Now showing items 31-40 of 135
Speckle photography with different pupils in a multiple-exposure scheme
(OPTICAL SOC AMER, 2000-01-01)
The use of different multiple-aperture pupils for recording each image in speckle photography is proposed. The introduction of suitable spatial frequency carriers, by internally modulating imaged speckles, allows one to ...
Holoprinter: study and development of a direct write synthetic full parallax holographic system
(Sociedad Espanola de Optica, 2018-12-01)
Holoprinters based on holographic stereograms (HS) have been developed to synthesize holograms by using 2D images with perspective information of 3D objects. The objects can be real or computer generated. HS has been applied ...
Fringe visibility analysis with different scale apertures in speckle photography
(TAYLOR & FRANCIS LTD, 2001-09-15)
The use of different scale aperture pupils for image recording in speckle photography is analysed. In particular a double-exposure specklegram is considered. The ensemble-average intensity in the Fourier plane is analytically ...
Multiple rotation assessment through isothetic fringes in speckle photography
(OPTICAL SOC AMER, 2007-05-10)
The use of different pupils for storing each speckled image in speckle photography is employed to determine multiple in-plane rotations. The method consists of recording a four-exposure specklegram where the rotations are ...
Improvement of the signal-to-noise ratio in digital holography
(Sociedad Mexicana de Fisica, 2005-01-01)
A fundamental problem in optical and digital holography is the presence of speckle noise in the reconstruction process, which essentially diminishes the signal to noise ratio (SNR). For many applications, that reduction ...
Optical processing by fringed speckles registered in a BSO crystal
An alternative image multiplexing technique, employing a multiple-aperture pupil for each exposure, is presented. The aperture arrangement of the pupil is modified between exposures. A thick photo-refractive BSO crystal ...
Dielectric properties characterization of high dielectric constant thick films
(John Wiley & Sons, 2010-10-01)
A technique for the characterization of microwave dielectric properties of high dielectric constant thick films at room temperature is proposed, using multilayered coplanar waveguide transmission lines with high dielectric ...
Characterization of SrTiO3 thin films at microwave frequencies using coplanar waveguide linear resonator method
(John Wiley & Sons Inc., 2011-07-01)
Obtención de estructuras de relieve en materiales de registro de haluros de plata
Diffraction transmission gratings were recorded in AGFA-8E75 film, chemically treated under processes with D-19 + potassium ferrocyanide and a chemical processing technique proposed for PE-2 film to obtain embossed stripes. ...
Microwave Frequency Characterization of Barium Titanate Films Obtained Via Sol-Gel
(Rev. Fac. Ing, 2019-12-03)
The present work focuses on the structural, morphological and dielectric characterization of barium titanate films (BTO or BaTiO3 due to its chemical formula) deposited by spin coating on crystalline silicon (Si) substrates ...