| dc.description.abstract | In this thesis, a dual-reflector design method in optical system of the UV-LED parallel exposure device is the main study. First, setting up a program by calculate the ray tracing to design a collimation secondary optics-inner and outer reflector, and using commercial optical tracing software to validate and advanced design. Second, finding the elementary result by using the program of lamp configuration, also use the optical tracing software to analysis and adjustment. Final, to add up an outer-reflector can promote the useful efficiency and illumination uniformity in optical system.
In this research, the axisymmetric dual-reflector is design to use the geometry relationship with central-ray and edge-ray in optical system, and follow the optical reflection formula to build up the profile which have a symmetry divergence angle and collimated light. The design result will analysis by merit function, gauss function is set for the weighting function in this design method. From all the results, picking up a lamp with 45.08mm height, full width at half maximum (FWHM) of divergence angle is 8.0° and lamp useful efficiency is 58.38%.
The optical system is made by 85 UV-LED light sources and outer-reflector, when the light source is honeycomb arrangement and the spacing 84mm, adding an inner flap outer-reflector can reach high illumination uniformity of 91.16%, exposure area 600×600 mm^2, FWHM of divergence angle is 7.9° and the average irradiance 45.9mW/cm^2. According to the result of simulation, this study had success to design the optical system of UV-LED parallel exposure device. | en_US |