EUROLAB, together with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of EN ISO 20473 testing. EN ISO 20473 specifies the division of optical radiation into spectral bands for optics and photonics. It does not apply to lighting or telecommunications applications, or to protection against hazards from optical radiation in occupational areas.
Most resin ophthalmic lenses, even if uncoloured, have good absorption in the 315 nm to 380 nm waveband, or can be treated without discoloration to have good absorption.
Some resin materials cannot be treated to absorb the 380 nm to 400 nm waveband, while others that can be treated in this way begin to show a pale yellow color change. This can be masked by adding a very small amount of blue dye, but this then causes a decrease in the light transmittance of the lens.
Two factors influence the effects of UV radiation for the unprotected eye: first, the intensity of solar radiation rises rapidly from the UV-B region to the infrared region; secondly, the bioactinic effect, or the ability of radiation to cause damage, declines rapidly. The product of the solar spectral radiation and the relative spectral efficiency function is the weighting function for calculating the effect of solar radiation on the eye.
Classifying the incremental waveband from 380 nm to 400 nm as UV rather than the visible spectrum has little effect on eye protection for the normal wearer, due to the low value of the weighting function towards the longer wavelength end of the UV-A spectrum.
EUROLAB assists manufacturers with EN ISO 20473 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
