Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Don M. Cottrell"'
Autor:
Ignacio Moreno, Jeffrey A. Davis, Katherine Badham, María M. Sánchez-López, Joseph E. Holland, Don M. Cottrell
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
Abstract We present a proof of concept for a vector beam polarization state spectrum analyzer based on the combination of a polarization diffraction grating (PDG) and an encoded harmonic q-plate grating (QPG). As a result, a two-dimensional polarizat
Externí odkaz:
https://doaj.org/article/9d94de0e41a9408c91a4e7d0c40004fe
Publikováno v:
Applied Sciences, Vol 8, Iss 6, p 1006 (2018)
In this work we present an experimental proof of concept of a programmable optical zoom lens system with no moving parts that can form images with both positive and negative magnifications. Our system uses two programmable liquid crystal spatial ligh
Externí odkaz:
https://doaj.org/article/944dd051b8c54fd1ba683a97764f9d0e
Publikováno v:
Optical Engineering. 62
Publikováno v:
Journal of the European Optical Society-Rapid Publications. 17
In this work we provide a simple experimental method to measure and evaluate the pixel crosstalk in phase-only liquid-crystal displays caused by the fringing field effect. The technique is a reverse engineering method that does not require informatio
Autor:
María del Mar Sánchez-López, Don M. Cottrell, Benjamin K. Gutierrez, Ignacio Moreno Soriano, Jeffrey A. Davis
Publikováno v:
Optics and Photonics for Information Processing XV.
In this work we present a new method to optically obtain the convolution / correlation between two functions. The technique is based on obtaining higher powers of a properly designed phase-only hologram. The approach combines some of the advantages o
Autor:
Jeffrey A. Davis, María del Mar Sánchez-López, Don M. Cottrell, Ignacio Moreno, Benjamin K. Gutierrez
Publikováno v:
Journal of the Optical Society of America. A, Optics, image science, and vision. 37(9)
When encoding diffractive lenses onto a spatial light modulator (SLM), there is a Nyquist limit to the smallest focal length that can be formed. When this limit is surpassed, a two-dimensional array of lenslets is formed. There have been very few dis
Publikováno v:
Advances in Display Technologies X.
In standard phase spatial light modulators (SLM), showing a phase modulation of 2π radians, there is a limit to the shortest focal length of an encoded lens. This Nyquist focal length limit is caused by the aliasing originated by the SLM pixelated s
Autor:
Don M. Cottrell, María del Mar Sánchez-López, Jeffrey A. Davis, Ignacio Moreno, Benjamin K. Gutierrez
Publikováno v:
Optics and Lasers in Engineering. 146:106701
We present a new type of optical convolver / optical correlator capable of encoding higher orders. The technique is based on obtaining higher powers of a properly designed hologram. This can be obtained in two ways. First, we can recalculate higher o
Autor:
Jason P. Sorger, Don M. Cottrell, Jeffrey A. Davis, María del Mar Sánchez-López, Ignacio Moreno
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
We present a holographic projection system based on the encoding of computer-generated holograms onto a spatial light modulator. We show how the size, location, and polarization state of the output can be controlled electronically, without physically
Publikováno v:
OSA Continuum. 4:896
We reexamine a simple technique for encoding complex amplitude information onto a phase-only spatial light modulator (SLM). The basis for the approach is to spatially vary the diffraction efficiency of a two-dimensional checkerboard binary phase diff