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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Bibliographic Details
Published in:Optics letters 2007-08, Vol.32 (16), p.2375-2377
Main Authors: LINBO LIU, CHENG LIU, WONG CHEE HOWE, SHEPPARD, C. J. R, NANGUANG CHEN
Format: Article
Language:English
Subjects:
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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Summary: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