Double-reflection polygon mirror for high-speed optical coherence microscopy.
We report on a high-speed, high-efficiency, high-duty-cycle, path-length-maintaining and linear beam scanner suitable for en face scanning optical coherence microscopy. Fast transverse beam scanning is achieved by use of a double-reflection polygon mirror (DRPM) rotating at a constant speed. With a motor speed of 18,000 rpm and a scanner diameter of 50 mm, the DRPM provides a line rate up to 3 kHz, +/-1.8 degrees scanning range, and 90% duty cycle. A much higher scanning speed and much larger scanning range can be readily achieved by increasing the scanner diameter.
Liu
Linbo
L
Graduate Programme in Bioengineering, National University of Singapore 117576, Singapore.
Chen
Nanguang
N
Sheppard
C J R
CJ
D004867:Equipment Design; D008422:Materials Testing; D008853:Microscopy / Q000295:instrumentation* / Q000379:methods; D015233:Models, Statistical; D008962:Models, Theoretical; D016011:Normal Distribution; D055095:Optics and Photonics; D012542:Scattering, Radiation; D013997:Time Factors; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods