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

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 o...

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Veröffentlicht in:	Optics letters 2007-08, Vol.32 (16), p.2375-2377
Hauptverfasser:	LINBO LIU, CHENG LIU, WONG CHEE HOWE, SHEPPARD, C. J. R, NANGUANG CHEN
Format:	Artikel
Sprache:	eng
Schlagworte:	Biological and medical sciences Exact sciences and technology Filters, zone plates, and polarizers Fundamental and applied biological sciences. Psychology Fundamental areas of phenomenology (including applications) General aspects, investigation technics, apparatus Image reconstruction tomography Imaging and optical processing Optical elements, devices, and systems Optics Physics Tissues, organs and organisms biophysics
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Beschreibung
Zusammenfassung:	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.
ISSN:	0146-9592 1539-4794
DOI:	10.1364/OL.32.002375