Method for transmittance measurements in sunglasses for a kiosk

Marcio M. Mello; M. Figueiredo; R. A. Konda; Liliane Ventura

doi:10.1117/12.2001701

26 March 2013 Method for transmittance measurements in sunglasses for a kiosk

Marcio M. Mello, M. Figueiredo, R. A. Konda, Liliane Ventura

Proceedings Volume 8567, Ophthalmic Technologies XXIII; 85671M (2013) https://doi.org/10.1117/12.2001701
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Light transmittance measurements through sunglasses lenses is one of the required tests of the Brazilian Standard NBR15111(2004). Its measurement establishes the category of the sample and determines the required ultraviolet, visible and infrared protection, as well as the attenuation coefficient for signal light recognition. However, these measurements are usually performed by spectrophotometers and educated users, who are acknowledged to manage the equipment, use the weighting functions (WF) and interpret the data. We propose an alternative method, which consists in having matching optics and electronics to obtain a close WF to be used in transmittance measurements, and create an accessible device, for public self-use, providing a simple way for measuring and educating the public about sunglasses protection. Measurements were made in 30 samples for UV test, performed for the 280 – 400nm range, where UVA and UVB light sources and two photodiode sensors with Erythema action response are assembled, and for traffic signal a visible light sensor was used with spectral human eye response and different LEDs. As for the visible test, the visible light sensor was used for different light sources: incandescent, fluorescent, and a set of LEDs, while the infrared test is performed by several LEDs that provide the 780 – 2000nm range, and an infrared sensor. For these tests, only the samples spectrum were used. The transmittances were within the deviation limit required by NBR15111. The results have led us to build a self service kiosk for public use providing the category, UV protection and IR protection of the sunglasses as well as the information regarding its use for driving.

Citation Download Citation

Marcio M. Mello, M. Figueiredo, R. A. Konda, and Liliane Ventura "Method for transmittance measurements in sunglasses for a kiosk", Proc. SPIE 8567, Ophthalmic Technologies XXIII, 85671M (26 March 2013); https://doi.org/10.1117/12.2001701

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