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什么是带通滤光片:仅允许通过特定目标波段的光谱,同时阻塞通带两侧光谱的滤光片称为带通滤光片。
带通滤光片的核心作用是精准透过目标波段光谱,高效阻断通带两侧杂散光谱。按工作波段范围可以划分为紫外Uv、可见Vis、近红外Nir和中远红外IR带通滤光片。带通滤光片的通用指标(中心波长 CWL、半高宽 FWHM、峰值透过率 T%、截止深度 OD、截止范围)是选型基础;不同应用场景对滤光片的光谱性能、公差要求、环境适应性、结构形式存在显著差异,直接决定滤光片的设计方案与结构。
光学原理：介质薄膜带通滤光片通常基于法布里 - 珀罗(Fabry-Perot, FP)干涉腔原理,由高折射率(H)/ 低折射率(L)介质膜交替堆叠形成光学谐振腔；膜层光学厚度为参考波长 λ /4 的整数倍(nd=λ/4,n 为折射率)。参考波长光在膜层界面发生相长干涉,透射率最大化,形成光谱通带；非参考波长光发生相消干涉,被强烈反射,形成通带外截止区域。
带通滤光片产品采用离子辅助沉积(IAD)或离子束溅射(IBS)涂层技术(紫外和红外波段除外)。膜层结构坚固致密,工作波长稳定,可以满足室内、户外等复杂环境使用。根据工作波段可以分为紫外带通滤光片,可见光带通滤光片,近红外带通滤光片和中远红外带通滤光片。根据通带数量可以分为单带通滤光片,双带通滤光片,多通带滤光片等。我们根据带通滤光片的工作波段、光谱带宽、入射角度以及背景抑制等综合因素选择合适的镀膜材料、镀膜工艺、膜系设计和膜厚监控方案定制满足客户需求的产品。另有相当部分带通滤光片有现货库存,欢迎来电洽谈。公司拥有光学加工和光学镀膜技术丰富经验的团队,可以完成样品研发到批量生产整个流程。提供免费的技术咨询和产品性能、量产可行性评估。
典型应用场景 ：生物医疗领域荧光信号检测(荧光显微镜、流式细胞仪、qPCR、生化分析仪) ； 光学成像与机器视觉(工业相机、安防监控、显微成像、车载视觉) ； 光谱分析应用(拉曼光谱、红外光谱、紫外分光、气体检测) ； 激光类应用(激光雷达、激光测距、激光医疗、激光指示)。
| Select Bandpass Filters | |||||
|---|---|---|---|---|---|
| UV Bandpass Filters CWL:200 - 400 nm | Vis Bandpass Filters CWL:400 - 700 nm | NIR Bandpass Filters CWL:700 - 2000 nm | IR Bandpass Filters CWL:2500 - 12 000 nm | Laser line Filters FWHM:2-5nm bandwidth | Narrow Bandpass Filters FWHM:6-10nm bandwidth |
| 我们可以定制其他中心波长、光谱带宽、尺寸规格的带通滤光片。如需报价，请联系我们技术销售。 | |||||
可见Vis~近红外Nir带通滤光片
| Product No.# | Specifications | Coating | Price/pcs |
|---|---|---|---|
| BP405-20 | CWL(nm):405±2，FWHM(nm):20±2，Tpeak >80%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP460-40 | CWL(nm):460±4，FWHM(nm):40±4，Tpeak >90%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP470-30 | CWL(nm):470±3，FWHM(nm):30±3，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP485-20 | CWL(nm):485±2，FWHM(nm):20±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP530-30 | CWL(nm):530±2，FWHM(nm):30±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP535-40 | CWL(nm):535±3，FWHM(nm):40±3，Tpeak >90%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP570-30 | CWL(nm):570±2，FWHM(nm):30±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP615-30 | CWL(nm):615±2，FWHM(nm):30±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP620-40 | CWL(nm):620±4，FWHM(nm):40±4，Tpeak >90%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP630-30 | CWL(nm):630±2，FWHM(nm):30±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP650-30 | CWL(nm):650±2，FWHM(nm):30±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP660-20 | CWL(nm):660±2，FWHM(nm):20±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP685-25 | CWL(nm):685±2，FWHM(nm):25±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP685-40 | CWL(nm):685±4，FWHM(nm):40±4，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP700-30 | CWL(nm):700±3，FWHM(nm):30±3，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP730-30 | CWL(nm):730±3，FWHM(nm):30±3，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP800-30 | CWL(nm):800±3，FWHM(nm):30±3，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP810-30 | CWL(nm):810±3，FWHM(nm):30±3，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP850-50 | CWL(nm):850±5，FWHM(nm):50±4，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP905-20 | CWL(nm):905±2，FWHM(nm):20±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP940-25 | CWL(nm):940±2，FWHM(nm):25±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP940-90 | CWL(nm):940±5，FWHM(nm):90±5，Tpeak >90%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP980-40 | CWL(nm):980±5，FWHM(nm):40±5，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP1064-15 | CWL(nm):1064±2，FWHM(nm):15±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP1064-30 | CWL(nm):1064±2，FWHM(nm):30±2，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP1550-50 | CWL(nm):1550±5，FWHM(nm):50±5，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP1550-100 | CWL(nm):1550±10，FWHM(nm):100±10，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating | |
| BP1550-150 | CWL(nm):1550±10，FWHM(nm):150±10，Tpeak >85%，Blocking range:200-1200 @ OD4，size:D12mm/D25mm/Custom | Hard coating |