Worst-case conditions for threshold injury on direct viewing of a cw He–Ne laser are defined. A transpupillary power of 50–100 μW for threshold injury to the eye is calculated on the basis of a heat conduction model and experimental observations.
© 1967 Optical Society of America
Original Manuscript: June 12, 1967
Published: November 1, 1967
W. P. Hansen, L. Feigen, and S. Fine, "A Worst-Case Analysis of Continuous Wave He–Ne Laser Hazards to the Eye," Appl. Opt. 6, 1973-1975 (1967)