平凸透镜一面凸面一面平面，具有正焦距，通常用于缩小光束、减小焦距或放大图像等相关应用。
为减少球差，平凸透镜用于准直光束聚焦时，光束应入射到透镜曲面上；用于点光源准直时，光束入射在平面上。
LBTEK选择使用紫外熔融石英制作多种透镜，紫外熔融石英从紫外到近红外波段都有很高的透射率，
它是应用于紫外到近红外波段透镜的理想选择。
我们的透镜均精细加工，严格管控质量，保证LBTEK以合理的价格为用户提供高质量的透镜产品。
以下列表为LBTEK同膜系平凸透镜型号：
平凸透镜 （未镀膜） | ||||
| 型号 | 直径 | 通光孔径 | 焦距 | 背焦距 |
| CX20001 | 6mm | 90%CA | 10mm | 8.2mm |
| CX10003 | 6mm | 90%CA | 15mm | 13.6mm |
| CX10202 | 9mm | 90%CA | 12mm | 9.7mm |
| CX10204 | 9mm | 90%CA | 20mm | 18.3mm |
| CX10304 | 12.7mm | 90%CA | 20mm | 17.3mm |
| CX10305 | 12.7mm | 90%CA | 25mm | 22.6mm |
| CX10307 | 12.7mm | 90%CA | 30mm | 27.8mm |
| CX10310 | 12.7mm | 90%CA | 50mm | 48.1mm |
| CX10405 | 18mm | 90%CA | 25mm | 21.3mm |
| CX10506 | 25mm | 90%CA | 25.4mm | 17.7mm |
| CX10510 | 25mm | 90%CA | 50mm | 46.6mm |
| CX10606 | 25.4mm | 90%CA | 25.4mm | 17.6mm |
| CX10607 | 25.4mm | 90%CA | 30mm | 24.2mm |
| CX10608 | 25.4mm | 90%CA | 35mm | 30.1mm |
| CX10609 | 25.4mm | 90%CA | 40mm | 35.7mm |
| CX10612 | 25.4mm | 90%CA | 75mm | 72mm |
| CX10614 | 25.4mm | 90%CA | 125mm | 122.4mm |
| CX10617 | 25.4mm | 90%CA | 200mm | 197.5mm |
| CX10619 | 25.4mm | 90%CA | 300mm | 297.3mm |
| CX10621 | 25.4mm | 90%CA | 500mm | 496.8mm |
| CX10713 | 30mm | 90%CA | 100mm | 96.5mm |
| CX10812 | 50.8mm | 90%CA | 75mm | 66.5mm |
| CX10813 | 50.8mm | 90%CA | 100mm | 93.3mm |
| CX10814 | 50.8mm | 90%CA | 125mm | 119.2mm |
| CX10818 | 50.8mm | 90%CA | 250mm | 245.5mm |
| CX10819 | 50.8mm | 90%CA | 300mm | 395.6mm |
| CX10822 | 50.8mm | 90%CA | 750mm | 745.0mm |
| CX10823 | 50.8mm | 90%CA | 1000mm | 944.3mm |
| CX10915 | 75mm | 90%CA | 150mm | 141.1mm |
| CX10917 | 75mm | 90%CA | 200mm | 192.7mm |
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