Use of Finite Light Sources to Develop Continuous-Phase Visual Optics

Author

Jyun-Jie Sie ; Yu-Ju Liu ; Chih-Tsung Chang ; En-Hung Lin ; Po-Lei Lee ; Kuo-Kai Shyu

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan

Volume

4

Issue

6

fYear

2012

Firstpage

2326

Lastpage

2332

Abstract

Visual optics for brain-computer interfaces (BCIs) has undergone several developments. Currently, visual optics only provides multiple single-light sources, which limit its applications. This study uses several single-light sources to achieve continuous-phase visual optics. This is combined with a liquid-crystal display (LCD) panel to develop an interactive instrument. Although light synthesis is a nonlinear process, the nonlinear problem is solved by increasing the number of light sources. The measurement data confirm that the phase is approximately linear. This interactive instrument is useful in the biomedical engineering field because it predicts user gaze location.

Keywords

biomedical engineering; biomedical optical imaging; brain-computer interfaces; light sources; liquid crystal displays; optical engineering computing; visual evoked potentials; BCI; LCD; biomedical engineering; brain-computer interfaces; continuous-phase visual optics; finite light sources; interactive instrument; light synthesis; liquid-crystal display; user gaze location; visual evoked potential; Biomedical engineering; Brain computer interfaces; Light emitting diodes; Light sources; Liquid crystal displays; Visual optics; biomedical engineering; brain–computer interface (BCI); continuous phase;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2012.2232650

Filename

6387665