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자료유형
학술저널
저자정보
저널정보
한국광학회 Current Optics and Photonics Journal of the Optical Society of Korea Vol.20 No.1
발행연도
2016.2
수록면
78 - 87 (10page)

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Red blood cells (RBCs) are customarily adhered to a bio-functionalised substrate to make them stationaryin interferometric phase-imaging modalities. This can make them susceptible to receive alterations in innatemorphology due to their own weight. Optical tweezers (OTs) often driven by Gaussian profile of a laserbeam is an alternative modality to overcome contact-induced perturbation but at the same time a steeplyfocused laser beam might cause photo-damage. In order to address both the photo-damage and substrateadherence induced perturbations, we were motivated to stabilize the RBC in OTs by utilizing a laser beamof ‘arbitrary intensity profile’ generated by a source having cavity imperfections per se. Thus the immobilizedRBC was investigated for phase-imaging with sinusoidal interferograms generated by a compact and robustMichelson interferometer which was designed from a cubic beam splitter having one surface coated withreflective material and another adjacent coplanar surface aligned against a mirror. Reflected interferogramsfrom bilayers membrane of a trapped RBC were recorded and analyzed. Our phase-imaging set-up is limitedto work in reflection configuration only because of the availability of an upright microscope. Due to RBC’smembrane being poorly reflective for visible wavelengths, quantitative information in the signal is weakand therefore, the quality of experimental results is limited in comparison to results obtained in transmissionmode by various holographic techniques reported elsewhere.

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