Results 21 to 30 of about 705,634 (314)

Resolution and Contrast Enhancement for Lensless Digital Holographic Microscopy and Its Application in Biomedicine

Photonics, 2022
An important imaging technique in biomedicine, the conventional optical microscopy relies on relatively complicated and bulky lens and alignment mechanics.
Duofang Chen, Lin Wang, Xixin Luo, Hui Xie, Xueli Chen   +4 more
doaj   +1 more source

Photopolymer-based volume holographic optical elements: design and possible applications [PDF]

Journal of the European Optical Society-Rapid Publications, 2015
In this paper, Volume Holographic Optical Elements (V-HOEs), such as holographic gratings and spherical lenses, are designed and fabricated by using a prototype of photopolymer.
Bianco G., Ferrara M. A., Borbone F., Roviello A., Striano V., Coppola G.   +5 more
doaj   +1 more source

High-Speed Lens-Free Holographic Sensing of Protein Molecules Using Quantitative Agglutination Assays

ACS Sensors, 2021
Accurate, cost-effective, easy-to-use, and point-of-care sensors for protein biomarker levels are important for disease diagnostics. A cost-effective and compact readout approach that has been used for several diagnostic applications is lens-free ...
Zhen Xiong, Colin J. Potter, Euan McLeod
openalex   +3 more sources

High numerical aperture holographic microscopy reconstruction with extended z range [PDF]

, 2015
An holographic microscopy reconstruction method compatible with high numerical aperture microscope objective (MO) up to NA=1.4 is proposed. After off axis and reference field curvature corrections, and after selection of the +1 grating order holographic ...
Donnarumma, Dario, Gross, Michel, Tessier, Gilles, Verrier, Nicolas   +3 more
core   +4 more sources

Ferroelectric Liquid Crystal Compound Lens Based on Pancharatnam–Berry Phase

Crystals, 2022
We report a ferroelectric liquid crystal (FLC) compound lens based on the Pancharatnam–Berry (PB) phase. The phase of the FLC compound lens is an integration of polarization grating and a PB lens. Thus, when light passes through an FLC compound lens, the
Ying Ma, Mingkui Yin, Yuhang Shan, Vladimir G. Chigrinov, Hoi-Sing Kwok, Jianlin Zhao   +5 more
doaj   +1 more source

Study on the adaptability of augmented reality smartglasses for astigmatism based on holographic waveguide grating

Virtual Reality & Intelligent Hardware, 2020
Background: Augmented reality (AR) smartglasses are considered as the next generation of smart devices to replace mobile phones, and are widely concerned. But at present, AR smartglasses are usually designed according to the human normal eyes.
Shenze Wang, Kaikai Du, Ningfang Song, Dongfeng Zhao, Di Feng, Zhengqian Tu   +5 more
doaj   +1 more source

A non-coherent holographic correlator based on a digital micromirror device [PDF]

Компьютерная оптика, 2018
The possibility of application of a digital micromirror device (DMD) as a spatial light modulator for outputting holographic filters in an optical correlator illuminated by quasi-monochromatic spatially incoherent radiation was discussed.
Vladislav Rodin
doaj   +1 more source

Holographic aberration correction: optimising the stiffness of an optical trap deep in the sample [PDF]

, 2011
We investigate the effects of 1st order spherical aberration and defocus upon the stiffness of an optical trap tens of μm into the sample. We control both these aberrations with a spatial light modulator. The key to maintain optimum trap stiffness over a
Bowman, Bowman, Cižmár, Curtis, Gibson, Graham Gibson, Huang, Jesacher, Ke, Maria Dienerowitz, Miles Padgett, Padgett, Reicherter, Reihani, Reihani, Richard Bowman, Rohrbach, Sheppard, Sheppard, Sinclair, Theofanidou, Vellekoop, Wulff   +22 more
core   +1 more source

A deep learning-based method of acoustic holographic lens generation for transcranial focused ultrasound

AIP Advances
Acoustic holographic lenses provide the potential for transcranial focusing because they enable one to accurately and economically overcome distortion caused by the skull on ultrasonic waves.
Mengxu Bu, Wenting Gu, Boyi Li, Qiuchen Zhu, Xue Jiang, Xiaojun Song, Xin Liu   +6 more
openalex   +2 more sources

Single-shot digital holographic microscopy based on computational telecentricity using a single-arm off-axis interferometer

ICT Express, 2018
We propose a single-shot digital holographic microscopy based on computational telecentricity with a single-arm off-axis interferometer (SA-OAI), which is composed of optical recording, computational compensation and retrieving processes.
Seong-Jin Park, Byung-Mok Kim, Eun-Soo Kim   +2 more
doaj   +1 more source