Research Papers: Imaging

Optimized off-axis cylindrical mirror-focused line-scanning system for optical coherence tomography imaging applications

[+] Author Affiliations
Mohammad Kamal, Sivakumar Narayanswamy, Muthukumaran Packirisamy

Concordia University, Department of Mechanical Engineering, 1455 De Maisonneuve Boulevard West, Montreal, Quebec, H3G1M8 Canada

J. Biomed. Opt. 17(5), 056006 (May 04, 2012). doi:10.1117/1.JBO.17.5.056006
History: Received July 14, 2011; Revised February 29, 2012; Accepted March 7, 2012
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Abstract.  The parameters of an off-axis cylindrical mirror-focused line-scanning system were studied to optimize the flatness of the 2 mm scan field. The scanning system parameters included the beam size, the distance between the scanning and the focusing mirror, the angle between the incident beam and the reflected beam, the optical scan angle, and the effective focal length of the cylindrical mirror. Because of the off-axis line-scanning system configuration, the scanning could be carried out either in the tangential (Y-scan) or in the sagittal (X-scan) plane. A 53 nm spectral bandwidth light source was used to evaluate the imaging performance of the scanning system. Since reflective optics is employed in this work for focusing, the scanning system could be used with a higher spectral bandwidth light source for optical coherence tomography applications. The effect of the angle between of the incident and reflected beams, the distance between the mirrors, the focal length of the cylindrical mirror and the scanning directions, on the flatness of the scan field were studied. It was proved that the sagittal scanning is least sensitive to variations in scanning system parameters and thus provides maximum flexibility in design.

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Topics

Mirrors ; Scanning

Citation

Mohammad Kamal ; Sivakumar Narayanswamy and Muthukumaran Packirisamy
"Optimized off-axis cylindrical mirror-focused line-scanning system for optical coherence tomography imaging applications", J. Biomed. Opt. 17(5), 056006 (May 04, 2012). ; http://dx.doi.org/10.1117/1.JBO.17.5.056006


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