Light field image sensors based on the Talbot effect
Applied Optics, Vol. 48, Issue 31, pp. 5897-5905 (2009)
http://dx.doi.org/10.1364/AO.48.005897
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Abstract
We present a pixel-scale sensor that uses the Talbot effect to detect the local intensity and incident angle of light. The sensor comprises two local diffraction gratings stacked above a photodiode. When illuminated by a plane wave, the upper grating generates a self-image at the half Talbot depth. The second grating, placed at this depth, blocks or passes light depending upon incident angle. Several such structures, tuned to different incident angles, are sufficient to extract local incident angle and intensity. Furthermore, arrays of such structures are sufficient to localize light sources in three dimensions without any additional optics.
© 2009 Optical Society of America
OCIS Codes
(040.1240) Detectors : Arrays
(050.2770) Diffraction and gratings : Gratings
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(110.7348) Imaging systems : Wavefront encoding
ToC Category:
Remote Sensing and Sensors
History
Original Manuscript: June 4, 2009
Revised Manuscript: September 21, 2009
Manuscript Accepted: September 29, 2009
Published: October 21, 2009
Citation
Albert Wang, Patrick Gill, and Alyosha Molnar, "Light field image sensors based on the Talbot effect," Appl. Opt. 48, 5897-5905 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-31-5897
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