ABSTRACT
Polyvinyl alcohol (PVA)-based thin films have wide range of technological applications like lithography, sensors, organic light-emitting diodes, coatings, and electrochemical cells. PVA-based thin films exhibit good optical properties and mechanical strength and are light in weight and relatively low cost in manufacture. The optical properties of thin films can be changed as per the specific requirement with the addition of suitable dopant materials and organic dyes. In this work, the green laser beam-blocking property and ultraviolet (UV)-blocking property of PVA-based erythrosine films were studied. The transmission spectrum shows a 0% transmission for a band of 50 nm (500-550 nm); hence, it can block green laser, and in the UV range also, the film exhibits 0% transmittance, so it can act as a UV protective film. Because of the narrow band rejection in its transmission spectrum, it will not degrade the color recognition. The pass band centered at 400 nm can be utilized for band pass applications of optical filters.
