New Invention: 3D Laser Spectrometer

14 June 2018

A novel technology using spectroscopy to capture multiple two-dimensional spectral images from a single capture with higher light throughput. The 3D laser spectrometer design is built upon the concept from an emerging field of compressed sensing to make it possible to retrieve 3D spectral information from a screen/camera. In contrast to ordinary spectrometers, the 3D spectrometer uses a wide slit instead of a narrow slit, thus producing a higher throughput of the light and yield higher signal-to-noise ratio. The 3D spectral signal retrieved from the 3D spectrometer is robust for a further post-processing analysis.

Current spectrometers are limited to receiving signals in low light conditions due to different spectra throughput from different positions from a material. The narrow slits at the entrance of spectrometers limit the number of photons entering the spectrometer and the spectral resolution is reduced. If wider slits in a spectrometer are used, it will increase the light throughput, but it will lose the spectral resolution and has no way of distinguishing the different spectra coming from the different positions.

Static and dynamic light scattering

A novel design of spectrometer combined with advanced numerical technique makes it possible to use a wider slit to increase the light throughput, whilst maintaining the spectral resolution and obtaining all the spectra from the light coming through the slit.

This enables users to obtain multiple high-resolution images in a single capture. The retrieved 3D signal is just like a camera with additional spectral information. The 3D laser spectrometer also offers high-quality retrieved 3D spectral information which is robust for further postprocessing analysis. The 3D laser spectrometer design is simple and only requires components similar to the common spectrometers found on the market.

A patent has been filed and a prototype is available. Oxford University Innovation is seeking industrial interest from parties wishing to licence and commercialise this technology.