Abstract
We present a novel bimodal endoscopic imaging probe that can simultaneously provide full-field white-light video microscopy and confocal optical coherence tomography (OCT) depth scans. The two modalities rely on spectrally separated optical paths that run partially in parallel through a micro-optical bench system, which has a cross-section of only and is realized via standard silicon micromachining techniques. With a numerical aperture of 0.061, the video modality has a resolution and field of view of 9.3 and , respectively. The resolution is limited by the pixel spacing of the coherent fiber bundle, which relays the acquired image from the distal to the proximal end. A custom-designed diffractive optical element placed within the video imaging path significantly improves the image contrast by up to 45% in the medium frequency range. The OCT modality is optimized for 830 nm center wavelength, and works in a confocal arrangement with an NA of 0.018. It provides single-point depth probing at the center of the video image with a lateral resolution of 20 μm. Through its compact footprint and enhanced functionality, the probe can provide depth-resolved guiding capability for existing laparoscopes and represents a major step toward a new class of multimodal endoscopic imaging probes.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Lei Xi, Can Duan, Huikai Xie, and Huabei Jiang
Appl. Opt. 52(9) 1928-1931 (2013)
Donglin Wang, Can Duan, Xiaoyang Zhang, Zhao Yun, Antonio Pozzi, and Huikai Xie
Appl. Opt. 55(25) 6930-6935 (2016)
Can Duan, Quentin Tanguy, Antonio Pozzi, and Huikai Xie
Biomed. Opt. Express 7(9) 3345-3354 (2016)