7 March 2016 LC-lens array with light field algorithm for 3D biomedical applications
Author Affiliations +
Proceedings Volume 9769, Emerging Liquid Crystal Technologies XI; 97690F (2016) https://doi.org/10.1117/12.2217513
Event: SPIE OPTO, 2016, San Francisco, California, United States
In this paper, liquid crystal lens (LC-lens) array was utilized in 3D bio-medical applications including 3D endoscope and light field microscope. Comparing with conventional plastic lens array, which was usually placed in 3D endoscope or light field microscope system to record image disparity, our LC-lens array has higher flexibility of electrically changing its focal length. By using LC-lens array, the working distance and image quality of 3D endoscope and microscope could be enhanced. Furthermore, the 2D/3D switching ability could be achieved if we turn off/on the electrical power on LClens array. In 3D endoscope case, a hexagonal micro LC-lens array with 350um diameter was placed at the front end of a 1mm diameter endoscope. With applying electric field on LC-lens array, the 3D specimen would be recorded as from seven micro-cameras with different disparity. We could calculate 3D construction of specimen with those micro images. In the other hand, if we turn off the electric field on LC-lens array, the conventional high resolution 2D endoscope image would be recorded. In light field microscope case, the LC-lens array was placed in front of the CMOS sensor. The main purpose of LC-lens array is to extend the refocusing distance of light field microscope, which is usually very narrow in focused light field microscope system, by montaging many light field images sequentially focusing on different depth. With adjusting focal length of LC-lens array from 2.4mm to 2.9mm, the refocusing distance was extended from 1mm to 11.3mm. Moreover, we could use a LC wedge to electrically shift the optics axis and increase the resolution of light field.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yi-Pai Huang, Yi-Pai Huang, Po-Yuan Hsieh, Po-Yuan Hsieh, Amir Hassanfiroozi, Amir Hassanfiroozi, Manuel Martinez, Manuel Martinez, Bahram Javidi, Bahram Javidi, Chao-Yu Chu, Chao-Yu Chu, Yun Hsuan, Yun Hsuan, Wen-Chun Chu, Wen-Chun Chu, } "LC-lens array with light field algorithm for 3D biomedical applications", Proc. SPIE 9769, Emerging Liquid Crystal Technologies XI, 97690F (7 March 2016); doi: 10.1117/12.2217513; https://doi.org/10.1117/12.2217513


Liquid crystal lens array for 3D endoscope application
Proceedings of SPIE (June 05 2014)
Challenge of 3D LCD displays
Proceedings of SPIE (April 30 2009)
3D and 2D switchable display
Proceedings of SPIE (February 18 2009)

Back to Top