نتایج جستجو برای: optical measurement

تعداد نتایج: 689845  

Journal: :The Review of Laser Engineering 2002

2001
Mark Froggatt Eric Moore Matthew Wolfe

As optical communications systems begin to fill the available bandwidth in an optical fiber by transmitting either 40 Gb/s on 200 GHz channel spacings or 10 Gb/s on 50 GHz channel spacings, the optical phase response of the components deployed in the systems will need to be carefully controlled. The dominant method of obtaining this optical phase measurement is commonly called the modulation ph...

Journal: :international journal of occupational hygiene 0
faramarz madjidi department of occupational hygiene engineering, school of health, zanjan university of medical sciences, zanjan, iran.

high intensity optical radiation can cause damage to the eye and intense radiation in the range of 770-1400 nm can cause thermal retinal damage. in the workplaces where there are high temperature sources, the workers in front of these hot  sources without bright light maybe exposed to the  intense ir radiation, thus regular measurement of these radiations seems crucial. measurement of ir radiat...

Journal: :IEICE Electronic Express 2010
Muneki Nakada Chongho Chong Atsushi Morosawa Keiji Isamoto Takuya Suzuki Hiroyuki Fujita Hiroshi Toshiyoshi

This paper presents the first successful demonstration of all-optical MEMS (microelectromechanical system) fiber endoscope for OCT (optical coherence tomography) measurement. A MEMS optical scanner for spatial light modulation has been assembled in the endoscope probe head (φ 6mm) with optical components and a photovoltaic cell. Actuation energy for the MEMS scanner is optically supplied by usi...

Journal: :The international journal of medical robotics + computer assisted surgery : MRCAS 2018
Changhan Jun Ryan Decker Dan Stoianovici

BACKGROUND In image-guided robotic interventions, an error component is related to the positioning error of the manipulator. Therefore, measuring the kinematic error is required during robot development. However, no specialized measurement device exists for this task. This study explores the possibility of using optical tracking for robot measurement. METHODS A CNC machine is used to position...

2007
Igor Vayshenker Xiaoyu Li David J. Livigni Thomas R. Scott Christopher L. Cromer

The optical fiber power meter (OFPM) is perhaps the most common type of test equipment used to support the development and implementation of optical fiber systems. To address the inherent metrology requirements, NIST has developed and implemented measurement services to help characterize these instruments [1]. These measurement services consist primarily of absolute laser power calibrations usi...

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