Abstract

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 $1.5\mathrm{mm}$ and a lateral resolution of $5\mathrm{\mu }\text{m}$ are experimentally verified. The A-line scan rate is up to $16\mathrm{kHz}$, yielding a frame rate of $25\mathrm{Hz}$ and 640 lines per image.

© 2007 Optical Society of America

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