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	Lensless computational imaging technology using deep convolutional network 期刊论文 OAI收割 Sensors (Switzerland), 2020, 卷号: 20, 期号: 9 作者: Chen, Peidong; Su, Xiuqin; Liu, Muyuan; Zhu, Wenhua \| 收藏 \| 浏览/下载：45/0 \| 提交时间：2020/05/28 lensless lens-free computational imaging deep learning FCN (Fully Convolutional Networks) U-Net Dense-U-Net image reconstruction
	The optical design of cubic phase plate testing system (EI CONFERENCE) 会议论文 OAI收割 2011 Symposium on Photonics and Optoelectronics, SOPO 2011, May 16, 2011 - May 18, 2011, Wuhan, China 作者: Zhang X.; Zhang X.; Zhang X.; Zhang Y. 收藏 \| 浏览/下载：19/0 \| 提交时间：2013/03/25 Computer-generated holograms (CGH) have been widely used for years in optical testing of aspheric surfaces in combination with Fizeau interferometers. With the development of diffraction optics computer technology and micro-processing technology the accuracy of the CGH testing can achieve a hundredth of a wave and the cost is reduced greatly. CGH is capable of producing an optical wavefront with any desired shape. So it is fascinating and will have good prospects to test free-form surfaces using CGH. As the CGH can create any wavefront shape it can also be used in unsymmetrical aspherical surfaces testing. Taking the cubic surface as an example this paper gives a method to test unsymmetrical surfaces. This paper gives the design to test a cubic surface. And the separation of the diffraction orders and the binary process of the continuous CGH phase function are discussed in detail. The alignment tolerance of the test system and the CGH fabrication tolerance are analyzed. We also present an idea using a CGH and two spherical lenses as null lens to test the cubic surface when the surface deviation is great. 2011 IEEE.
	Study on optical parts of MOEMS optical switch with low insertion loss (EI CONFERENCE) 会议论文 OAI收割 MEMS/MOEMS Technologies and Applications II, November 10, 2004 - November 12, 2004, Beijing, China 作者: Wang W.; Wang L.; Wang L.; Wang L.; Chen W. 收藏 \| 浏览/下载：31/0 \| 提交时间：2013/03/25 We study insertion losses of optical switch when the laser beam is propagating during the free space between two single mode fibers (SMFs) and the related assemblage challenges Then a new packaging structure is developed for the hybrid-integration of free-space MOEMS (micro-opto-electro-mechanical systems) chip with a silicon micromachined submount to improve alignment accuracy. The submount is designed to accommodate various free-space MOEMS chips with minimal active optical alignment thus reducing the packaging cost. The silicon submount has a central recess to place the MOEMS chip in sixteen V-grooves for optical fibers and micropits for micro ball lenses all bulk micromachined at the same time by a single anisotropic wet etching step. A corner compensation technique is employed to prevent erosion of the convex corners where different geometries meet. Through this assembling method the fiber micro ball lens can be aligned preciously thus reduced lateral and angular misalignment between them. Then total insertion losses can be decreased.