Retinal image analysis for eye safety evaluations of products emitting optical radiation

Sebastian Kotzur; Siegfried Wahl; Annette Frederiksen

doi:10.1117/12.2545673

20 February 2020 Retinal image analysis for eye safety evaluations of products emitting optical radiation

Sebastian Kotzur, Siegfried Wahl, Annette Frederiksen

Proceedings Volume 11238, Optical Interactions with Tissue and Cells XXXI; 1123808 (2020) https://doi.org/10.1117/12.2545673
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

Optical systems emitting radiation in the visible and near infrared wavelength range represent a potential hazard for the retina of the human eye. This can result in irreparable damages due to photochemical, photothermal, photomechanical or thermomechanical interactions. To perform an eye safety evaluation a distinction must be made between coherent light sources and broadband light sources. For both types of light sources the corresponding safety standards, namely the IEC 60825-1:2014 and the IEC 62471:2006, provide accessible emission limits which depend on the angular subtense of the apparent source. This parameter is not a characteristic of the light source but must be determined by the irradiance distribution of the retinal image in case of coherent radiation and by the spectral radiance distribution of the retinal image in case of broadband radiation. This investigation introduces software-based methods investigating the retinal image in order to calculate the angular subtense of the apparent source. The results can be used to perform an eye safety evaluation in conformity with the laser safety standard IEC 60825-1:2014 as well as with the lamp safety standard IEC 62471:2006. However, the procedures given by the standards are not clearly defined. For this reason different implementations are discussed and compared to each other for a broad variety of exemplary retinal images.

Conference Presentation

Citation Download Citation

Sebastian Kotzur, Siegfried Wahl, and Annette Frederiksen "Retinal image analysis for eye safety evaluations of products emitting optical radiation", Proc. SPIE 11238, Optical Interactions with Tissue and Cells XXXI, 1123808 (20 February 2020); https://doi.org/10.1117/12.2545673

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available