Analysis of the Effect of Natural and Simulated Sun Exposure on Sunglasses Lenses: A Study on Materials Degradation

Autor(es)

Gomes, Leonardo Mariano ; Masili, Mauro ; Ventura, Liliane ; Henriques, J ; Neves, N ; DeCarvalho, P

• Tipo de documento: Artigo Científico
• Fonte: XV MEDITERRANEAN CONFERENCE ON MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING - MEDICON 2019; v. 76, p. 11-pg., 2020-01-01.

Resumo

This work aimed to investigate the degradation of sunglasses lenses after a short period of exposure to solar radiation in two different ones. A set of 30 pairs of sunglasses lenses was tested, and the right lenses were exposed in an automatic sun exposure station, i.e. under natural conditions, and the left lenses were exposed in a solar simulator according to the parameters of the standard. In the solar station, the total exposure time was 115 h and in the solar simulator, 100 h. Lens spectroscopy measurements were taken before and after the exposure period for each experiment, and the UV, Visible and Infrared (IR) transmittances of the lenses were calculated by means of these measures, in addition to the accumulated erythemal UV radiation dose for both conditions. Exposure time was not sufficient to cause degradation of the lenses, but it was possible to verify some characteristics, such as differences between lenses of the same model, and differences between the conditions of the experiments that may influence the future results and the degradation of the lenses. (AU)

• Processo FAPESP: 18/16275-2 - Estudo continuado dos requisitos de normas em óculos de sol para a proteção ocular efetiva
• Beneficiário: Liliane Ventura Schiabel
• Modalidade de apoio: Auxílio à Pesquisa - Regular