Mid-infrared (mid-IR) hyperspectral imaging is of great practical interest in various fields of science and industry due to its ability to provide spatially resolved label-free chemical information. However, the widespread adoption and advancement of mid-IR hyperspectral imaging are hindered by high costs and the specification lag of mid-IR focal plane arrays. In this contribution, we propose a method to circumvent this problem and thus demonstrate a solution for mid-IR hyperspectral imaging through the use of a single-pixel imaging paradigm involving a mid-IR enhanced digital micro-mirror device (DMD); as a light source, a high-brightness mid-IR supercontinuum source is exploited. The developed mid-IR hyperspectral microscope enables the acquisition of hyperspectral cubes with dimensions of 64x64 pixels and a spectral resolution of 120 nm accomplished within approximately 450 ms. The developed laser-based system provides rapid mid-IR hyperspectral imaging with a programmable scalable field of view and variable spatial resolution. Thus, this solution represents a cost-effective alternative to state-of-the-art mid-infrared imagers.
Mid-infrared (MIR) hyperspectral imaging allows for spatially resolved chemical imaging, making it highly attractive for many branches. However, expensive MIR array detector technology limits its application. Here, we present a cost-effective MIR hyperspectral detection system based on a single-pixel imaging approach using an MIR-enhanced digital micromirror device. For illumination an MIR supercontinuum source was used completing the MIR hyperspectral microscope. It allows acquiring hyperspectral cubes with 64x64 pixels and 120 nm spectral resolution within ≈450 ms. The developed microscope provides fast MIR hyperspectral imaging with a tunable field of view and tunable spatial resolution based on cost-effective components. Thus, it will bring hyperspectral imaging into new fields and increase sample throughput due to its fast-imaging speed.
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