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Double-reflection polygon mirror for high-speed optical coherence microscopy.

Linbo Liu1, Nanguang Chen, C J R Sheppard

  • 1Graduate Programme in Bioengineering, National University of Singapore 117576, Singapore.

Optics Letters
|December 19, 2007
PubMed
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This study introduces a novel linear beam scanner for optical coherence microscopy. The scanner achieves high speed and efficiency using a double-reflection polygon mirror, enabling rapid en face imaging.

Area of Science:

  • Biomedical Optics
  • Microscopy Technology

Background:

  • En face scanning optical coherence microscopy requires fast and efficient beam scanning.
  • Existing scanners may face limitations in speed, duty cycle, or path-length maintenance.

Purpose of the Study:

  • To develop and characterize a high-speed, high-efficiency linear beam scanner.
  • To enable advanced en face scanning optical coherence microscopy applications.

Main Methods:

  • Utilized a double-reflection polygon mirror (DRPM) rotating at constant speed.
  • Integrated the DRPM into an optical system for en face scanning.
  • Evaluated scanner performance including line rate, scanning range, and duty cycle.

Main Results:

  • Achieved a line rate up to 3 kHz with a 50 mm diameter DRPM at 18,000 rpm.

Related Experiment Videos

  • Demonstrated a +/-1.8 degrees scanning range and a 90% duty cycle.
  • Confirmed path-length maintenance for en face scanning applications.

    • Conclusions:

    • The developed DRPM-based scanner offers high-speed and high-efficiency beam scanning.
    • This technology is suitable for en face scanning optical coherence microscopy.
    • Scalability for higher speeds and ranges is feasible by increasing scanner diameter.