Laser Direct Infrared (LDIR) Imaging

Laser Direct Infrared (LDIR) Imaging is an infrared microscopy architecture that utilizes a tunable Quantum Cascade Laser (QCL) as the IR source.[1] This new reflectance-based architecture eliminates coherence artifacts typically associated with QCLs. It also allows the acquisition of large-area, high-definition IR images as well as high signal-to-noise point spectra. Extending this architecture using Attenuated Total Reflectance (ATR) allows the acquisition of high fidelity spectra from features less than 10 μm in size.[2] The application of LDIR to stain-free biochemical imaging has recently been reported,[3] with the authors citing the speed of LDIR imaging as an advantage over traditional IR imaging architectures.

## References

1. ↑ Hoke, C.; Beregovski, Y.; Ghetler, A.; Han, Y.; Moon, C.; Tella, R. (2015). "Laser Direct IR Imaging - A New Paradigm for Mid-IR Spectroscopic Imaging." (PDF). http://www.facss.org/images/pdfs/program/2015_Conf_Program.pdf.
2. ↑ Hoke, C.; Beregovski, Y.; Ghetler, A.; Han, Y.; Moon, C.; Tella, R.; Zhang, Z. (2016). "Advances in Laser Direct IR Imaging". https://www.scixconference.org/program/final-program?symposium=16IR07&p=8298.
3. ↑ Tiwari, S.; Raman, J.; Reddy, V.; Ghetler, A.; Tella, R.; Han, Y.; Moon, C.; Hoke, C. et al. (2016). "Towards Translation of Discrete Frequency Infrared Spectroscopic Imaging for Digital Histopathology of Clinical Biopsy Samples.". Analytical Chemistry 88 (20): 10183–10190. doi:10.1021/acs.analchem.6b02754. PMID 27626947.

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