Spot-size dependence of laser induced retinal-damage threshold

被引：0
|
作者：
Zuclich, JA [1 ]
Lund, DJ [1 ]
Edsall, PR [1 ]
Hollins, RC [1 ]
Smith, PA [1 ]
Stuck, BE [1 ]
Molin, LN [1 ]
机构：
[1] TASC, San Antonio, TX 78228 USA
来源：
ILSC'99: PROCEEDINGS OF THE INTERNATIONAL LASER SAFETY CONFERENCE | 1999年 / 4卷
关键词：
D O I：
暂无
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The dependence of retinal damage threshold on laser spot size was examined for two pulsewidth regimes; nanosecond-duration Q-switched pulses from a doubled Nd:YAG laser and microsecond-duration pulses from a flashlamp-pumped dye laser. Threshold determinations were conducted for nominal retinal image sizes ranging from 1.5 mrad to 100 mrad of visual field, corresponding to image diameters of similar to 22 mu m to 1.4 mm on the primate retina. In addition, baseline collimated-beam damage thresholds were determined for comparison to the extended source data. Together, this set of retinal damage thresholds reveals the functional dependence of threshold on spot size. The threshold dose was found to vary with the area of the image for larger image sizes. The results are compared to previously published extended source damage thresholds and to the ANSI Z136.1 laser safety standard maximum permissible exposure levels for diffuse reflections.
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页码：83 / 92
页数：10
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