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Proceedings Paper

The design and fabrication of an optical diffuser for head-up displays
Author(s): Chi-Hung Lee; Ming-Chieh Chou; Yi-Cheng Chen
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Paper Abstract

Laser scanning head-up display (HUD) is an off-axis imaging virtual image display system. Its optical design inherited the feature of head-up display architecture in a fighter. When it is applied to a car, its main optics is replaced by a mirror to save space. Usually, a diffusion sheet or frosted glass is placed in front of a pico-projector to be an image screen, but there will be an issue of lower sharpness of the image due to its low divergence ability for the incident beam. This study proposes a pyramid-shaped micro-structure optical diaphragm to replace the above traditional diffusion films. Besides, the relationship between the optical light path and microstructure in the HUD is also well described.

Paper Details

Date Published: 4 March 2015
PDF: 5 pages
Proc. SPIE 9302, International Conference on Experimental Mechanics 2014, 93023Q (4 March 2015); doi: 10.1117/12.2084680
Show Author Affiliations
Chi-Hung Lee, Feng Chia Univ. (Taiwan)
Ming-Chieh Chou, Industrial Technology Research Institute (Taiwan)
Yi-Cheng Chen, Industrial Technology Research Institute (Taiwan)


Published in SPIE Proceedings Vol. 9302:
International Conference on Experimental Mechanics 2014
Chenggen Quan; Kemao Qian; Anand Asundi; Fook Siong Chau, Editor(s)

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