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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 7, Iss. 2 — Feb. 1, 1968
  • pp: 325–329

Measurement of Light Scattered by Eye Protection Filters

Georg Bauer, Hans-Joachim Hübner, and Ernst Sutter  »View Author Affiliations


Applied Optics, Vol. 7, Issue 2, pp. 325-329 (1968)
http://dx.doi.org/10.1364/AO.7.000325


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Abstract

In order to characterize the light scattered by eye protection filters a reduced luminance coefficient l* = Ls/τE is defined: Ls luminance of scattered light, τ directional transmittance of the filter, E illuminance of incident radiation. The possibilities of measuring this quantity, which is specific for the material concerned [unit (cd/m2)/lx = sr−1] are discussed, and a method is described which also fulfills the ophthalmological conditions; this is demonstrated for filters used in welding. By comparison measurements with an earlier American method, which gives the percentage of the scattered light, it is shown that a value l* = (1 cd/m2)/lx is equivalent to 0.8% scattered light.

© 1968 Optical Society of America

History
Original Manuscript: September 28, 1967
Published: February 1, 1968

Citation
Georg Bauer, Hans-Joachim Hübner, and Ernst Sutter, "Measurement of Light Scattered by Eye Protection Filters," Appl. Opt. 7, 325-329 (1968)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-7-2-325

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