Remote Raman spectroscopy with extended measuring distance and auto-focus function for harsh environments

Markku Alamäki; Jussi Tenhunen; Risto Hyypiö; Aki P. Mäyrä; Hannu Vasama; Riku Pennala; Sanna Uusitalo; Pekka Suopajärvi

doi:10.1117/12.2582358

5 March 2021 Remote Raman spectroscopy with extended measuring distance and auto-focus function for harsh environments

Markku Alamäki, Jussi Tenhunen, Risto Hyypiö, Aki P. Mäyrä, Hannu Vasama, Riku Pennala, Sanna Uusitalo, Pekka Suopajärvi

Author Affiliations +

Proceedings Volume 11693, Photonic Instrumentation Engineering VIII; 116930C (2021) https://doi.org/10.1117/12.2582358
Event: SPIE OPTO, 2021, Online Only

Abstract

A remote and heat-resistant Raman measurement probe has been developed for timegated PicoRaman utilizing a 532 nm pulsed laser and SPAD detector. The probe has 400 mm measuring distance with automated focus detection. The focus detection enables a fast auto-focusing to a varying sample surface distance – an obligatory requirement in many industrial applications including ore mineral scanning above conveyor belts in raw material sector or the inspection of metal product consistency in metal industry lines. In addition, the Raman probe has been designed to withstand thermal loads to be suitable for hot industrial process control.

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Markku Alamäki, Jussi Tenhunen, Risto Hyypiö, Aki P. Mäyrä, Hannu Vasama, Riku Pennala, Sanna Uusitalo, and Pekka Suopajärvi "Remote Raman spectroscopy with extended measuring distance and auto-focus function for harsh environments", Proc. SPIE 11693, Photonic Instrumentation Engineering VIII, 116930C (5 March 2021); https://doi.org/10.1117/12.2582358

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