The olive trees are a traditional crop of the Mediterranean landscape with olive oil being the primary source of fat and one of the major components of the Mediterranean diet . The major components of olive oil are the fatty acids, of which oleic acid (mono-unsaturated fatty acid) represents 55 to 83%, linoleic acid (poly-unsaturated fatty acid) represents 4 to 21% and palmitic acid (saturated fatty acid) represents 7.5 to 20%, see Figure 1. Owing to the high amount of mono-unsaturated fatty acids, olive oil has antioxidant and anti-inflammatory properties and is essential to reduce bad cholesterol levels, therefore decreasing the risk of cardiovascular diseases .
Figure 1 – Rule Gratings
Mid-range UV wavelengths (UV-B) ranges from 280 to 315 nm and contributes around 5% to the total UV light that reaches our planet’s surface. The large fraction of UV light that reaches the planet’s surface (UV-A) ranges from 315 to 400 nm and contributes up to 95% of total UV light [1-3]. When the wavelength decreases, the spectral energy increases, and higher spectral energy raises the potential for eye damage. For ophthalmic standards, the International Organization for Standardization (ISO) 8980/3 outlines the attenuation of solar radiation for optical products at 380 nm.
However, due to the potential danger of UV-A, several organizations (World Health Organization, European Council of Optometry and Optics, and others) adopted the attenuation of solar radiation for optical products at 400 nm [4,5].
In this application note, we combine DWHP light source with a FLEX spectrometer and two lens holder to investigate the amount of ultraviolet and visible light that pass through an optical sun lens of five different sunglasses.
Figure 2 – Holographic Gratings
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Get a resumed information about the purity of olive oil samples using UV-Visible spectroscopy