نتایج جستجو برای: optical imaging system

تعداد نتایج: 2807792  

2004
Arnab Sinha George Barbastathis Wenhai Liu

Demetri Psaltis, FELLOW SPIE California Institute of Technology Department of Electrical Engineering 1200 East California Boulevard MS 136-93 Pasadena, California 91125 Abstract. We present an overview of imaging systems that incorporate a volume hologram as one of the optical field processing elements in the system. We refer to these systems as volume holographic imaging (VHI) systems. The vol...

Journal: :Biomedical microdevices 2010
Karthik Kumar Rony Avritscher Youmin Wang Nancy Lane David C Madoff Tse-Kuan Yu Jonathan W Uhr Xiaojing Zhang

A handheld, forward-imaging, laser-scanning confocal microscope (LSCM) demonstrating optical sectioning comparable with microtome slice thicknesses in conventional histology, targeted towards interventional imaging, is reported. Fast raster scanning (approximately 2.5 kHz line scan rate, 3.0-5.0 frames per second) was provided by a 2-axis microelectromechanical system (MEMS) scanning mirror fab...

2013
Alex M. H. Wong George V. Eleftheriades

Optical microscopy suffers from a fundamental resolution limitation arising from the diffractive nature of light. While current solutions to sub-diffraction optical microscopy involve combinations of near-field, non-linear and fine scanning operations, we hereby propose and demonstrate the optical super-microscope (OSM) - a superoscillation-based linear imaging system with far-field working and...

Journal: :The British journal of dermatology 2012
S A Sharif E Taydas A Mazhar R Rahimian K M Kelly B Choi A J Durkin

Port-wine stain (PWS) birthmarks are one class of benign congenital vascular malformation. Laser therapy is the most successful treatment modality of PWS. Unfortunately, this approach has limited efficacy, with only 10% of patients experiencing complete blanching of the PWS. To address this problem, several research groups have developed technologies and methods designed to study treatment outc...

2012
Ke Si Reto Fiolka Meng Cui

Fluorescence imaging has revolutionized biomedical research over the past three decades. Its high molecular specificity and unrivaled single molecule level sensitivity have enabled breakthroughs in a variety of research fields. For in vivo applications, its major limitation is the superficial imaging depth as random scattering in biological tissues causes exponential attenuation of the ballisti...

Journal: :BioTechniques 2010
Hyuckjoon Kwon Toshiteru Enomoto Masahiro Shimogawara Kazunori Yasuda Yoshihiro Nakajima Yoshihiro Ohmiya

Bioluminescence imaging reveals the long-term dynamics of individual gene expression in a single cell. However, methods for simultaneously imaging multiple gene expression patterns have been unknown to date. Here, we constructed a dual-path optical luminescence imaging system using a two-color reporter system and could simultaneously track two gene expression patterns for several days in a sing...

Journal: :CoRR 2017
Thomas Kirchner Janek Gröhl Lena Maier-Hein

Real-time monitoring of functional tissue parameters, such as local blood oxygenation, based on optical imaging could provide groundbreaking advances in the diagnosis and interventional therapy of various diseases. While photoacoustic (PA) imaging is a novel modality with great potential to measure optical absorption deep inside tissue, quantification of the measurements remains a major challen...

Journal: :Optics letters 1997
J A Izatt M D Kulkarni S Yazdanfar J K Barton A J Welch

We describe a novel optical system for bidirectional color Doppler imaging of flow in biological tissues with micrometer-scale resolution and demonstrate its use for in vivo imaging of blood flow in an animal model. Our technique, color Doppler optical coherence tomography (CDOCT), performs spatially localized optical Doppler velocimetry by use of scanning low-coherence interferometry. CDOCT is...

2005
James R. Fienup

One can decrease the complexity of imaging optics by increasing the demands on the illumination system or on post-detection computations. A lens-less coherent imaging system employing a shaped illumination pattern and phase retrieval is described. 2005 Optical Society of America OCIS codes: (110.0110) Imaging systems; (100.5070) Phase retrieval; (100.0100) Image processing; (100.3010) Image re...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید