標題: Designing an anamorphic illumination system with an RTIR prism for a tilt-and-roll-pixel-type projector
作者: Chen, Yu-Jia
Pan, Jui-wen
光電系統研究所
Institute of Photonic System
公開日期: 20-Apr-2020
摘要: A relay lens system design for a mini-projector with telecentric illumination is described. The reverse total internal reflection (RTIR) prism for angular magnification and lateral magnification is discussed in detail, and magnifications under different digital micromirror devices (DMD) are compared. The tilt-and-roll pixel (TRP) DMD chip (tilt angle is +/- 17 degrees) is the latest spatial light modulator, and the f-number of the illumination system is 1.71. Using the TRP DMD, the lateral magnification and the angular magnification for the RTIR prism can be increased by 3.77% and 8.73% over that obtainable using the conventional DMD chip (tilt angle is +/- 12 degrees). In order to solve for the angular magnification of an RTIR prism, the baffle is set at the aperture stop of the relay lens system. There is a trade-off between the efficiency and the contrast ratio with the baffle. When B (the position of the baffle) is at 0.11, the contrast ratio of the illumination system is 7590:1 and the efficiency is 57%. The spot size at the edge and corner of the DMD active area is controlled to be less than 250 mu m, and the optical distortion is less than 1%. (C) 2020 Optical Society of America
URI: http://dx.doi.org/10.1364/AO.390072
http://hdl.handle.net/11536/154418
ISSN: 1559-128X
DOI: 10.1364/AO.390072
期刊: APPLIED OPTICS
Volume: 59
Issue: 12
起始頁: 3530
結束頁: 3537
Appears in Collections:Articles