Ultralong-range phase imaging with orthogonal dispersive spectral-domain optical coherence tomography

Autor:	Ding Zhihua, Weidong Shen, Shengtao Mei, Hang Yu, Yan Yangzhi, Hong Wei, Wang Chuan
Rok vydání:	2012
Předmět:	Materials science medicine.diagnostic_test Spectrometer business.industry Phased array Grating Atomic and Molecular Physics and Optics Optics Optical coherence tomography Dispersion (optics) medicine Spectral resolution business Spectroscopy Diffraction grating
Zdroj:	Optics Letters. 37:4555
ISSN:	1539-4794 0146-9592
DOI:	10.1364/ol.37.004555
Popis:	An orthogonal dispersive spectral-domain optical coherence tomography (SDOCT) system based on a spectrometer consisting of a high spectral resolution virtually-imaged phased array (VIPA) and a low resolution diffraction grating is developed. Two-dimensional (2D) dispersion generated by the combination of the VIPA and the grating in conjunction with a 2D CCD leads to an improved performance of the spectrometer. Ultrahigh spectral resolution of 0.002 nm within a free spectrum range of 50 nm is realized, providing the spectrometer with a spectral sampling rate up to ~10(5). The developed SDOCT realizes an imaging depth over 80 mm, which is the longest depth range ever achieved by SDOCT. The increased spectral sampling rate also results in a high signal-to-noise ratio of the SDOCT system. The application of the developed system is further illustrated by quantitative phase imaging of a glass plate and an optical lens.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4281d067c17ca6a1bd77f4ac6522020 https://doi.org/10.1364/ol.37.004555 Zobrazit plný text záznamu