A New Class of Optical Spectrometers
An optical spectrometer is the core tool for analyzing light. NLIR takes it further with patented upconversion technology — delivering unmatched speed, sensitivity, and real-time spectral measurements in the mid-infrared range (2.0 – 5.0 µm). This opens access to the molecular fingerprint region, enabling measurements beyond the reach of standard VIS/NIR spectrometers.
NLIR’s MIDWAVE Spectrometer is a fast, portable, and versatile fiber optic spectrometer for measuring mid-infrared light in the 2.0 – 5.0 μm range. Designed for applications requiring high-speed and accurate spectral measurements, it captures full spectra in milliseconds, making it ideal for both industry and laboratory.
High-Speed Fiber-Coupled Design
Our optical spectrometer connects directly via mid-IR fiber, providing flexible sampling for material characterization, optical coating analysis, gas and liquid phase monitoring, as well as characterization of light sources.
With millisecond acquisition times, it delivers the world’s fastest fiber-coupled MIR spectroscopy. Collect light from remote sampling points, harsh environments, research and development labs, or moving production lines — and analyze it instantly.
MIDWAVE Spectrometer comes with an NLIzeR Software for easy spectral analysis.
Specifications
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Why Choose NLIR?
Broadband Monitoring
Capture 2.0 – 5.0 µm full-spectrum in one shot
No cryogenic cooling
Standard CMOS detectors, robust design
Real-time measurement
Up to 130 kHz readout for real-time insight
Easy integration
Compact modules for OEMs and researchers
Optical Spectrometer for Industry & Research
NLIR’s optical spectrometer enables real-time monitoring in coatings, polymer processing, recycling, and gas sensing. OEM partners can integrate it into production lines for instant process feedback.
Multi-Gas Live Monitoring with NLIR'S Optical Spectrometer
Gases can be detected using infrared (IR) spectroscopy by measuring light in transmission. A light source sends light through a gas-filled chamber or pipe, and a spectrometer captures how the light is absorbed by the gas.
The video demonstrates this setup in action. NLIR’s FIBER Light Source delivers light through a fiber to a simple gas cell, while another fiber guides the transmitted light to NLIR’s MIDWAVE Spectrometer. The spectrometer captures spectra every 20 milliseconds, clearly showing the transmission features on screen.
Optical Coating Transmission Measurements with NLIR'S Optical Spectrometer
In this video, we demonstrate how NLIR’s MIDWAVE Spectrometer, combined with FIBER Light Source, can measure transmission spectra of optical filters in real time. With an exposure time of just 2 ms, the spectrometer captures data from every filter on the rotating wheel during each full rotation.
High-Speed plastic foil characterization with a mid-infrared optical spectrometer
This showcases how fast MIDWAVE Spectrometer is able to acquire spectral information of different plastic foils, proving the potential for in-line monitoring. This demonstrates how fast MIDWAVE Spectrometer is able to acquire spectral information of different plastic foils, showing the potential for in-line monitoring.
Measure reflection from (almost) any sample with optical spectrometer
The MIDWAVE Spectrometer is also very useful for reflection measurements due to its high sensitivity. The video demonstrates several reflection measurements on various materials using our TOUCH Interface.
Despite the sample’s curvature, the data displayed on the screen is of exceptional quality, thanks to the sophisticated internal design of the TOUCH Interface and the high sensitivity of NLIR’s MIDWAVE Spectrometer.
Scientific Research
Our Optical Spectrometer has been tested in various applications
Online characterization of mixed plastic waste using machine learning and mid-infrared spectroscopy
Accurate characterization of mixed plastic waste using machine learning and fast infrared spectroscopy
Trusted by engineers across the word
Our customers from different industries have already achieved breakthrough in spectroscopy measurements with our optical spectrometer. Read about their success stories below or contact us today.
Eliana La Francesca, PhD
Versatile characterization enabled by fiber-coupled spectrometer
We use the NLIR’s MIDWAVE Spectrometer for our calibration set-up. We appreciate the versatility of fibre coupling, the fast response of the detector and the ability to work at room temperature. All these aspects help us in the fundamental step of independent characterization of sources and optical elements.
A key device for sensitive, broadband trace gas detection
We are very satisfied with the outstanding performance of the NLIR’s upconvertion spectrometer, offering both superior sensitivity and spectral range. These advantages allowed us to develop a versatile broadband (> 600 cm-1) trace gas sensor for single species as well as fast and stable multi-species detection. It has been a pleasure working with their innovative and skilled technical team.
Associate Professor Dr. Frans JM Harren & Dr. Qing Pan
Stas Zinchik, Ph.D.
A primary instrument for our team’s fast, AI-based research activity
We have been using NLIR’s MIDWAVE Spectrometer for about two years now, successfully performing inline plastic characterization. The MIDWAVE Spectrometer has become a primary instrument for our team’s fast, AI-based plastic waste stream characterization research activity.
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