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Journal articles on the topic 'Lens-free imaging'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Tao, Hua, Suhas P. Veetil, Xingchen Pan, Cheng Liu, and Jianqiang Zhu. "Lens-free coherent modulation imaging with collimated illumination." Chinese Optics Letters 14, no. 7 (2016): 071203. http://dx.doi.org/10.3788/col201614.071203.

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2

Kim, Sang Bok, Hojae Bae, Kyo-in Koo, Mehmet R. Dokmeci, Aydogan Ozcan, and Ali Khademhosseini. "Lens-Free Imaging for Biological Applications." Journal of Laboratory Automation 17, no. 1 (2012): 43–49. http://dx.doi.org/10.1177/2211068211426695.

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3

Bao, Rui, Chunhui Cui, Shuda Yu, Huafu Mai, Xiaoda Gong, and Mao Ye. "Polarizer-free imaging of liquid crystal lens." Optics Express 22, no. 16 (2014): 19824. http://dx.doi.org/10.1364/oe.22.019824.

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4

Yazhou Wang, Yazhou Wang, Qionghua Wang Qionghua Wang, Dahai Li Dahai Li, Huan Deng Huan Deng, and Chenggao Luo Chenggao Luo. "Crosstalk-free integral imaging display based on double plano-convex micro-lens array." Chinese Optics Letters 11, no. 6 (2013): 061101–61104. http://dx.doi.org/10.3788/col201311.061101.

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5

Huang, Chih-Yuan, Hung-Shiue Chen, Chih-Yuan Liu, Chin-Han Chen, and D. J. Han. "Lens-free phase shifting imaging for cold atoms." Journal of the Optical Society of America B 31, no. 1 (2013): 87. http://dx.doi.org/10.1364/josab.31.000087.

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6

Zhang Chao, 张超, 邢涛 Xing Tao, 刘紫珍 Liu Zizhen, et al. "Lens-Free Imaging Method Based on Generative Adversarial Networks." Acta Optica Sinica 40, no. 16 (2020): 1611003. http://dx.doi.org/10.3788/aos202040.1611003.

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7

Ge, Zhou, Pei Zhang, Yizhao Gao, Hayden K. H. So, and Edmund Y. Lam. "Lens-free motion analysis via neuromorphic laser speckle imaging." Optics Express 30, no. 2 (2022): 2206. http://dx.doi.org/10.1364/oe.444948.

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8

Stürzl, W., D. Soccol, J. Zeil, N. Boeddeker, and M. V. Srinivasan. "Rugged, obstruction-free, mirror-lens combination for panoramic imaging." Applied Optics 47, no. 32 (2008): 6070. http://dx.doi.org/10.1364/ao.47.006070.

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9

Guo, Jinhong, Xiwei Huang, Dongyuan Shi, et al. "Portable resistive pulse-activated lens-free cell imaging system." RSC Adv. 4, no. 99 (2014): 56342–45. http://dx.doi.org/10.1039/c4ra10481a.

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10

Colle, Frederik, Dries Vercruysse, Sara Peeters, et al. "Lens-free imaging of magnetic particles in DNA assays." Lab on a Chip 13, no. 21 (2013): 4257. http://dx.doi.org/10.1039/c3lc50707f.

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11

Verbist, K., C. Nelson, and K. Krishnan. "User Access to Lorentz Microscopy at the NCEM, LBNL, Berkeley." Microscopy and Microanalysis 4, S2 (1998): 472–73. http://dx.doi.org/10.1017/s1431927600022480.

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A standard Philips CM200FEG electron microscope, without the special Lorentz lens, has been optimized for Lorentz imaging. The necessary field-free sample region is obtained by switching off the objective lens in the free lens mode. The limited range of magnification is compensated for by a post-column Gatan image filter (GIF) which magnifies by a factor of _ 20. Fresnel imaging is performed by defocusing with the diffraction lens. The use of low angle diffraction, in combination with the apertures located at the selected area aperture plane, allow Foucault imaging. The TEM analog of different

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12

Roy, Mohendra, Geonsoo Jin, Jeong-Hoon Pan, et al. "Staining-free cell viability measurement technique using lens-free shadow imaging platform." Sensors and Actuators B: Chemical 224 (March 2016): 577–83. http://dx.doi.org/10.1016/j.snb.2015.10.097.

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13

Gan Dawei, 甘大为, 刘志强 Liu Zhiqiang, 冯文斌 Feng Wenbin та 叶茂 Ye Mao. "液晶透镜的无偏振片成像方法". Acta Optica Sinica 44, № 21 (2024): 2111001. http://dx.doi.org/10.3788/aos241092.

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14

Mathieu, Evelien, Colin D. Paul, Richard Stahl, et al. "Time-lapse lens-free imaging of cell migration in diverse physical microenvironments." Lab on a Chip 16, no. 17 (2016): 3304–16. http://dx.doi.org/10.1039/c6lc00860g.

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15

Zhang, Wanlu, Xinzhu Sang, Xin Gao, et al. "A flipping-free 3D integral imaging display using a twice-imaging lens array." Optics Express 27, no. 22 (2019): 32810. http://dx.doi.org/10.1364/oe.27.032810.

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16

Li, Pan, Guangyong Li, Haibo Yu, Feifei Wang, Lianqing Liu, and Wen Jung Li. "Advances in Dielectric Microspherical Lens Nanoscopy: Label-Free Superresolution Imaging." IEEE Nanotechnology Magazine 15, no. 1 (2021): 38—C3. http://dx.doi.org/10.1109/mnano.2020.3037433.

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17

Cui, Chunhui, Rui Bao, Shuda Yu, and Mao Ye. "Polarizer-free imaging using reference image for liquid crystal lens." Optics Communications 342 (May 2015): 214–17. http://dx.doi.org/10.1016/j.optcom.2014.12.074.

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18

Bao, Rui, Chunhui Cui, Shuda Yu, and Mao Ye. "P-182L:Late-News Poster: Polarizer-Free Liquid Crystal Lens Imaging." SID Symposium Digest of Technical Papers 45, no. 1 (2014): 1465–68. http://dx.doi.org/10.1002/j.2168-0159.2014.tb00388.x.

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19

Cui, Chunhui, Rui Bao, Shuda Yu, Huafu Mai, and Mao Ye. "19.4: Denoising for Polarizer-Free Imaging of Liquid Crystal Lens." SID Symposium Digest of Technical Papers 46, no. 1 (2015): 262–65. http://dx.doi.org/10.1002/sdtp.10459.

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20

Shin, Jaewook, Dung N. Tran, Jasper R. Stroud, Sang Chin, Trac D. Tran, and Mark A. Foster. "A minimally invasive lens-free computational microendoscope." Science Advances 5, no. 12 (2019): eaaw5595. http://dx.doi.org/10.1126/sciadv.aaw5595.

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Ultra-miniaturized microendoscopes are vital for numerous biomedical applications. Such minimally invasive imagers allow for navigation into hard-to-reach regions and observation of deep brain activity in freely moving animals. Conventional solutions use distal microlenses. However, as lenses become smaller and less invasive, they develop greater aberrations and restricted fields of view. In addition, most of the imagers capable of variable focusing require mechanical actuation of the lens, increasing the distal complexity and weight. Here, we demonstrate a distal lens-free approach to microen

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21

Dong, Ke Xiu, Nan Nan Wei, Jian Ping Shi, and Yan Qin Wang. "Compact Compound Imaging System with Large Target Surface." Key Engineering Materials 609-610 (April 2014): 863–66. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.863.

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Compact compound imaging system with large CCD target surface has been researched. The target surface reaches 50mmX50mm, and reduces the system processing and installation difficulty. We present the system overall plan and discuss the imaging characteristics. The imaging results for sector resolution target show that the system can image with multi channel crosstalk free. The results show that whether the single convex lens system or double convex lens system, the definition and contrast of single channel graphs are poor. However we can get the super resolution image by POCS algorithm. The rec

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22

Baik, Minyoung, Sanghoon Shin, Samir Kumar, et al. "Label-Free CD34+ Cell Identification Using Deep Learning and Lens-Free Shadow Imaging Technology." Biosensors 13, no. 12 (2023): 993. http://dx.doi.org/10.3390/bios13120993.

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Accurate and efficient classification and quantification of CD34+ cells are essential for the diagnosis and monitoring of leukemia. Current methods, such as flow cytometry, are complex, time-consuming, and require specialized expertise and equipment. This study proposes a novel approach for the label-free identification of CD34+ cells using a deep learning model and lens-free shadow imaging technology (LSIT). LSIT is a portable and user-friendly technique that eliminates the need for cell staining, enhances accessibility to nonexperts, and reduces the risk of sample degradation. The study invo

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23

Kong, Weijie, Ling Liu, Changtao Wang, et al. "A planar ultraviolet objective lens for optical axis free imaging nanolithography by employing optical negative refraction." Nanoscale Advances 4, no. 8 (2022): 2011–17. http://dx.doi.org/10.1039/d1na00883h.

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24

Bai Yichen, 白一晨, 陈晓西 Chen Xiaoxi, 曾俊 Zeng Jun, and 叶茂 Ye Mao. "An Optimization Algorithm for Polarizer-Free Imaging of Liquid Crystal Lens." Acta Optica Sinica 38, no. 8 (2018): 0815015. http://dx.doi.org/10.3788/aos201838.0815015.

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25

WANG, Hailun, and Yueke WANG. "Lens-free adversarial encoded imaging method based on convolutional attention mechanism." Chinese Journal of Liquid Crystals and Displays 39, no. 9 (2024): 1214–22. http://dx.doi.org/10.37188/cjlcd.2023-0313.

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26

Luo, Zhenxiang, Abdulkadir Yurt, Richard Stahl, et al. "Fast compressive lens-free tomography for 3D biological cell culture imaging." Optics Express 28, no. 18 (2020): 26935. http://dx.doi.org/10.1364/oe.393492.

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27

Mariën, Jasper, Richard Stahl, Andy Lambrechts, Chris van Hoof, and Abdulkadir Yurt. "Color lens-free imaging using multi-wavelength illumination based phase retrieval." Optics Express 28, no. 22 (2020): 33002. http://dx.doi.org/10.1364/oe.402293.

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28

Roy, Mohendra, Dongmin Seo, Sangwoo Oh, Ji-Woon Yang, and Sungkyu Seo. "A review of recent progress in lens-free imaging and sensing." Biosensors and Bioelectronics 88 (February 2017): 130–43. http://dx.doi.org/10.1016/j.bios.2016.07.115.

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29

Weidling, John, Serhan O. Isikman, Alon Greenbaum, Aydogan Ozcan, and Elliot Botvinick. "Lens-free computational imaging of capillary morphogenesis within three-dimensional substrates." Journal of Biomedical Optics 17, no. 12 (2012): 126018. http://dx.doi.org/10.1117/1.jbo.17.12.126018.

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30

Coskun, Ahmet F., Ting-Wei Su, and Aydogan Ozcan. "Wide field-of-view lens-free fluorescent imaging on a chip." Lab on a Chip 10, no. 7 (2010): 824. http://dx.doi.org/10.1039/b926561a.

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31

Allier, C., S. Morel, R. Vincent, et al. "Imaging of dense cell cultures by multiwavelength lens-free video microscopy." Cytometry Part A 91, no. 5 (2017): 433–42. http://dx.doi.org/10.1002/cyto.a.23079.

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32

Xu, Yikai. "Advances in CODE V design in terahertz imaging system." Advances in Engineering Technology Research 6, no. 1 (2023): 533. http://dx.doi.org/10.56028/aetr.6.1.533.2023.

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The band of terahertz (THz) spans from microwave to infrared bands, which belongs to the transition band from macro-electronics to micro-photonics, possessing peculiarities different from electromagnetic waves in other bands. THz technology with the characteristics of high penetration, broadband, high resolution and transient are employed in various fields, such as space remote sensing, nondestructive detection biomedical imaging and near-field microscopy. These broad applications, in turn, provide incentive to further improve the basic performance of THz technology. Aiming at the application

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33

Gao, Guohan, Danbo Mao, Bin Fan, and Chunlin Guan. "Effect of Wet Expansion Behavior on Polyimide Membrane Diffractive Lens." Coatings 9, no. 9 (2019): 559. http://dx.doi.org/10.3390/coatings9090559.

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Optical polyimide (PI) membrane is a potential substrate to fabricate a diffractive primary lens in large aperture space-borne telescope. In this paper, we investigated the wet expansion behavior of PI via a strain gauge method and measured the coefficient of wet expansion (CWE) of PI membrane supported by different fixtures. The CWE of silica-fixed, ring-fixed, and free state PI membrane were near zero, 5 ppm/%, and 10 ppm/% respectively. It is found that Fresnel zone lens (FZL), based on PI membrane with lower CWE, achieve a better imaging quality with smaller wave-front errors. The underlyi

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34

Terry, Joel, Daniel Geddes, Victor Ochoa-Gutierrez, Zhiyuan Yang, Kenneth J. Smith, and Andrew R. Harvey. "Trans-scleral Illumination - The Future of Retinal Imaging?" EPJ Web of Conferences 266 (2022): 02007. http://dx.doi.org/10.1051/epjconf/202226602007.

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We report how illumination of the retina through the sclera enables the recording of high-contrast reflectance and fluorescence images of the retina, free of the cornea and lens glare and autofluoresence that degrades images recorded using traditional illumination through the pupil.

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35

Chen, Xueli, Xinbo Gao, Xiaochao Qu, et al. "Qualitative Simulation of Photon Transport in Free Space Based on Monte Carlo Method and Its Parallel Implementation." International Journal of Biomedical Imaging 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/650298.

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During the past decade, Monte Carlo method has obtained wide applications in optical imaging to simulate photon transport process inside tissues. However, this method has not been effectively extended to the simulation of free-space photon transport at present. In this paper, a uniform framework for noncontact optical imaging is proposed based on Monte Carlo method, which consists of the simulation of photon transport both in tissues and in free space. Specifically, the simplification theory of lens system is utilized to model the camera lens equipped in the optical imaging system, and Monte C

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36

Phillips, Patrick, Nella Chapell, Hideya Ueno, et al. "Advancing Electron Microscopy: The Role of the MARS in Magnetic Field-Free Imaging." Microscopy Today 33, no. 3 (2025): 20–27. https://doi.org/10.1093/mictod/qaaf039.

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Abstract Transmission electron microscopy (TEM) has long been constricted by the need to place samples within high-magnetic fields during imaging, limiting direct atomic-resolution examination of magnetic materials. The JEOL MARS (Magnetic field-free Atomic Resolution imaging System, JEM-Z200MF) represents a revolution in TEM by enabling atomic-resolution imaging in a magnetic field-free environment. By incorporating a new objective lens system that realizes a magnetic field-free environment at the sample position, the MARS enables direct and atomic-level observation of samples without unwante

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37

Li, Yuqian, Bruno Cornelis, Alexandra Dusa, et al. "Accurate label-free 3-part leukocyte recognition with single cell lens-free imaging flow cytometry." Computers in Biology and Medicine 96 (May 2018): 147–56. http://dx.doi.org/10.1016/j.compbiomed.2018.03.008.

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38

Volkov, V. V., and Y. Zhu. "In-Situ Tem Dynamic Magnetizing Experiments Used To Identify The Pinning Centers In Hard Magnets Re13.75fe80.25b6 (Re=Nd, Pr)." Microscopy and Microanalysis 5, S2 (1999): 20–21. http://dx.doi.org/10.1017/s1431927600013428.

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The new JEOL 3000F high resolution electron microscope at BNL has been optimized for Lorentz imaging. The necessary field-free environment around the sample is obtained by switching off the objective lens in the free-lens control mode, and the associated reduction in magnification is compensated for by a Gatan post-column image filter (GIF) at ∼ 20x magnification. Fresnel imaging is obtained by defocusing with objective mini-lens (OM). The use of low angle diffraction with an aperture located at the back focal plane makes it possible to obtain Foucault images.In-situTEM dynamic magnetizing exp

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39

Xu, CY, and HB Cheng. "A free-form side-emitting lens for airfield lighting." Lighting Research & Technology 50, no. 6 (2017): 937–51. http://dx.doi.org/10.1177/1477153517702695.

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Side-emitting lenses are essential devices in some special lighting fields. Two types of side-emitting lenses with refractive and total reflective free-form surfaces are introduced. The principles of geometric optics and non-imaging optics are adopted to construct the free-form surfaces without complex mapping or a differential iteration process. As an example, an elevated taxiway edge light is designed for airfield lighting. A side-emitting lens with two sawtooth additions on top is designed to meet the luminous intensity distribution required by the US Federal Aviation Administration (FAA).

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40

Vaghashiya, Rajkumar, Sanghoon Shin, Varun Chauhan, et al. "Machine Learning Based Lens-Free Shadow Imaging Technique for Field-Portable Cytometry." Biosensors 12, no. 3 (2022): 144. http://dx.doi.org/10.3390/bios12030144.

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The lens-free shadow imaging technique (LSIT) is a well-established technique for the characterization of microparticles and biological cells. Due to its simplicity and cost-effectiveness, various low-cost solutions have been developed, such as automatic analysis of complete blood count (CBC), cell viability, 2D cell morphology, 3D cell tomography, etc. The developed auto characterization algorithm so far for this custom-developed LSIT cytometer was based on the handcrafted features of the cell diffraction patterns from the LSIT cytometer, that were determined from our empirical findings on th

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41

Seo, Dongmin, Euijin Han, Samir Kumar, et al. "Field-Portable Leukocyte Classification Device Based on Lens-Free Shadow Imaging Technique." Biosensors 12, no. 2 (2022): 47. http://dx.doi.org/10.3390/bios12020047.

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The complete blood count (CBC) is one of the most important clinical steps in clinical diagnosis. The instruments used for CBC are usually expensive and bulky and require well-trained operators. Therefore, it is difficult for medical institutions below the tertiary level to provide these instruments, especially in underprivileged countries. Several reported on-chip blood cell tests are still in their infancy and do not deviate from conventional microscopic or impedance measurement methods. In this study, we (i) combined magnetically activated cell sorting and the differential density method to

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42

Roy, Mohendra, Dongmin Seo, Sangwoo Oh, Yeonghun Chae, Myung-Hyun Nam, and Sungkyu Seo. "Automated Micro-Object Detection for Mobile Diagnostics Using Lens-Free Imaging Technology." Diagnostics 6, no. 2 (2016): 17. http://dx.doi.org/10.3390/diagnostics6020017.

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43

Guo, Cheng, Yixuan Zhao, Jiubin Tan, Shutian Liu, and Zhengjun Liu. "Adaptive lens-free computational coherent imaging using autofocusing quantification with speckle illumination." Optics Express 26, no. 11 (2018): 14407. http://dx.doi.org/10.1364/oe.26.014407.

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44

Lee, Junhee, Yeon Hwa Kwak, Se-Hwan Paek, Seungoh Han, and Sungkyu Seo. "CMOS image sensor-based ELISA detector using lens-free shadow imaging platform." Sensors and Actuators B: Chemical 196 (June 2014): 511–17. http://dx.doi.org/10.1016/j.snb.2014.02.059.

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45

Shin, Sanghoon, Sangwoo Oh, Dongmin Seo, et al. "Field-portable seawater toxicity monitoring platform using lens-free shadow imaging technology." Water Research 230 (February 2023): 119585. http://dx.doi.org/10.1016/j.watres.2023.119585.

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46

Reznicek, J. "Method for Measuring Lens Distortion by Using Pinhole Lens." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5 (June 6, 2014): 509–15. http://dx.doi.org/10.5194/isprsarchives-xl-5-509-2014.

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In photogrammetric applications, the measurements are conducted on images given by optical imaging systems (cameras). In order to ensure the demanded accuracy, those cameras have to be well calibrated geometrically. A new method for measuring glass lens distortion based on using distortion-free pinhole lens is proposed, where the measure of the distortion progress is derived by comparing two images of the calibration field, given by pinhole lens and glass lens. Presented approach to measuring the lens distortion provides directly the deviations of corresponding target images given by the pinho

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47

Taghaddos, Elaheh, Mehdi Hejazi, and Ahmad Safari. "Lead-free piezoelectric materials and ultrasonic transducers for medical imaging." Journal of Advanced Dielectrics 05, no. 02 (2015): 1530002. http://dx.doi.org/10.1142/s2010135x15300029.

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Piezoelectric materials have been vastly used in ultrasonic transducers for medical imaging. In this paper, firstly, the most promising lead-free compositions with perovskite structure for medical imaging applications have been reviewed. The electromechanical properties of various lead-free ceramics, composites, and single crystals based on barium titanate, bismuth sodium titanate, potassium sodium niobate, and lithium niobate are presented. Then, fundamental principles and design considerations of ultrasonic transducers are briefly described. Finally, recent developments in lead-free ultrason

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48

Vercruysse, Dries, Alexandra Dusa, Richard Stahl, et al. "Three-part differential of unlabeled leukocytes with a compact lens-free imaging flow cytometer." Lab on a Chip 15, no. 4 (2015): 1123–32. http://dx.doi.org/10.1039/c4lc01131g.

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We assemble a compact lens-free in-line holographic microscope, employ it to image blood cells flowing in a microfluidic chip and perform a three-part leukocyte differential based on the acquired images.

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49

Lei, Jian, Minghui Wang, Jin Wu, et al. "Elliptical Supercritical Lens for Shaping Sub-Diffractive Transverse Optical Needle." Nanomaterials 13, no. 2 (2023): 242. http://dx.doi.org/10.3390/nano13020242.

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Supercritical lens can create a sub-diffraction-limited focal spot in the far field, providing a promising route for the realization of label-free super-resolution imaging through the point scanning mechanism. However, all of the reported supercritical lenses have circular shape configurations, and produce isotropic sub-diffraction-limited focal spots in the focal plane. Here, we propose and experientially demonstrate a sub-diffraction transverse optical needle by using an elliptical supercritical lens. Through breaking the circular symmetry and introducing ellipticity to the lens, a uniform s

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50

Krysztofiak, Katarzyna, Kamila Ciężar, and Mikołaj Kościński. "Raman Imaging of Layered Soft Contact Lenses." Journal of Applied Biomaterials & Functional Materials 15, no. 2 (2017): 149–52. http://dx.doi.org/10.5301/jabfm.5000329.

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Background Daily disposable contact lenses are gaining in popularity among practitioners and wearers for the improved ocular health and subjective outcomes they offer. Recently a novel daily disposable contact lens material with water gradient technology was introduced. Delefilcon A lenses consist of a 33% water content silicone hydrogel core and an outer hydrogel layer which is totally free of silicone and contains 80% water. Methods The aim of the present study was to confirm the layered structure of delefilcon A contact lenses. Thickness of hydrogel coating on the silicone hydrogel core was

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