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Opt Lett. 2007 Aug 15;32(16):2375-7.

Binary-phase spatial filter for real-time swept-source optical coherence microscopy.

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


We report a novel scheme to optimize the focusing condition for real-time, swept-source optical coherence microscopy. The axial and lateral behaviors of four-zone binary-phase spatial filters are presented numerically. A nearly constant axial intensity distribution along an extended depth of focus of 1.5 mm and a lateral resolution of 5 microm are experimentally verified. The A-line scan rate is up to 16 kHz, yielding a frame rate of 25 Hz and 640 lines per image.

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