Effect of Injection Temperature Condition on Root Mean Square and Peak-to-Valley of F-theta Lens

Abstract

This study is focused on the root mean square and peak-to-valley based on the injection conditions of thef-theta lens, one of the main components of laser printers and laser scanning systems. The f-theta lens of anaspherical plastic lens requires ultra-preaction. Injection molding is typically used for the mass production ofaspherical plastic lenses. In the injection-molding method, the resin in the lens shape is filled with the resinafter melting the plastic pellets at a constant temperature and then cooled. It is necessary to maintain auniform injection molding system to produce high-quality lenses. These injection-molding systems areinfluenced by different factors, such as pressure, speed, temperature, mold, and cooling. It is possible toobtain a lens that exhibits the optical characteristics required to achieve harmony. We investigated the rootmean square and peak-to-valley caused by variations in temperature, a critical parameter in the melting andcooling of plastic resins generated inside and outside the injection mold.