Dual-mode photosensitive arrays based on integration of liquid crystal microlenses and CMOS sensors for obtaining intensity images and wavefronts

Qing Tong; Yu Lei; Xinyu Zhang; Changsheng Xie

doi:10.1117/12.2187360

4 September 2015 Dual-mode photosensitive arrays based on integration of liquid crystal microlenses and CMOS sensors for obtaining intensity images and wavefronts

Qing Tong, Yu Lei, Xinyu Zhang, Changsheng Xie

Author Affiliations +

Proceedings Volume 9617, Unconventional Imaging and Wavefront Sensing 2015; 96170P (2015) https://doi.org/10.1117/12.2187360
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

As we all know, because the index of refraction of the conventional microlens array (MLA) is not variable, the wavefront sensor based on the conventional MLA can only obtain the intensity image with low-resolution when it is used to measure the wavefront information simultaneously. In this paper, we use the dual-mode photosensitive arrays based on the liquid crystal (LC) MLA and CMOS sensors to obtain both intensity images with high-resolution and wavefronts. The dual-mode photosensitive arrays can work between an imaging mode and a wavefront sensor mode by switching the voltage off and on. In the experiment, we compare the composite wavefront of the object exposured in a white light with the wavefronts of the same object in tricolor laser. Because using the monochromatic light to measure the wavefront of an object may loss some information, it is a better method to use the white light for obtaining the wavefront information of the single object in the black background. We also discussed how to mix the wavefronts of the red green and blue laser to make the mixed wavefront which is closer to the composite wavefront.

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Qing Tong, Yu Lei, Xinyu Zhang, and Changsheng Xie "Dual-mode photosensitive arrays based on integration of liquid crystal microlenses and CMOS sensors for obtaining intensity images and wavefronts", Proc. SPIE 9617, Unconventional Imaging and Wavefront Sensing 2015, 96170P (4 September 2015); https://doi.org/10.1117/12.2187360

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KEYWORDS

Wavefronts

Liquid crystals

Wavefront sensors

CMOS sensors

Sensors

Composites

Microlens array

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