双凹透镜是一种具有两个同样弯曲的凹面和负焦距的透镜,主要用于发散光线。两侧的凹面使平行入射光线通过透镜后向外发散,形成虚焦点。
双凹透镜的特性包括在两个表面上具有相等的曲率半径和负焦距。平行入射光线在穿过透镜后发散,形成虚拟焦点。这种类型的透镜在光学系统中起着重要作用,因为它可以增加焦距并用于各种光学应用中。
光学双凹透镜在各个领域都有广泛的应用:
1,扩束: 双凹透镜通常用于扩束系统中,以通过分散光来增加光束的直径,使其适用于需要宽光束范围的应用。
2.投影应用: 在投影系统中,双凹透镜可以帮助调节和聚焦光线,确保清晰的图像显示。
3,光学系统中的焦距扩展: 通过组合双凹透镜,可以有效地扩展光学系统的焦距范围,使其适用于各种光学仪器和设备。
规格 | 商业级规范. | 高精度规格. |
材料 | UV玻璃 (石英、熔融石英) | |
VIS glass (Schott、CDGM、OHARA等) | ||
直径 | Ø5mm ~ Ø600mm | |
直径公差 | ± 0.1mm | ± 0.05mm |
焦距公差 | ± 2% | ± 1% |
表面质量 | 60/40 | 40/20 |
偏心 | <3弧最小值 | <1arc最小值 |
表面图 | 3λ | 2λ |
表面不规则 | 1/4 λ | 1/10 λ |
通光孔径 | > 85% | > 90% |
偏心 | <0.2mmx 45° | <0.1mm x 45° |
涂层 | 根据客户的要求 |
类型编号 | 直径 | 焦距 | 边缘厚度 | 中心厚度 | 后焦距 | 曲率半径 |
φD( mm) | f( mm) | Te( mm) | Tc( mm) | fb( mm) | r( mm) | |
BK7-6-6 | 6 | -6 | 3.0 | 1.5 | -6.7 | 6.75 |
BK7-10-10 | 10 | -10 | 4.6 | 2.0 | -10.3 | 10.38 |
BK7-10-15 | 10 | -15 | 3.6 | 2.0 | -15.3 | 15.57 |
BK7-10-20 | 10 | -20 | 3.2 | 2.0 | -20.3 | 20.76 |
BK7-12.7-15 | 12.7 | -15 | 4.7 | 2.0 | -15.4 | 15.57 |
BK7-12.7-25 | 12.7 | -25 | 3.6 | 2.0 | -25.4 | 59.95 |
BK7-15-15 | 15 | -15 | 5.9 | 2.0 | -15.3 | 15.57 |
BK7-15-20 | 15 | -20 | 4.8 | 2.0 | -20.3 | 20.76 |
BK7-15-50 | 15 | -50 | 3.1 | 2.0 | -50.3 | 51.90 |
BK7-20-20 | 20 | -20 | 7.1 | 2.0 | -20.3 | 20.76 |
BK7-20-30 | 20 | -30 | 5.3 | 2.0 | -30.3 | 31.14 |
BK7-20-50 | 20 | -50 | 3.9 | 2.0 | -50.3 | 51.90 |
BK7-25-50 | 25 | -50 | 5.1 | 2.0 | -50.3 | 51.90 |
BK7-25-100 | 25 | -100 | 3.5 | 2.0 | -100.3 | 103.80 |
BK7-25-200 | 25 | -200 | 2.9 | 2.0 | -201 | 204.5 |
BK7-25.4-25 | 25.4 | -25 | 8.6 | 2.0 | -25.4 | 25.95 |
BK7-25.4-50 | 25.4 | -50 | 5.2 | 2.0 | -50.4 | 51.90 |
BK7-25.4-100 | 25.4 | -100 | 3.6 | 2.0 | -100.4 | 103.80 |
BK7-25.4-200 | 25.4 | -200 | 2.8 | 2.0 | -200.4 | 207.60 |
BK7-30-30 | 30 | -30 | 9.7 | 2.0 | -30.3 | 31.14 |
BK7-30-50 | 30 | -50 | 6.4 | 2.0 | -50.3 | 51.90 |
BK7-30-60 | 30 | -60 | 5.7 | 2.0 | -60.3 | 62.28 |
BK7-30-80 | 30 | -80 | 4.7 | 2.0 | -80.3 | 83.04 |
BK7-50-50 | 50 | -50 | 15.8 | 3.0 | -50.5 | 51.90 |
BK7-50-60 | 50 | -60 | 13.5 | 3.0 | -60.5 | 62.28 |
BK7-50-70 | 50 | -70 | 11.9 | 3.0 | -70.5 | 72.66 |
BK7-50-100 | 50 | -100 | 9.1 | 3.0 | -100.5 | 103.80 |
BK7-50.8-50 | 50.8 | -50 | 16.3 | 3.0 | -50.3 | 51.90 |
BK7-50.8-60 | 50.8 | -60 | 13.8 | 3.0 | -60.5 | 62.28 |
BK7-50.8-100 | 50.8 | -100 | 9.3 | 3.0 | -100.5 | 103.80 |
BK7-50.8-150 | 50.8 | -150 | 7.2 | 3.0 | -150.5 | 155.70 |
BK7-50.8-200 | 50.8 | -200 | 6.1 | 3.0 | -200.5 | 207.60 |
BK7-50.8-250 | 50.8 | -250 | 5.5 | 3.0 | -250.5 | 259.50 |
BK7-50.8-300 | 50.8 | -300 | 5.1 | 3.0 | -300.5 | 311.40 |