;This paper aims to establish a model that can quickly simulate a rotary UV-LED parallel exposure machines, using the relative motion between the light source and the target plane to achieve the average effect, and applying the degradation model to each light source, comparing before and after Finally, design exposure machine models under different specifications to improve the degradation problem.
Today′s parallel exposure machines that use UV-LED as the light source mainly form an array of light sources, but the initial radiant flux of each light source is not necessarily the same, and the UV-LED chip and light source components will be assembled. There are various errors such as linear offset, angular offset, etc., which lead to correction after assembly, and the uniformity of the exposure machine needs to be quite high compared to other products. The market generally takes the uniformity≧90% as the target . However, when the exposure machine is used for a long time, the degradation rate of each UV-LED is different, that is, when the light sources are lit at the same time, the radiation flux of each light source may not be the same after a period of time. The degradation problem caused by use.
In this research, white LEDs were used instead of UV-LEDs for follow-up simulations, mainly because UV spectrum is harmful to the human body, and it is more convenient and safe to actually verify if there is a plan in the future. Because the light source used in this research will change over time, it would take a lot of time to use optical tracking software. Therefore, the illuminance distribution of the light source is first fitted with a mathematical function, and then the fitted function is corrected to change its position over time. function to simulate the effect of light source rotation.
The design of the exposure machine model is first analyzed for different areas, divided into rotation center area, non-boundary affected area and rotation boundary area, through the analysis to find out the problems in each area, and give appropriate solutions, so that later more efficient design.
Because exposure machines are non-consumer products, most of them are customized products according to different needs, so there is not only a single specification in design, so this research uses three different light source spacings under different conditions, using the aforementioned for different Based on the analysis results of the area, design exposure machine models of different specifications as a reference, and add the established degradation model, analyze the exposure machine models of different specifications, the improvement effect on the light degradation, and the subsequent correction method for the degradation.