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Updated: Aug 9, 2026

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
Published on: May 18, 2011
Long-working-distance microscopic imaging in a turbid medium by use of an ultrafast optical Kerr gate
Yuhu Ren1, Wenjiang Tan1, Yipeng Zheng1
1Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Collaborative Innovation Center of Suzhou Nano Science and Technology, School of Electronics & Information Engineering, Xi'an Jiaotong University, Xianning-xilu 28, Xi'an 710049, China.
Abstract:
We demonstrate a long-working-distance microscopic imaging of hidden objects in a turbid medium by use of an ultrafast optical Kerr gate (OKG). The results show that the working distance and the spatial resolution of the long-working-distance microscopic imaging system have been increased simultaneously compared with those of the conventional 4f OKG imaging systems. A compound lens consisting of a long-focus achromatic doublet and a microscope objective is used to increase the long working distance and ensure the sufficient spatial resolution. The microscopic OKG imaging system with a working distance of 245 mm and a maximal spatial resolution of approximately 7 μm has been performed.
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