An imaging homogenizer for DLP-based 3D printer

Mayar Magdy; Alaa Fathy; Hussein Kotb; Ahmed Samir; Diaa Khalil

doi:10.1117/12.3005186

12 March 2024 An imaging homogenizer for DLP-based 3D printer

Mayar Magdy, Alaa Fathy, Hussein Kotb, Ahmed Samir, Diaa Khalil

Proceedings Volume 12899, MOEMS and Miniaturized Systems XXIII; 128990Q (2024) https://doi.org/10.1117/12.3005186
Event: SPIE OPTO, 2024, San Francisco, California, United States

Conference Poster

Abstract

A compact imaging Köhler homogenizer with adjustable flattop size was implemented for a DLP engine. It is composed of pulsed UV LED, collimator aspheric lens, double-sided micro-lens array (MLA) with 34×15 micro-lenses and 0.8mmx1.76mm pitch size, and condenser lens. The homogenizer is dedicated for DMD chip of size 1920×1080 pixels (4K resolution) for 3D printer application. The produced flattop at the DMD has 98% measured uniformity and 85% optical efficiency. The calculated Fresnel number was greater than 60, indicating that our MLA has low diffraction effects. A low-cost RTIR prism was proposed using a wedge and a right-angle prism. Compared to conventional RTIR, the structure characterized by low cost and simplicity in assembly.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mayar Magdy, Alaa Fathy, Hussein Kotb, Ahmed Samir, and Diaa Khalil "An imaging homogenizer for DLP-based 3D printer", Proc. SPIE 12899, MOEMS and Miniaturized Systems XXIII, 128990Q (12 March 2024); https://doi.org/10.1117/12.3005186

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