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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 3 — Feb. 29, 2012

Quantitative surface normal measurement by a wavefront camera

Jian Ren, Xiquan Cui, Lap Man Lee, and Changhuei Yang  »View Author Affiliations

Optics Letters, Vol. 37, Issue 2, pp. 199-201 (2012)

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A compact wavefront camera that allows users to quantitatively measure the intensity and wavefront at a remote object plane is reported. The camera is built from a chip-scale wavefront sensor that we previously developed. By measuring the wavefront of the image and calibrating the wavefront relationship between the image and object planes, the wavefront at the object plane can be computed and the surface normal of the object can be derived. We built a prototype camera and calibrated the wavefront relationship. In a proof-of-concept experiment, a set of concave mirrors with different focal lengths (50–200 mm), were imaged. The results agree well with their expected values. To demonstrate the application of the camera, we applied this method to measure the deformation of a microfluidic channel under pressure.

© 2012 Optical Society of America

OCIS Codes
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(110.5200) Imaging systems : Photography
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(150.6044) Machine vision : Smart cameras

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: October 6, 2011
Revised Manuscript: November 21, 2011
Manuscript Accepted: November 22, 2011
Published: January 12, 2012

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Jian Ren, Xiquan Cui, Lap Man Lee, and Changhuei Yang, "Quantitative surface normal measurement by a wavefront camera," Opt. Lett. 37, 199-201 (2012)

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