Laser safety standard for skin at 1540 nm: new experiment and estimations

Alexei V. Lukashev; Sergey E. Sverchkov; Valery P. Solovyev; Boris I. Denker; Victor V. Engovatov

doi:10.1117/12.275236

2 May 1997 Laser safety standard for skin at 1540 nm: new experiment and estimations

Alexei V. Lukashev, Sergey E. Sverchkov, Valery P. Solovyev, Boris I. Denker, Victor V. Engovatov

Proceedings Volume 2974, Laser and Noncoherent Ocular Effects: Epidemiology, Prevention, and Treatment; (1997) https://doi.org/10.1117/12.275236
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

Radiant exposure of an Er-glass laser producing 50 percent probability (ED50) of a minimum erythema on porcine skin was measured in vivo for laser pulses 100 ns and 2.5 ms pulse duration. ED50 at 24 hours post-exposure was found 3.5 J/cm² for short laser pulses and 6.5 J/cm² for long ones. The single pulse dose in a chain of repetitive pulses producing minimum erythema were determined for 2ⁿ(n equals 16) pulses. The minimum reaction of skin on laser irradiance were studied for different beam diameter. The reaction of skin is mostly considered as local super heating. THe data obtained in the study are adequate to update safety standards for cutaneous injury.

Citation Download Citation

Alexei V. Lukashev, Sergey E. Sverchkov, Valery P. Solovyev, Boris I. Denker, and Victor V. Engovatov "Laser safety standard for skin at 1540 nm: new experiment and estimations", Proc. SPIE 2974, Laser and Noncoherent Ocular Effects: Epidemiology, Prevention, and Treatment, (2 May 1997); https://doi.org/10.1117/12.275236

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