研究目的
To develop a lens for large viewing angle and high uniformity LED using optical grade poly methyl methacrylate (PMMA) material, integrating computer-aided analysis, Taguchi experimental method, and micromoulding technologies.
研究成果
The study successfully developed an LED lens with a luminance uniformity of 87.18% and a viewing angle of 128° using optical grade PMMA material, micromoulding technology, and the Taguchi experimental method. The results showed that mould temperature and melt temperature were the main factors affecting the optical quality. A draft angle was necessary for successful production despite the small size of the lens.
研究不足
The study found that adding a draft angle to the lens design slightly decreased optical qualities but was necessary for successful demoulding. The lens dimensions are relatively small, and the study focused on PMMA material.
1：Experimental Design and Method Selection:
The study used TracePro software for lens design and Moldex 3D software for mould design and mould filling phenomena analysis. Micromoulding technology and Taguchi experimental method were employed with control parameters including mould temperature (MoT), melt temperature (MT), and injection speed.
2：Sample Selection and Data Sources:
Optical grade PMMA (GH-10008_1 KURARAY) was selected as the lens material. The lens design was based on a previous study with modifications to include a draft angle for mould removal.
3：List of Experimental Equipment and Materials:
Battenfeld Microsystem 50 micromoulding machine, PMMA GH-10008_1 from KURARAY, and optical analysis software TracePro and Moldex3D.
4：3D.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The study involved designing the lens with a draft angle, simulating the mould filling process, conducting Taguchi experiments to optimize moulding parameters, and measuring the optical properties of the moulded lenses.
5：Data Analysis Methods:
The Taguchi method was used to analyze the effects of processing factors on lens moulding qualities. Optical properties were measured using a Goniophotometer (type HLED-Gonio 8).
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