In this paper, we consider possibilities to compensate the chromatic aberration effects in the swept source optical coherence tomography system with line-field illumination (LF SSOCT) in spectral range 1260-1360 nm and reflected light acquisition by linear array InGaAs photo detector. Compensation of chromatic aberrations is provided by combined use of optimized optical system design with sharp focusing independent on light wavelength and fringe processing algorithm which allows accurate spectral fringe frequency evaluation even in the case of nonlinearity of the wavenumber tuning. Experimental results confirmed significant enhancement of imaging quality including LF SSOCT mode.
Peculiarities of optical design for optical coherence tomography (OCT) system with illumination by a swept-source in the spectral range 1.26-1.36 μm are considered. In the OCT system, an object is illuminated by light intensity distribution in the form of line providing high power efficiency of the light source when evaluating micro structure of objects. A linearray photo detector with the frame acquisition rate of a few tens of kilohertz is utilized that allows obtaining B-scans without mechanical lateral scanning. The illumination power density at each point of investigated object is much less with respect to conventional "flying spot" methods that is important when studying biological objects not resistant to intensive light. Results of experimental investigations utilizing the Linnik micro interferometer optical scheme are given. Experimental tomograms of different objects are presented.
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