Grayscale projection design method based on micro lens array

Xiaolu Miao; Chunhao Fang; Su Shen

doi:10.1117/12.3010760

1 November 2023 Grayscale projection design method based on micro lens array

Xiaolu Miao, Chunhao Fang, Su Shen

Author Affiliations +

Proceedings Volume 12917, International Conference on Precision Instruments and Optical Engineering (PIOE 2023); 1291713 (2023) https://doi.org/10.1117/12.3010760
Event: 3rd International Conference on Precision Instruments and Optical Engineering (PIOE 2023), 2023, Shanghai, China

Abstract

Due to its thinness and large focal depth range, micro lens array (MLA) based projectors possess high potential in automotive lighting, traffic signs, and short-distance projection. Recently, researchers have paid extensive attention to projectors that employ micro lens arrays as projection lenses and transmissive chromium layers as masks. In order to expand the application scope of such projectors, we have developed a projection device capable of projecting grayscale images. By specially designing the mask pattern for each micro lens, the projected image from each sub-aperture is different, resulting in varying illuminance levels in different parts of the overlaid image on the image plane. This design method enables the projector to project fine grayscale images without requiring high-precision lithography equipment.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xiaolu Miao, Chunhao Fang, and Su Shen "Grayscale projection design method based on micro lens array", Proc. SPIE 12917, International Conference on Precision Instruments and Optical Engineering (PIOE 2023), 1291713 (1 November 2023); https://doi.org/10.1117/12.3010760

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KEYWORDS

Projection systems

Design and modelling

Lens arrays

Image segmentation

Lithography

Light sources and illumination

Ultraviolet radiation

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