Results 181 to 190 of about 111,516 (212)
Some of the next articles are maybe not open access.
Talbot interferometer based on a birefringence grating
Optics Communications, 2000Abstract A 1-D coarse grating imaged onto a photorefractive Bi12SiO20 crystal is stored as modulation of birefringence. On this basis, the self-imaging phenomenon is implemented. When an analyzer is placed at the output of the crystal, the modulation of birefringence is converted into a modulation of transmission. In this case in the read-out process,
Myrian Tebaldi +2 more
openaire +1 more source
Calibration of Foci-Meter Based on Talbot-Moiré Interferometer
Laser and Optoelectronics Progress, 2014赵琦 Zhao Qi +8 more
exaly +2 more sources
Talbot interferometer with computer generated gratings
Optics Communications, 1983Abstract In a Talbot interferometer the self image of a periodic pattern, such as a Ronchi ruling of period d, illuminated by a monochromatic plane wavefront of wavelength λ, is formed at distances which are integral multiples of 2d2/λ. A refracting object placed in front of the Ronchi ruling distorts the self image.
C.S. Lim, V. Srinivasan
openaire +1 more source
Simplified Talbot Interferometers for Lens Testing
Optical Engineering, 1976Moire fringes and the Talbot self-imaging effect can be combined to produce shearing-interferometric-like maps of lens refractive power with high sensitivity and accuracy. Here we explore the properties of a simplified interferometer, consisting of a white-light source and two dissimilar gratings, designed to be rugged enough for field testing of ...
Stephen A. Benton, Dwight P. Merrill
openaire +1 more source
Talbot Interferometer for Radial and Lateral Derivatives
Applied Optics, 1972The theory and experimental evidence of a shearing interferometer based on the Talbot effect are presented. Multiple-shearing interferences are obtained that can be reduced to triple-shearing or doubleshearing interferences by the addition of simple spatial filtering.
openaire +2 more sources
Temporal impulse response of the Talbot interferometer
Optics Communications, 2007The Talbot interferometer has been shown earlier to act as an optical tapped delay-line in the time domain. The interferometer is based on the self-imaging effect. It consists of two gratings separated by a multiple of the self-imaging distance. Here, we determine its temporal behaviour experimentally.
Hans Knuppertz +2 more
openaire +1 more source
The study of wave motion in the Talbot interferometer with a lens
Wave Motion, 2015Abstract We present the study of the wave motion in the Talbot interferometer with an additional element such as a lens for all related audiences. Our solutions are in the analytic form. A general principle of the Talbot effect, which is the optical near-field effect, is the Fresnel diffraction. The Fresnel integral is rather complicated.
Sorakrai Srisuphaphon +1 more
openaire +1 more source
Journal of the Optical Society of America A, 2020
High sensitivity of collimation testing equipment is desirable where collimated beams are used for precise and accurate measurements. Precision in the setting of collimation depends on the sensitivity of the testing equipment. In the present work, sensitivity to beam collimation of the recently reported holographic shearing interferometer (HSI) [J. Opt.
Rajiv Dubey, Raj Kumar
openaire +2 more sources
High sensitivity of collimation testing equipment is desirable where collimated beams are used for precise and accurate measurements. Precision in the setting of collimation depends on the sensitivity of the testing equipment. In the present work, sensitivity to beam collimation of the recently reported holographic shearing interferometer (HSI) [J. Opt.
Rajiv Dubey, Raj Kumar
openaire +2 more sources
X-ray phase laminography with Talbot interferometer
SPIE Proceedings, 2010Laminography is a technique for 3D volume reconstruction, extending the classical tomography to the estimation of local areas in lamellar objects. We demonstrate X-ray phase laminography by using an X-ray Talbot interferometer consisting of two transmission gratings, which has been used only for X-ray phase tomography.
Sebastien Harasse +3 more
openaire +1 more source
Phase Tomography Using X-ray Talbot Interferometer
AIP Conference Proceedings, 2007A biological tomography result obtained with an X‐ray Talbot interferometer is reported. An X‐ray Talbot interferometer was constructed using an amplitude grating fabricated by X‐ray lithography at the LIGA beamline of NewSUBARU and gold electroplating. The pitch and pattern thickness of the grating were 8 μm and 30 μm, respectively. The effective area
A. Momose +6 more
openaire +1 more source