Research Papers: General

Consideration of dynamic photothermal effect for evaluation of scanning light sources in optical devices using pulsed source criteria

[+] Author Affiliations
Do-Hyun Kim

US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland 20993

J. Biomed. Opt. 19(4), 045004 (Apr 25, 2014). doi:10.1117/1.JBO.19.4.045004
History: Received December 5, 2013; Revised March 25, 2014; Accepted March 26, 2014
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Abstract.  Quantitative evaluation of the potential radiation hazards of scanning light sources in medical optical devices is critical. Currently, point scanning light sources of continuous radiation are treated as pulsed sources, where the dwell time at each point is equal to the pulse duration. This study compares the photothermal effects from scanning light and pulsed sources using numerical calculation for scanning without restricting aperture and with various spot sizes. The calculation results show that the thermal damage threshold of scanning source not restricted by measurement aperture does not significantly differ from that of pulsed source. Temporal temperature response and size-dependent photothermal effect also confirm the similarity between scanning and pulsed sources.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Do-Hyun Kim
"Consideration of dynamic photothermal effect for evaluation of scanning light sources in optical devices using pulsed source criteria", J. Biomed. Opt. 19(4), 045004 (Apr 25, 2014). ; http://dx.doi.org/10.1117/1.JBO.19.4.045004


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