A new spectroscopic method using the Fraunhofer diffraction pattern

1984 ◽  
Vol 5 (7) ◽  
pp. 985-996 ◽  
Author(s):  
Bao-chang Zhao ◽  
Masato Tazawa ◽  
Atsuo Kitade ◽  
Kunio Yoshihara
Keyword(s):  
Diffraction Pattern ◽  
Spectroscopic Method ◽  
Fraunhofer Diffraction

Study of Fraunhofer Diffraction Pattern from a Circular Aperture Using an Optical Fiber Microprobe

2011 ◽  
Vol 378-379 ◽  
pp. 565-568
Author(s):  
Wan Maisarah Mukhtar ◽  
P. Susthitha Menon ◽  
Sahbudin Shaari
Keyword(s):  
Optical Fiber ◽  
Diffraction Pattern ◽  
Light Propagation ◽  
Optical Power ◽  
Transverse Motion ◽  
Circular Aperture ◽  
Fraunhofer Diffraction ◽  
Fresnel Number ◽  
Function Profile ◽  
Effect Of Light

Fraunhofer diffraction pattern from a circular aperture with the diameter of 10µm was observed using an optical fiber microprobe. The optical fiber microprobe started to detect optical power when the distance between the probe and the circular aperture was more than 292µm. When the probe was moved in a lateral motion, the light propagation showed a Bessel function profile. When the optical fiber microprobe was moved from 293µm to 309µm from the centre of the circular aperture in a transverse motion, the power detected was not consistent with a continuation of maxima and minima due to the effect of light propagation from the circular aperture. We also observed that the distance between the probe and the centre of the circular aperture was directly proportional with the radius of focused spot and inversely proportional with the Fresnel number.

scholarly journals Potentialities of the digital holography in the study of the Fraunhofer diffraction pattern of microscopic objects

2011 ◽  
Vol 274 ◽  
pp. 012067 ◽  
Author(s):  
J O Ricardo ◽  
M Muramatsu ◽  
F Palacios ◽  
M Gesualdi ◽  
O Font ◽  
...  
Keyword(s):  
Diffraction Pattern ◽  
Digital Holography ◽  
Fraunhofer Diffraction

Analytical Fraunhofer diffraction pattern for the semicircle aperture

2003 ◽  
Author(s):  
Alfonso Padilla-Vivanco ◽  
Jose Javier Baez-Rojas
Keyword(s):  
Diffraction Pattern ◽  
Fraunhofer Diffraction

Impact of aperture thickness on a Fraunhofer diffraction pattern

2019 ◽  
Vol 21 (4) ◽  
pp. 045605 ◽  
Author(s):  
Mojtaba Golshani ◽  
Mostafa Motamedifar
Keyword(s):  
Diffraction Pattern ◽  
Fraunhofer Diffraction

Hybrid pattern recognition using the Fraunhofer diffraction pattern

1984 ◽  
Vol 51 (4) ◽  
pp. 221-226 ◽  
Author(s):  
Takumi Minemoto ◽  
Izumi Tsuchimoto ◽  
Satoshi Imi
Keyword(s):  
Pattern Recognition ◽  
Diffraction Pattern ◽  
Fraunhofer Diffraction

Electron diffraction from cylindrical nanotubes

1994 ◽  
Vol 9 (9) ◽  
pp. 2450-2456 ◽  
Author(s):  
L.C. Qin
Keyword(s):  
Carbon Nanotubes ◽  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Pitch Angle ◽  
Bessel Functions ◽  
Structural Parameters ◽  
Fraunhofer Diffraction ◽  
Projection Approximation ◽  
Cylindrical Nanotubes ◽  
Diffraction Patterns

Electron diffraction intensities from cylindrical objects can be conveniently analyzed using Bessel functions. Analytic formulas and geometry of the diffraction patterns from cylindrical carbon nanotubes are presented in general forms in terms of structural parameters, such as the pitch angle and the radius of a tubule. As an example the Fraunhofer diffraction pattern from a graphitic tubule of structure [18,2] has been simulated to illustrate the characteristics of such diffraction patterns. The validity of the projection approximation is also discussed.

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