DiffuserSpec: a simple computational spectrometer using off-the-shelf diffusers

Neerja Aggarwal; Joseph D. Malone; Laura Waller; Audrey Bowden

doi:10.1117/12.2649300

9 March 2023 DiffuserSpec: a simple computational spectrometer using off-the-shelf diffusers

Neerja Aggarwal, Joseph D. Malone, Laura Waller, Audrey Bowden

Proceedings Volume PC12428, Photonic Instrumentation Engineering X; PC1242804 (2023) https://doi.org/10.1117/12.2649300
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Spectrometers are used widely in scientific applications that require wavelength-resolved optical sensing and imaging. Recently, computational spectrometers that improve on the bandwidth, resolution, and size tradeoffs of traditional spectrometers have been demonstrated using novel custom optics that are expensive to fabricate. We present a computational spectrometer that uses an inexpensive off-the-shelf diffuser to create a speckle pattern on the image sensor. By computationally inverting this spectral-spatial multiplexed pattern, we are able to reconstruct the input spectrum at nanometer-level resolution. Our computational spectrometer design has the potential to be cost-effective for applications such as reflectance spectroscopy.

Conference Presentation

Citation Download Citation

Neerja Aggarwal, Joseph D. Malone, Laura Waller, and Audrey Bowden "DiffuserSpec: a simple computational spectrometer using off-the-shelf diffusers", Proc. SPIE PC12428, Photonic Instrumentation Engineering X, PC1242804 (9 March 2023); https://doi.org/10.1117/12.2649300

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