 |
| 50mm直径 x 75mm焦距，未镀膜，锗基底，平凸透镜 | 69-647 | 50.00 +0.0/-0.1 | 75.00 @ 10.6µm | 74.00 | Uncoated | Germanium (Ge) | 60-40 | <3 | 4.00 ±0.10 | 2.61 | |
| 50mm直径 x 100mm焦距，未镀膜，锗基底，平凸透镜 | 69-648 | 50.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.00 | Uncoated | Germanium (Ge) | 60-40 | <3 | 4.00 ±0.10 | 2.96 | |
| 50mm直径 x 100mm焦距，3 - 12μm，锗基底，平凸透镜 | 87-954 | 50.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.00 | BBAR (3000-12000nm) | Ravg <5.0% @ 3 - 12μm | Germanium (Ge) | 60-40 | <3 | 4.00 ±0.10 | 2.96 |
| 50mm直径 x 100mm焦距，8 - 12μm，锗基底，平凸透镜 | 69-672 | 50.00 +0.0/-0.1 | 100.00 @ 10.6µm | 99.00 | BBAR (8000-12000nm) | Ravg <3.0% @ 8 - 12μm | Germanium (Ge) | 60-40 | <3 | 4.00 ±0.10 | 2.96 |
产品概览
锗因其高折射率、较大的透射距离范围和坚固的机械性能而广泛应用。锗的透射范围为 2 - 16 μm 且在可见光谱区是不透明的，因此十分适合于红外激光器应用。但是，锗会发生热逸散现象，即随着温度的升高，透射率会降低；事实上，锗在 100°C 的温度下几乎是不透明的，在 200°C 的温度下则完全没有透射性。当设计用于重量敏感系统的设备时，应考虑到锗的高密度 (5.33 g/cm3) 特性。锗的努氏硬度 (780) 大约是氟化镁的两倍，这一特点使其成为要求有坚固光学器件的红外线应用理想之选。锗不会与空气、水、碱金属和酸（硝酸除外）发生反应。
技术数据
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