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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 4 — Apr. 1, 2009

Correction of aberration in holographic optical tweezers using a Shack–Hartmann sensor

Carol López-Quesada, Jordi Andilla, and Estela Martín-Badosa  »View Author Affiliations


Applied Optics, Vol. 48, Issue 6, pp. 1084-1090 (2009)
http://dx.doi.org/10.1364/AO.48.001084


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Abstract

Optical aberration due to the nonflatness of spatial light modulators used in holographic optical tweezers significantly deteriorates the quality of the trap and may easily prevent stable trapping of particles. We use a Shack–Hartmann sensor to measure the distorted wavefront at the modulator plane; the conjugate of this wavefront is then added to the holograms written into the display to counteract its own curvature and thus compensate the optical aberration of the system. For a Holoeye LC-R 2500 reflective device, flatness is improved from 0.8 λ to λ / 16 ( λ = 532 nm ), leading to a diffraction-limited spot at the focal plane of the microscope objective, which makes stable trapping possible. This process could be fully automated in a closed-loop configuration and would eventually allow other sources of aberration in the optical setup to be corrected for.

© 2009 Optical Society of America

OCIS Codes
(090.1000) Holography : Aberration compensation
(230.6120) Optical devices : Spatial light modulators
(090.1995) Holography : Digital holography
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Holography

History
Original Manuscript: September 19, 2008
Revised Manuscript: December 30, 2008
Manuscript Accepted: January 13, 2009
Published: February 13, 2009

Virtual Issues
Vol. 4, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Carol López-Quesada, Jordi Andilla, and Estela Martín-Badosa, "Correction of aberration in holographic optical tweezers using a Shack-Hartmann sensor," Appl. Opt. 48, 1084-1090 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-48-6-1084

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