Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Fresnel integral


Related Topics

In the News (Tue 14 Feb 12)

  
  Fresnel zone - Wikipedia, the free encyclopedia
In optics and radio communications, a Fresnel zone (pronounced FRA-nel Zone), named for physicist Augustin-Jean Fresnel, is one of a (theoretically infinite) number of a concentric ellipsoids of revolution which define volumes in the radiation pattern of a (usually) circular aperture.
The concept of Fresnel zones may also be used to analyze interference by obstacles near the path of a radio beam.
For establishing Fresnel zones, we must first determine the RF Line of Sight (RF LoS), which in simple terms is a straight line between the transmitting and receiving antennas.
en.wikipedia.org /wiki/Fresnel_zone   (321 words)

  
 Fresnel integral - Wikipedia, the free encyclopedia
In mathematics and optics, the two Fresnel integrals, S(x) and C(x), arise in the description of near field Fresnel diffraction phenomena, and are the integrals defined as follows:
It is possible (but not trivial) to evaluate the Fresnel integrals in the limits, we have
As R goes to infinity, the integral around the line segment on the edge of the circle will tend to 0, the one along the real axis will tend to the well known Gaussian integral
en.wikipedia.org /wiki/Fresnel_integral   (383 words)

  
 Fresnel Integrals   (Site not responding. Last check: 2007-10-08)
Fresnel functions are integrals that involve quadratic equations in the sine and cosine functions.
The Fresnel integrals are used in diffraction theory.
If you have an integral with an x^2 in the sine or cosine function, then all you have to do is isolate part of the equation that is identitcal to the definitions above.
www.csh.rit.edu /~topher/math/fresnel.html   (232 words)

  
 Abstract   (Site not responding. Last check: 2007-10-08)
The accuracy and efficiency of the numerical quadrature of the Kirchhoff integrals is studied.
The Fresnel zones are then derived as the minimum areas of integration with the specified accuracy.
The definition of Fresnel zones is expressed in terms of the first and second derivatives of the sum of travel times along the surface of integration.
sw3d.mff.cuni.cz /papers/r1lk1.htm   (180 words)

  
 [No title]
Give the result of the integral for each N value and comment on how error changes with N. Use the Romberg integration method to compute the integral by using the composite Simspson’s rule for N=1,2,4,8,16.
Give the result of the integral for each N value and compare the error with the corresponding error in the trapezoidal rule (Note that to make a fair comparison, the total number of data points used in each method must be same).
Compute the integral by using the Gaussian quadrature method with 8 points.The data points (abscissas) and weights for 8 data points are given in files abscissas.dat and weights.dat, respectively.
www.eee.metu.edu.tr /~lalatan/EE443/hw4.doc   (389 words)

  
 fund_thm_calc.html
In many cases the integral cannot be evaluated in closed form.
This function is a common function in physics called the Fresnel sine integral.
While the integral cannot be evaluated in closed form, this function is so common that its values have been numerically tabulated.
www.math.uga.edu /calclab/calclab2210/fund_thm_calc1.html   (490 words)

  
 Fresnel Diffraction theory
Fresnel diffraction theory is a scalar diffraction theory.
We can evaluate k-space integral by completing the square in the exponent.
The Fresnel diffraction integral in the paraxial approximation is the convolution of u(x
electron9.phys.utk.edu /optics507/modules/m4/fresnel_diffraction_theory.htm   (338 words)

  
 EOP541L - Laboratory 5
To study the Fresnel diffraction pattern from an opaque strip.
Compute the theoretical Fresnel diffraction pattern for parameter values matching those used in your measurement and compare your experimental results with the theoretical curve.
We will use the geometry depicted below where the slit of width w is translated in a plane located a distance D from the line source S and where the pattern is measured with a detector located at P, a distance D' from the slit plane.
www.engr.udayton.edu /ElOptics/courses/eop541l/lab5.html   (558 words)

  
 Rectangle Window: Large Fresnel Integral Limits Approximation
This is, in actuality, claiming that the ``ringing" seen in Fresnel integrals has died out by the end of the particular integration frame.
Therein we also show a very elegant fact: two ways of conceptualizing the attenuation of the sinusoids are mathematically equivalent.
Those methods are the liftering mentioned in the second bullet above, and consideration of the Hann window as a direct attenuator of Fresnel ringing in the time domain.
ccrma-www.stanford.edu /~asmaster/fresnelanalpaper/fresnelanal/node23.html   (1174 words)

  
 Laplace Transform and complex contours   (Site not responding. Last check: 2007-10-08)
It should be apparent that you're dealing with the Fresnel integral functions with the usual results.
I suspect then even when I do master the contour integral, a closed-form solution for other values of alpha will NOT be attainable and thus I will have to resort to numerical methods of computing the inverse transforms.
for the second integral with the results that the line integral in that case is:
www.physicsforums.com /showthread.php?t=97932   (2316 words)

  
 Integrals
An example of a definite integral can be thought of as finding the area under a curve (as represented by an algebraic expression or function) between particular values of the function's variable.
In practice, integral calculus provides scientists with a powerful tool for doing calculations that involve a continually varying quantity (such as determining the position at any given instant of a space rocket that is accelerating away from Earth).
The Expression Calculator can calculate integrals with a precision that often rivals with powerful mathematical software such as Mathematica or Maple.
excalc.vestris.com /docs/ref-integrals.html   (160 words)

  
 [No title]
The hyperbolic sine integral is defined by $Shi(z)=\int_{0}^{z} \frac{sinht}{t} dt$.
The Fresnel integral $S(z)$ is defined by $S(z)=\int_{0}^{z} sin(\frac{\pi}{2}t^2)dt$.
The Clausen integral is defined as $f(\theta)=-\int_{0}^{\theta}ln(2sin\frac{t}{2})dt =\sum_{k=1}^{\infty}\frac{sink\theta}{k^2}$ $(0 \leq \theta \leq \pi)$.
www.csd.uwo.ca /faculty/watt/home/research/openmath/spfun1.ocd   (3083 words)

  
 [No title]
All the rest are simply returned in integral form.
Not a great surprise, as for N=2 the result is a Fresnel integral, and for larger n it is expressible as complex incomplete gamma functions, both of which are not builtin to the 49G.
The Xt stuff is a change of variable and the 4x's way of saying it can't solve the integral.
www.hpmuseum.org /cgi-sys/cgiwrap/hpmuseum/archv013.cgi?read=44502   (900 words)

  
 Miscellaneous Functions
Some books define the exponential integral of order 1 as the exponential integral:
The sine and cosine integrals are defined as:
The Fresnel sine and cosine integrals are defined as:
www.efunda.com /math/miscellaneousfun/miscellaneousfun.cfm   (62 words)

  
 nrich.maths.org::Mathematics Enrichment::NRICH
It is a type of integral called a Fresnel Integral and has important applications in the physics of diffraction and how to drive a motorcar round a corner quickly.
Is it possible to prove that the Fresnel integrals cannot be evaluated in closed form?
By the way, another physics problem that needs Fresnel integrals is in the one-one section, in the Erratic Non-Linear oscillators topic.
www.nrich.maths.org.uk /askedNRICH/edited/449.html   (464 words)

  
 The Mathematica Book Online: Advanced Mathematics in Mathematica | Mathematical Functions
Thus, for example, integral representations of functions are valid only when the integral exists, but the functions themselves can usually be defined elsewhere by analytic continuation.
Polylogarithm functions appear in Feynman diagram integrals in elementary particle physics, as well as in algebraic K-theory.
The Lerch transcendent is related to integrals of the Fermi-Dirac distribution in statistical mechanics by
documents.wolfram.com /mathematica/book/section-3.2.11   (2167 words)

  
 00007554-Introduction to Wave Optics   (Site not responding. Last check: 2007-10-08)
Recall the complex representation of plane and spherical waves; justify the form of the Huygens-Fresnel diffraction integral; explain the propagation of plane and
Demonstrate competence in accessing learning via the Blackboard internet-based virtual learning environment, and in the use of on-line discussion boards.
Fresnel diffraction and the point of stationary phase:
www.info.rdg.ac.uk /module/Masters/PHMDA1.htm   (284 words)

  
 DIFFRACTION THEORY
Fresnel Integral- Corrects for obliquity, makes simplying assumptions.
Integral Transforms - Fresnel's equation can be structured as an integral equation with a kernal to handle coordinate transformations
Fourier Integral Transform - Adds a few more assumptions (especially the assumption stated in the following equation (where w is the width of the aperture):
www.marquette.edu /courses/phys/matthysd/L1980226.htm   (155 words)

  
 Extended precision special functions library
* The integral is evaluated by either a power series or * continued fraction expansion, depending on the relative * values of a and x.
* * This is accomplished using the inverse beta integral * function and the relations * * z = incbi(df2/2, df1/2, p) * x = df2 (1-z) / (df1 z).
(b) - * 0 * * The incomplete gamma integral is used, according to the * relation * * y = igam(b, ax).
www.netlib.org /cephes/qlibdoc.html   (5763 words)

  
 [No title]   (Site not responding. Last check: 2007-10-08)
From: ron@dorianresearch.com (Ron Levine) Subject: Re: Fresnel Integrals Date: Fri, 13 Aug 1999 00:16:01 GMT Newsgroups: sci.math On Thu, 12 Aug 1999 18:54:05 -0500, "Anthony J. Bruni" wrote: >What is a good reference for Fresnel Integrals?
These are defined as integral(cos(pi v^2/2)dv) and integral(sin(pi v^2/2)dv) and give respectively the x and y coordinate as functions of arclength of an amusing curve called "Cornu's Sprial", which comes up via geometric construction in analyzing the phenomenon of Fresnel diffraction.
Jenkins and White gives a table of their values as functions of the upper limit.
www.math.niu.edu /~rusin/known-math/99/fresnel   (150 words)

  
 integral   (Site not responding. Last check: 2007-10-08)
Integral of fitted polynomial in Chebyshev series form
Degenerate symmetrised elliptic integral of 1st kind R
General elliptic integral of 2nd kind F(z,k',a,b) of complex argument
www.rdg.ac.uk /ITS/aac/Nag/F77/flsol20da/NAGdoc/fl/html/indexes/kwic/integral.html   (62 words)

  
 The Optics Project - Modules - Theory - Fresnel Single Slit   (Site not responding. Last check: 2007-10-08)
Very accurate numerical routines exist for calculating the Fresnel integral functions.
However for our purposes speed of calculation is very important and we chose to evaluate them in the following way.
0.002 and the last four formulas allow the Fresnel integral function to be calculated very rapidly.
webtop.msstate.edu /top/mod_fres_slit_the.html   (216 words)

  
 Using the Symbolic Math Toolbox (Symbolic Math Toolbox)
This allows you to evaluate functions that are not available in standard MATLAB, such as the Fresnel cosine integral.
For example, suppose you want to evaluate the hyperbolic cosine integral at the points 2+i, 0, and 4.5.
The hyperbolic cosine integral has a singularity at z = 0.
www.technion.ac.il /guides/matlab/toolbox/symbolic/ch223.html   (182 words)

  
 [33B20] -- Incomplete beta and gamma functions (error functions, probability integral, Fresnel integrals)   (Site not responding. Last check: 2007-10-08)
Incomplete beta and gamma functions (error functions, probability integral, Fresnel integrals)
Pinelis, I. Monotonicity Properties of the Relative Error of a Padé Approximation for Mills' Ratio, Volume 3, Issue 2, Article 20, 2002.
All correspondence should be directed to the editorial office.
www.maths.soton.ac.uk /EMIS/journals/JIPAM/subj_classf/33B20.htm   (90 words)

  
 Increasing Chirp C.D. Phase Proof   (Site not responding. Last check: 2007-10-08)
Next, we approximate the sums therein with integrals.
Then, we manipulate these integrals into Fresnel integral form (seen in the previous section).
Tighter Error Bound on the Inverse Midpoint Integral Approximation
ccrma-www.stanford.edu /~asmaster/fresnelanalpaper/fresnelanal/node13.html   (167 words)

  
 Electromagnetic Waves and Antennas   (Site not responding. Last check: 2007-10-08)
Hallen and Pocklington integral equations, delta-gap and plane-wave sources, solving Hallen's equation, sinusoidal current approximation, reflecting and center-loaded receiving antennas, King's three-term approximation, numerical solution of Hallen's equation, numerical solutions using pulse functions and for arbitrary incident field, numerical solution of Pocklington's equation.
Physical constants, electromagnetic frequency bands, vector identities and integral theorems, Green's functions, coordinate systems, Fresnel integrals, Lorentz transformations, list of MATLAB functions.
Numerical methods for solving the Hallen and Pocklington integral equations for single and coupled antennas and computing self and mutual impedances.
www.ece.rutgers.edu /~orfanidi/ewa   (2045 words)

  
 Fresnel integral   (Site not responding. Last check: 2007-10-08)
The formula defines the Fresnel cosine integral C(x) and the Fresnel sine integral S(x):
The Fresnel integral has important applications in the physics of diffraction and is used in the theory of driving motorcar round a corner quickly.
The curve can be expanded in terms of the spherical Bessel function of the first kind.
www.2dcurves.com /trig/trigf.html   (62 words)

  
 [No title]   (Site not responding. Last check: 2007-10-08)
Briefly, describe the several special case in which the Fresnel integral is easily evaluated (page 417-) starting with the "special form" (Eq.
Comment on the Fresnel integrals (page 426-), the "complex Fresnel integral" (Eq.
Comment on the Fresnel diffraction pattern for a circular aperture (page 438-, Fig.
www.ece.utexas.edu /~friedric/47HW24   (232 words)

  
 List KWIC PACS and MSC+ZDM E-N lexical connection
integral equations) # functional equations (definition of functions.
integral equations, numerical integration and differentiation) # numerical analysis (numerical solution of differential and
integral, Fresnel integrals) # incomplete beta and gamma functions (error functions, probability
www.math.unipd.it /~biblio/kwic/msc-pacs/pml_11_045.htm   (1393 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.