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Fresnel diffraction at an opaque strip expressed by means of asymptotic representations of Fresnel integrals

in a Fresnel diffraction pattern at an opaque straight strip illuminated with a spherical intensity distribution in a Fresnel diffraction at a half plane. The area of validity is defined through width of the geome...

BH - Optika, masery a lasery

  • 2012
  • Jx
  • Link
Result

Off-axis Fresnel diffraction approximation

Diffraction is analyzed for oblique propagation of light beam under a large angle. Fresnel diffraction approximation is valid provided the beam is deflected into the direction of oblique propagation, the structure of the

BH - Optika, masery a lasery

  • 2007
  • Jx
Result

Off-axis Fresnel diffraction approximation

Diffraction is analyzed for oblique propagation of light beam under a large angle. Fresnel diffraction approximation is valid provided the beam is deflected into the direction of oblique propagation, the structure of the

JA - Elektronika a optoelektronika, elektrotechnika

  • 2005
  • D
Result

Multi-focus diffractive optical elements

The paper Multi-focus diffractive optical elements describes the original idea of the Fresnel transform that has been incorporated into the IFTA algorithm and used for optimization of the Fresnel-domain diffractive...

BH - Optika, masery a lasery

  • 2003
  • D
Result

Restricted Beam Analysis for FSO Links

The paper describes propagation model of optical wave diffraction that occurs at the transmitter aperture based on scalar diffraction theory. Furthermore, transmitted power of restricted elliptical beam is calculated....

JA - Elektronika a optoelektronika, elektrotechnika

  • 2012
  • D
Result

The simulation of the origin and propagation of speckle field generated through a plane wave and Gaussian beam and its verification by speckle correlation method

This paper presents a simulation model of the origin and propagation of speckle field within the Fresnel approximation and verification of the model through a speckle correlation method for determination of in-plane object's translation. The...

BH - Optika, masery a lasery

  • 2012
  • Jx
  • Link
Result

Diffraction by perfect and imperfect amplitude grating

The paper presents theoretical formulas for calculation of diffraction by perfect infinite and finite amplitude gratings with Fresnel and Fraunhofer approximations. Further, general formulas for diffraction by an imperfect ...

Optics (including laser optics and quantum optics)

  • 2020
  • Jimp
  • Link
Result

Laser beam shaping by binary and multi-level phase-only diffractive optical elements

The contribution Laser beam shaping by binary and multi-level phase-only diffractive optical elements focuses on the study and comparison of different design methods for designing phase-only diffractive optical elements (PDOEs) for ...

BH - Optika, masery a lasery

  • 2001
  • D
Result

Rotation Stage of Optical Lithograph for Synthetic Holography

Rotationally symetric diffractive elements serve to form a laser beam profile (e.g. Fresnell diffractive plate) and are able to compensate the abberations of optical systems. According to acquire the ability to manufacture ...

JR - Ostatní strojírenství

  • 2006
  • D
Result

Wave Effects in FSO Links and Their Influence on Transmitted Laser Beam

The paper introduces a propagation model of light wave which takes into consideration diffraction effects on transmitter aperture. Scalar diffraction theory was applied and its results were used in the model developed in the MATLAB ...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2011
  • D
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