Dong-Hoon Kim
The Journal of Mechanical Science and Technology, vol. 22, no. 6, pp.1149-1153, 2008

Abstract : This research is focused on the development of a window protection system to prevent pollution of a glass, mirror, or camera lens. For this, a new method for efficient pollution prevention was designed and the characteristic evaluation for developing the system was partly performed. Formerly, the method of using an air purge was generally used for preventing pollution of a camera window. However, the conventional method often induces contaminations due to back flow of air purging. These pollutants can do crucial damage to the camera window and peripheral materials especially in clean room condition. And the conventional method always requires an air supply; therefore, it is difficult to apply the method where an air source cannot be supplied such as a traveling crane located at mountain altitudes. Moreover, the frequent air purging operation or maintenance- personnel intervention causes window surface damage. To solve the above-mentioned problem, an efficient concept for preventing such pollution is proposed in this research. Without air purging, we proposed a new method using repulsion induced by electrifying dirt or moisture to positive magnetic force with high-voltage charge and then injecting gas to the ITO (Indium Tin Oxide) coated window for generating positive ion. In support of the superiority of the designed method for pollution prevention of a window, key factors for permeability and photographing test were defined and partly evaluated as compared with the conventional method. To sum up, in this research, we aim to develop an efficient pollution preventing system for a camera window based on a new method through characteristic evaluation and stabilization of the designed system.

Keyword : Protecting system; Pollution; Camera lens; Air purging; Voltage charge