Title :
Characterization of Image Receivers for Optical Wireless Location Technology
Author :
Arafa, Ahmed ; Xian Jin ; Bergen, Mark H. ; Klukas, Richard ; Holzman, Jonathan F.
Author_Institution :
Sch. of Eng., Univ. of British Columbia, Kelowna, BC, Canada
Abstract :
In this letter, image receivers are characterized to address the challenges of indoor positioning with optical wireless location systems. Image receivers are studied according to their field-of-view (FOV) characteristics: 1) the first image receiver uses a wide-FOV (95°) microlens and 2) the second image receiver uses an ultrawide-FOV (130°) microlens. An angle of arrival characterization of the image receiver is used to quantify azimuthal, φ, and polar, θ, angles of incident light from optical beacons. A dilution of position (DOP) characterization is used to quantify geometrical effects of the optical beacon distribution. It is found that the ultrawide-FOV microlens (with a mean positioning error of 1.5 cm) can better image widely separated optical beacons, and thus operate at a lower DOP, compared with the wide-FOV microlens (with a mean positioning error of 3.2 cm).
Keywords :
image sensors; microlenses; optical receivers; DOP; dilution of position; field-of-view characteristics; image receivers; incident light angle; indoor positioning; mean positioning error; optical beacons; optical wireless location technology; ultrawide-FOV microlens; wide-FOV microlens; Adaptive optics; Lenses; Microoptics; Optical imaging; Optical receivers; Optical sensors; Angle of arrival (AOA); image sensor; indoor optical positioning;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2446892
