Results 81 to 90 of about 1,253,282 (331)
Depth of Field Enhanced Integral Imaging Display System
PhotonicsLarge depth of field (DOF) is a core pursuit in integral imaging (InIm). In this paper, we propose a DOF-enhanced InIm display system comprising a transmissive mirror device (TMD), a semi-transparent mirror (STM), two 2D displays, and a micro-lens array (
Xiao-Li Ma +7 more
doaj +1 more source
Focus Stacking: Extending depth of field in close-up photography [PDF]
, 2016 When taking close-up photographs, or indeed any photographs, there is a delicate balance of factors that allow us to limit or to maximise the parts of an image that are in focus; Aperture, Lens focal length and Subject distance.
Bryson, David
core
X-ray ptychography with extended depth of field.
Optics Express, 2016 Ptychographic X-ray computed tomography is a coherent diffractive imaging method that offers nanometer-scale resolution with quantitative contrast.
Esther H. R. Tsai +4 more
semanticscholar +1 more source
Annals of Clinical and Translational Neurology, EarlyView.Epigenetic reprogramming in hematopoietic stem and progenitor cells (HSPCs) and downstream myeloid cells, mediated by H3.3 downregulation and endogenous retroelement (ERE) overexpression, contributes to the progression of multiple sclerosis (MS). ABSTRACT Background Skewed myelopoiesis in the bone marrow has been identified as a key driver of multiple ...
Li‐Mei Xiao +6 more
wiley +1 more source
Frontiers in MedicinePurposeTo compare visual outcomes, depth of field (DOF), spectacle independence, and patient satisfaction of cataract patients with and without previous myopic laser in situ keratomileusis (LASIK) surgery who received a non-diffractive extended range-of ...
Wei Fan +17 more
doaj +1 more source
Depth-sensing technology using a negative microlens array
International Journal of Optomechatronics, 2021 In this study, an optical depth-sensing system whose focus distance was equal to its object distance was constructed by using a lens with a shortened depth of field.
Chih-Hsiung Lin, Kun-Huang Chen
doaj +1 more source
The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp +4 more
wiley +1 more source
Sensors, 2014 In high frequency ultrasound imaging (HFUI), the quality of focusing is deeply related to the length of the depth of field (DOF). In this paper, a phase-inversion technique implemented by a dual-element transducer is proposed to enlarge the DOF.
Jong Seob Jeong
doaj +1 more source
Integral imaging with large depth of field using an asymmetric phase mask [PDF]
, 2007 We propose to improve the depth of field of Integral Imaging systems by combining an array of phase masks with the traditional lenslet array. We show that obtained elemental images are sharp over a larger range than with a regular lenslet array.
YANN FRAUEL +1 more
core
Inverse sinusoidal phase mask to extend the depth of field of incoherent imaging systems
, 2016 Wavefront coding is an effective way to extend the depth of field of an incoherent imaging system. With a suitable phase mask, the defocus invariant imaging characteristic of an incoherent imaging system can be achieved. In this paper, an effective way
Wenji She +8 more
core +1 more source