Ocular effects of GaAs lasers and near infrared radiation
| Autor: | R.K. Guerry, A.M. Clarke, J J Ruffolo, Harold A. Mueller, W.T. Ham |
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| Rok vydání: | 1984 |
| Předmět: |
Materials science
Optical fiber genetic structures Laser safety business.industry Materials Science (miscellaneous) Near-infrared spectroscopy Magnification Radiation Laser eye diseases Industrial and Manufacturing Engineering law.invention Wavelength medicine.anatomical_structure Optics law medicine Human eye sense organs Business and International Management business |
| Zdroj: | Applied optics. 23(13) |
| ISSN: | 1559-128X |
| Popis: | Fiber optic communication systems present a possible or potential hazard to the eyes of engineers and technicians who work with or maintain these systems. To investigate this hypothesis, the retinas of macaque monkeys were exposed to near infrared cw radiation and to GaAs lasers modulated at 22 MHz and 1600 Hz. Trained animals (two) were exposed monocularly under normal physiological conditions to modulated GaAs lasers for several months, on a 5 day/week basis, 1000 sec/day. No loss of visual function or funduscopically visible damage was detected. One of these animals was sacrificed and examined histologically for damage. No differences were detected between the foveae of the exposed and control eyes in this monkey. The radiant exposure in J · cm−2 required to produce minimal lesions was determined on anesthetized animals for cw radiation at three wavelengths (820, 860, 910 nm) and for radiation at 830 nm from a GaAs laser modulated at a digital rate of 44 Mbit/sec. It required from 6 to 8.4 mW of GaAs radiation entering the eye for periods ranging from 400 to 3000 sec to produce a detectable lesion. Since the spot size on the retina was |
| Databáze: | OpenAIRE |
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