A study on light transmittance through red protective shields modified with different window films

Area of Science:

• Optics and photonics
• Materials science
• Ophthalmology

Background:

• Red protective shields are used to filter light.
• Enhancing their effectiveness in blocking specific wavelengths is crucial for eye protection.

Purpose of the Study:

• To improve the light filtering effectiveness of red protective shields.
• To evaluate the impact of different window films on light transmittance.

Main Methods:

• Red protective shields were modified with V-Kool (VK), Scotchtint (ST), or Hüper Optik (HP) window films.
• Light transmittance (%T) was measured across UV, visible, and infrared spectrums (190-990 nm) using spectrophotometry.

Main Results:

• All modified shields showed <2.5% transmittance in UV and visible light ranges.
• Modified shields demonstrated superior light filtration effectiveness compared to the control, especially at 630 nm.
• In the infrared spectrum (700-990 nm), modified shields achieved 2-38% transmittance, significantly lower than the control (86-91%).
• V-Kool (VK) on both sides was the most effective, followed by VK and Hüper Optik (HP) combination.

Conclusions:

• Window films offer an economical and effective method to enhance red protective shields.
• Modified shields significantly improve infrared light filtration, providing better ocular protection for dental personnel.