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Proceedings Paper

Criteria for the determination of the 'thermal' retinal spot diameter
Author(s): Karl Schulmeister; Bernhard Seiser; Florian Edthofer; Ulfried Grabner; Georg Veiss
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Paper Abstract

For a given power entering the eye, the level of retinal thermal hazard depends on the retinal image size over which that power is distributed. Maximum permissible exposure limits are given in terms of the angular subtense of the apparent source α, which describes the diameter of the retinal image. Since this parameter scales the retinal thermal exposure limits (MPE), it is a direct measure of the relative thermal hazard of different retinal images, and thus should be seen as 'thermally effective' rather than 'optical' diameter of the retinal image. From the method given in IEC 60825-1 for the analysis of non-uniform sources, a general method for the analysis of non-top hat profiles was derived and is suggested as general analysis method for the angular subtense of the apparent source for a given image. This and other criteria are compared with the results of thermal models.

Paper Details

Date Published: 18 April 2005
PDF: 11 pages
Proc. SPIE 5688, Ophthalmic Technologies XV, (18 April 2005); doi: 10.1117/12.608421
Show Author Affiliations
Karl Schulmeister, ARC Seibersdorf Research GmbH (Austria)
Bernhard Seiser, ARC Seibersdorf Research GmbH (Austria)
Florian Edthofer, ARC Seibersdorf Research GmbH (Austria)
Ulfried Grabner, ARC Seibersdorf Research GmbH (Austria)
Georg Veiss, ARC Seibersdorf Research GmbH (Austria)


Published in SPIE Proceedings Vol. 5688:
Ophthalmic Technologies XV
Fabrice Manns; Bruce E. Stuck; Michael Belkin; Per G. Söderberg; Arthur Ho, Editor(s)

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