Long working range light field microscope with fast scanning multifocal liquid crystal microlens array

Po Yuan Hsieh, Ping Yen Chou, Hsiu An Lin, Chao Yu Chu, Cheng Ting Huang, Chun Ho Chen, Zong Qin, Manuel Martinez Corral, Bahram Javidi, Yi-Pai Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The light field microscope has the potential of recording the 3D information of biological specimens in real time with a conventional light source. To further extend the depth of field to broaden its applications, in this paper, we proposed a multifocal high-resistance liquid crystal microlens array instead of the fixed microlens array. The developed multifocal liquid crystal microlens array can provide high quality point spread function in multiple focal lengths. By adjusting the focal length of the liquid crystal microlens array sequentially, the total working range of the light field microscope can be much extended. Furthermore, in our proposed system, the intermediate image was placed in the virtual image space of the microlens array, where the condition of the lenslets numerical aperture was considerably smaller. Consequently, a thin-cell-gap liquid crystal microlens array with fast response time can be implemented for time-multiplexed scanning.

Original languageEnglish
Pages (from-to)10981-10996
Number of pages16
JournalOptics Express
Volume26
Issue number8
DOIs
StatePublished - 16 Apr 2018

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