title: Long-working-distance microscopic imaging in a turbid medium by use of an ultrafast optical Kerr gate.
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.
authors.affiliation: Key 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.
authors.forename: Yuhu
authors.initials: Y
authors.lastname: Ren
authors.affiliation: Key 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.
authors.forename: Wenjiang
authors.initials: W
authors.lastname: Tan
authors.affiliation: Key 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.
authors.forename: Yipeng
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Key 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.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Liu
authors.affiliation: Departments of Applied Physics, Xi'an University of Technology, Xi'an 710048, China.
authors.forename: Junyi
authors.initials: J
authors.lastname: Tong