Nanosecond-time-response temperature measurements using radiation thermometry during 193 nm and 247 nm pulsed light irradiation

Comparison of corneal surface temperature histories

M. Ishihara, Tsunenori Arai, S. Sato, Y. Morimoto, M. Obara, M. Kikuchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

We have developed the fast time-response measurement of thermal radiation with 15ns rise time to monitor the corneal surface temperature during ArF excimer laser ablation. In this study, we aim to investigate the influence of the relation between the corneal penetration depth and sampling depth of the measurement system on the measured temperature using 193 nm and 247 nm pulsed lights which have different penetration depths of cornea. When the sampling depth was defined as the penetration depth of cornea at the thermal radiation wavelength, we obtained about 3 μm of the sampling depth by pulsed photothermal radiometry (PPTR). In the case of the 247 nm light irradiation, where the corneal absorption coefficient at 247nm was approximately equal to that for the thermal radiation, we found that the measured temperature rises were same as the estimated temperature rises based on the photothermal process. In contrast, in the case of the 193 nm light irradiation, where the absorption coefficient at 193 nm was larger than that for the thermal radiation, we found that the measured temperature rises were lower than the estimated temperature rises.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsD.D. Duncan, S.L. Jacques, P.C. Johnson
Pages298-302
Number of pages5
Volume4257
DOIs
Publication statusPublished - 2001
Externally publishedYes
EventLaser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical - San Jose, CA, United States
Duration: 2001 Jan 212001 Jan 24

Other

OtherLaser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical
CountryUnited States
CitySan Jose, CA
Period01/1/2101/1/24

Fingerprint

time response
Temperature measurement
surface temperature
temperature measurement
Heat radiation
thermal radiation
histories
Irradiation
Radiation
irradiation
radiation
cornea
penetration
sampling
Sampling
Temperature
absorptivity
temperature
Radiometry
Excimer lasers

Keywords

  • Absorption coefficient
  • ArF excimer laser
  • PPTR (pulsed photothermal radiometry)
  • Sampling depth
  • Temperature
  • Thermal radiation
  • Time-response

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ishihara, M., Arai, T., Sato, S., Morimoto, Y., Obara, M., & Kikuchi, M. (2001). Nanosecond-time-response temperature measurements using radiation thermometry during 193 nm and 247 nm pulsed light irradiation: Comparison of corneal surface temperature histories. In D. D. Duncan, S. L. Jacques, & P. C. Johnson (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4257, pp. 298-302) https://doi.org/10.1117/12.434712

Nanosecond-time-response temperature measurements using radiation thermometry during 193 nm and 247 nm pulsed light irradiation : Comparison of corneal surface temperature histories. / Ishihara, M.; Arai, Tsunenori; Sato, S.; Morimoto, Y.; Obara, M.; Kikuchi, M.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / D.D. Duncan; S.L. Jacques; P.C. Johnson. Vol. 4257 2001. p. 298-302.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ishihara, M, Arai, T, Sato, S, Morimoto, Y, Obara, M & Kikuchi, M 2001, Nanosecond-time-response temperature measurements using radiation thermometry during 193 nm and 247 nm pulsed light irradiation: Comparison of corneal surface temperature histories. in DD Duncan, SL Jacques & PC Johnson (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4257, pp. 298-302, Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical, San Jose, CA, United States, 01/1/21. https://doi.org/10.1117/12.434712
Ishihara M, Arai T, Sato S, Morimoto Y, Obara M, Kikuchi M. Nanosecond-time-response temperature measurements using radiation thermometry during 193 nm and 247 nm pulsed light irradiation: Comparison of corneal surface temperature histories. In Duncan DD, Jacques SL, Johnson PC, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4257. 2001. p. 298-302 https://doi.org/10.1117/12.434712
Ishihara, M. ; Arai, Tsunenori ; Sato, S. ; Morimoto, Y. ; Obara, M. ; Kikuchi, M. / Nanosecond-time-response temperature measurements using radiation thermometry during 193 nm and 247 nm pulsed light irradiation : Comparison of corneal surface temperature histories. Proceedings of SPIE - The International Society for Optical Engineering. editor / D.D. Duncan ; S.L. Jacques ; P.C. Johnson. Vol. 4257 2001. pp. 298-302
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