Bazı Organik Gözlük Camlarının Spektral ve Optik Özelliklerinin İncelenmesi

Bu araştırmada, görme gereci olarak kullanılan organik gözlük lenslerinin spektral ve optik özellikleri ultraviyole ve görünür ışık dalga boyu aralıklarında Jasco V-730 UV/VIS spektrofotometre cihazı kullanılarak analiz edildi. Elde edilen sonuçlar incelenen lens örneklerinde insan gözünün en duyarlı olduğu dalga boyu (550nm) aralığında ışık geçirgenliğinin %80’nin üzerinde olduğunu ve maksimum değere %97.87 olarak Polikarbonat (A3) lenslerinin sahip olduğunu gösterdi. En büyük kesme kenarı dalga boyu değeri A3 lensi için 390 nm olarak elde edildi. 550 nm’de soğurma spektrumlarının ise 0.07’nin altında olduğu bulundu. Görme kalitesi açısından görünür ışık geçirgenliğinin yüksek olması, ultraviyole ışık geçirgenliğinin minimum olması beklenir. Gözlerimiz neredeyse her gün ultraviyole ışınlarına maruz kalmakta ve bu ışınlar oküler dokularda hasarlara neden olmaktadır. Ultraviyole ışık emilim miktarı ile oluşan hasarların derecesi artmaktadır. İncelenen ultraviyole koruma kaplamalı organik lensler içerisinde A3 lensinin koruyuculuğunun nispeten daha fazla olduğu görüldü. Ayrıca, optik bant aralığı enerjilerinin doğrudan ve dolaylı geçişler için sırasıyla 3.145-4.155 eV ve 2.994-3.936 eV aralıklarında değiştiği bulunmuştur. En yüksek optik bant aralığı değerlerine sırasıyla B1 ve C1 organik lenslerinin sahip olduğu görüldü.

Anahtar Kelimeler:

CR-39 lens, Göz sağlığı, Polikarbonat lens, UV radyasyon

INVESTIGATION OF SPECTRAL AND OPTICAL PROPERTIES OF SOME ORGANIC EYEGLASS LENSES

In this study, the spectral and optical properties of organic spectacle lenses used as visual aids were analyzed using Jasco V-730 UV/VIS spectrophotometer device in the ultraviolet and visible light wavelength ranges. The results obtained showed that the light transmittance in the wavelength (550nm) range to which the human eye is most sensitive in the lens samples examined was over 80% and that Polycarbonate (A3) lenses had a maximum value of 97.87%. The largest cut-off edge wavelength value was found to be 390nm for the A3 lens. At 550 nm for all lenses, the absorption spectrum was below 0.07. In terms of visual quality, it is expected that the visible light transmittance is high and the ultraviolet light transmission is minimal. Our eyes are exposed to ultraviolet rays almost every day, and these rays cause damage to the ocular tissues. The degree of damage caused by the amount of ultraviolet light absorption increases. Among the organic lenses with ultraviolet protection coating, the protection of the A3 lens was relatively higher. Furthermore, optical band gap energies were found to range from 3.145 – 4.155 eV and 2.994 – 3.936 eV for direct and indirect transitions, respectively. The highest optical band gap values were found to be those of the B1 and C1 organic lenses, respectively.

Keywords:

: CR-39 lens, Eye health, Polycarbonate lens, UV radiation,

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