Open Source Smartphone-based

Self-Referencing Spectrometer

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Objective

To provide educators and students with Open Source Software, Hardware Designs, and tutorials for learning how to design and build a Smartphone-based Self-Referencing Spectrometer to measure spectral components of a physical characteristics.


Why use a self-referencing spectrometer?

Wavelength accuracy of typical spectrometers must be calibrated in advance to establish the relation between the pixel number and the associated wavelength by means of a calibration lamp with known emission line wavelengths. In addition, a recalibration has to be performed periodically since the pixel number versus wavelength relation can change with variations of the auto-focusing lens position commonly occurs in smartphones. Given that this calibration procedure has to be performed off-line, it would be desirable to address the need for a smartphone-based optical spectrometer that has simultaneous self-referencing and spectrum measurement capabilities to achieve excellent wavelength reproducibility.


Aim of Project EigenCAM

It is therefore an aim of Project EigenCAM to provide a novel spectrometer system that can simultaneously self-referencing and measuring spectral characteristics in real time with the use of software App. The concurrent measure and self-calibrate capabilities makes it possible as an attachment spectrometer on a mobile computing device without requiring an off-line calibration.