Results 121 to 130 of about 7,236 (164)

Angular tilt misalignment loss at a GRIN rod lens coupler

Applied Optics, 1986
A geometric optics model for evaluating end separation and transverse offset losses at a graded-index (GRIN) rod lens to lens coupler is extended to the case of angular tilt misalignment loss. Two different fiber–lens combinations are examined, and the model is verified by comparison to experimental measurements, which show close agreement to the ...
S D, Cusworth, J M, Senior
openaire   +2 more sources

Effects of angular misalignments on fiber-optic alignment automation

Optics Communications, 2001
Automation of fiber-to-optic alignment is critical to the development of cost effective fiber-optic component manufacturing technologies. Key to the alignment automation is the angular alignment automation, which is now unavailable. But angular misalignments are unavoidable in practical fiber-optic aligning process.
Z. Tang, R. Zhang, F.G. Shi
openaire   +1 more source

Effects of angular misalignment on optical klystron undulator radiation

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015
Abstract In this paper ,we analyze the important effects of optical klystron undulator radiation with an angular offset of the relativistic electron beam in the second undulator section. An anlytical expression for the undulator radiation is obtained through a transparent and simple procedure.It is shown that the effects of the angular offset is more
G. Mishra, Bramh Prakash, Mona Gehlot
openaire   +1 more source

Reentry-vehicle dispersion from entry angular misalignment

4th Atmospheric Flight Mechanics Conference, 1978
Abstract : An approximate solution is obtained for the dispersion of a reentry vehicle caused by an initial angular misalignment between the vehicle axis of symmetry and the velocity vector at entry into the atmosphere. The dispersion depends on the exoatmospheric motion, which determines the precession mode of the lift vector during angle-of-attack ...
openaire   +1 more source

Noise Radiation by Rotating Machine Subject to Angular Misalignment

Building Acoustics, 2007
Rotating machine dysfunction is often caused by shaft misalignment. This defect generates concentrated or distributed loads that produce vibrations and noise. These vibrations depend on the machine itself through the transfer function while the noise is a function of the machine environment.
Molka Attia Hili, Tahar Fakhfakh, Mohamed Haddar   +2 more
openaire   +1 more source

Mitigating angular misalignment from atmospheric effects in FSO links

SPIE Proceedings, 2007
Accuracy of alignment is a key factor for successfully establishing and maintaining connections in networks of freespace optical links, and is particularly critical when one or both of the transceivers are moving. Scintillation and other atmospheric effects create beam deflections that further complicate the alignment process by creating rays that ...
Peter G. LoPresti, Hazem Refai, James J. Sluss   +2 more
openaire   +1 more source

Angular Misalignment Effect on the Dynamic Behavior of Bearings

International Journal of Mechanical Engineering Education, 2006
Dysfunction of rotating machines is often caused by shaft misalignment. This defect generates some important loads and vibrations, and can lead to a premature failure of a bearing, shaft or coupling. The objective of this study is to survey angular misalignment. The first part deals with the development of a theoretical model describing the phenomenon.
Molka Attia Hili, Tahar Fakhfakh, Lotfi Hammami, Mohamed Haddar   +3 more
openaire   +1 more source

Both Tilt and Misalignment are Manifestations of Angular Induction

Perceptual and Motor Skills, 1993
With a Poggendorff configuration one sees two obliques as being misaligned, and with a Judd configuration one sees them as having different tilts, i.e., as being misoriented. It has been suggested that these are separate illusory effects. I submit, however, that one can see misorientation in the double Poggendorff and misalignment with a Judd-like ...
openaire   +2 more sources

Study on the running torque of angular contact ball bearings subjected to angular misalignment

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2017
Angular misalignment is unavoidable in most applications of rolling-element bearings. The goal of this study is to examine the effects of angular misalignment on the running torque of angular contact ball bearings. A computational method to calculate the running torque of misaligned angular contact ball bearings was introduced.
Van-Canh Tong, Seong-Wook Hong
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Skidding analysis of angular contact ball bearing subjected to radial load and angular misalignment

Journal of Mechanical Science and Technology, 2019
Skidding is a phenomenon that frequently occurs in ball–raceway contact areas of bearings and often leads to their early failure. This paper presents a skidding analysis of angular contact ball bearings (ACBBs) subjected to various boundary conditions. A five degrees-offreedom quasi-static model for ACBBs was employed to investigate skidding with ball ...
Laily Oktaviana, Van-Canh Tong, Seong-Wook Hong   +2 more
openaire   +1 more source