Near Infrared 700 - 2500 nm Narrow Bandpass Filters

Near infrared narrow bandpass filters are optical filters designed to transmit a specific range of infrared wavelengths while blocking out unwanted wavelengths. These filters are essential in various applications where precise control over the infrared light spectrum is required. More on the uses and applications of near infrared narrow bandpass filters as well case study examples of filters we have manufactured can be found below.

We design and manufacture custom near infrared narrow bandpass filters between 700 nanometres to 2500 nanometres to any custom specification. We hold a wide range of stock substrates such as Glass, Silicon, Sapphire, Infrared Quartz, Calcium Fluoride and more. We also have onsite dicing, so we are able to design, manufacture and dice filters to their finished size with lead times as little as 2 weeks. Please contact us to discuss your specific requirements.

Case Studies

900nm Narrow Band Pass Filter

1940 Narrow Band Pass Filter

2100 nm Narrow Band Pass Filter

Applications

Gas and Chemical Analysis:

Narrow bandpass filters are used in gas analysis applications to selectively pass specific wavelengths of light for detecting and analysing a whole range of specific gases based on their unique absorption spectra. They are also used in NIR spectroscopy for chemical analysis, material identification, and composition testing.

Biomedical Imaging:

In NIR fluorescence imaging, narrow bandpass filters are used to selectively isolate and detect specific fluorophores that emit light in the near-infrared range. This is valuable in medical imaging for diagnostics, tumour detection, and monitoring physiological processes.

Food and Agriculture Quality Control:

NIR spectroscopy techniques using narrow bandpass filters are utilized in food and agriculture industries for quality control, food analysis, and determining nutritional content. This is done by analysing the absorption and reflection characteristics of food samples in the near-infrared spectrum.

Industrial Monitoring and Inspection:

Narrow bandpass filters are used in industrial monitoring and inspection systems for quality control, defect detection, and process optimisation. They help in analysing materials, surfaces, and components in the near-infrared spectrum.

Forensic Science, Security and Surveillance:

In forensic applications, narrow bandpass filters in the NIR range are used for document examination, fingerprint analysis, and crime scene investigations to detect hidden details and analyse materials and substances based on their NIR signatures. They also play an important role in security and surveillance applications for facial recognition, object tracking, and monitoring low-light environments.