نتایج جستجو برای: optical multi

تعداد نتایج: 719538  

2016
Woojae Choi Ryung Shin Jiseok Lim Shinill Kang

In this study, a design methodology for a multi-optical probe confocal imaging system was developed. To develop an imaging system that has the required resolving power and imaging area, this study focused on a design methodology to create a scalable and easy-to-implement confocal imaging system. This system overcomes the limitations of the optical complexities of conventional multi-optical prob...

2016
Viet Dung Do Dong-Min Woo

This paper presents a hierarchical multi-resolution estimation of optical flow for a vehicle tracking system which can be used in a practical environment. Aiming at accurate estimation of optical flow, we construct a strong feature tracking system based on the Shi-Tomasi approach. As a feature detector, we use a Scale-Invariant Feature Transform (SIFT) algorithm, which not only firmly focuses o...

2002
Keyao Zhu Hongyue Zhu Biswanath Mukherjee

In this paper, we investigate the problem of efficiently provisioning connections of different bandwidth granularities in a heterogeneous WDM mesh network through dynamic traffic-grooming schemes under traffic-engineering (TE) principles. Due to the huge amount of traffic a WDM backbone network can support and the large geographic area it can cover, constructing and upgrading such an optical WD...

2013
Jianfei Liu Kalpathi R. Subramanian Terry S. Yoo

Automatic co-alignment of optical and virtual colonoscopy images can supplement traditional endoscopic procedures, by providing more complete information of clinical value to the gastroenterologist. In this work, we present a comparative analysis of our optical flow based technique for colonoscopy tracking, in relation to current state of the art methods, in terms of tracking accuracy, system s...

Journal: :Optica 2014
Liren Zhu Lei Li Liang Gao Lihong V Wang

Optical resolution photoacoustic microscopy (OR-PAM), while providing high lateral resolution, has been limited by its relatively poor acoustically determined axial resolution. Although this limitation has been tackled in recent works by using either broadband acoustic detection or nonlinear photoacoustic effects, a flexible solution with three dimensional optical resolution in reflection mode ...

2012
Jianglong Zhang

Accurate visibility forecasts, being necessary for military operations and field applications of opticallysensitive equipment such as advanced electro-optical (EO) systems, remain as a challenging scientific problem. One reason is because large spatial and temporal variations exist, not only with aerosol physical and optical properties, but with emission sources. Clearly, to further advance aer...

Journal: :IEICE Transactions 2009
Tetsuya Kawanishi Takahide Sakamoto Akito Chiba

We present recent progress of high-speed Mach-Zehnder modulator technologies for advanced modulation formats. Multi-level quadrature amplitude modulation signal can be synthesized by using parallel Mach-Zehnder modulators. We can generate complicated multi-level optical signals from binary data streams, where binary modulated signals are vectorially summed in optical circuits. Frequency respons...

Journal: :Optics express 2005
Cynthia Jensen-McMullin Henry P Lee Edward R Lyons Lyons

We demonstrate a multi-functional optical trap capable of trapping, motion control, position sensing and fluorescence detection of chemically treated polystyrene beads, using off-the-shelve optical components. It consists of two collinearly aligned single-mode fibers separated by a spacing of 130-170mum for trapping, another single-mode fiber for probing/pumping and a fourth multi-mode fiber fo...

2013
Erick Sutanto Yafang Tan M. Serdar Onses Brian T. Cunningham Andrew Alleyne

The Electrohydrodynamic-jet (E-jet) printing process combines high resolution printing with a large variety of printing materials, making E-jet suitable for applications ranging from flexible electronics to high resolution biosensors. In this article, we explore a novel E-jet printing application fabricating high-resolution micro-optical devices. Examples given are a microlens array, an optical...

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