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Fully automated low-cost setup for fringe projection profilometry

Uriel Rivera-Ortega, Joris Dirckx & Cruz Meneses-Fabian
In this paper an alternative low-cost, easy-to-use, and fully automated profilometry setup is proposed. The setup is based on a phase-shifting fringe projection technique with four projected fringe parameters. It uses the well-known triangulation arrangement and low-cost electronic and image acquisition components such as a data acquisition board, a motor controller board, a printer rail, a CMOS webcam, and an LCD projector. The position of the camera, the generation of the fringe pattern, the acquisition...

Fully automated low-cost setup for fringe projection profilometry

Uriel Rivera-Ortega, Joris Dirckx & Cruz Meneses-Fabian
In this paper an alternative low-cost, easy-to-use, and fully automated profilometry setup is proposed. The setup is based on a phase-shifting fringe projection technique with four projected fringe parameters. It uses the well-known triangulation arrangement and low-cost electronic and image acquisition components such as a data acquisition board, a motor controller board, a printer rail, a CMOS webcam, and an LCD projector. The position of the camera, the generation of the fringe pattern, the acquisition...

Media 1: Fully automated low-cost setup for fringe projection profilometry

Uriel Rivera-Ortega, Joris Dirckx & Cruz Meneses-Fabian
Originally published in Applied Optics on 20 February 2015 (ao-54-6-1350)

Media 1: Fully automated low-cost setup for fringe projection profilometry

Uriel Rivera-Ortega, Joris Dirckx & Cruz Meneses-Fabian
Originally published in Applied Optics on 20 February 2015 (ao-54-6-1350)

Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Preformed plasma channels with parabolic radial density profiles enable the extended and stable optical guiding of high-intensity laser pulses. High-voltage discharge capillaries, commonly used for channel formation, have limited guiding length and opaque walls, complicating the diagnosis of the plasma within. This paper proposes a free-space gas channel produced by the collision of several gas flows. The collision of the gas flows forms an on-axis density depression surrounded by higher density walls. By offsetting the...

Visualization 3: Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Animation for Fig. 4. Originally published in Applied Optics on 01 November 2015 (ao-54-31-F144)

Visualization 3: Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Animation for Fig. 4. Originally published in Applied Optics on 01 November 2015 (ao-54-31-F144)

Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Preformed plasma channels with parabolic radial density profiles enable the extended and stable optical guiding of high-intensity laser pulses. High-voltage discharge capillaries, commonly used for channel formation, have limited guiding length and opaque walls, complicating the diagnosis of the plasma within. This paper proposes a free-space gas channel produced by the collision of several gas flows. The collision of the gas flows forms an on-axis density depression surrounded by higher density walls. By offsetting the...

Visualization 2: Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Animation for Fig. 3. Originally published in Applied Optics on 01 November 2015 (ao-54-31-F144)

Visualization 2: Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Animation for Fig. 3. Originally published in Applied Optics on 01 November 2015 (ao-54-31-F144)

Visualization 1: Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Animation for Fig. 2. Originally published in Applied Optics on 01 November 2015 (ao-54-31-F144)

Visualization 1: Simulation of free-space optical guiding structure based on colliding gas flows

D. Kaganovich, J. P. Palastro, Y.-H. Chen, D. F. Gordon, M. H. Helle & A. Ting
Animation for Fig. 2. Originally published in Applied Optics on 01 November 2015 (ao-54-31-F144)

Visualization 1: Intensity distribution of the parhelic circle and embedded parhelia at zero solar elevation: theory and experiments

Sarah Borchardt & Markus Selmke
Map of considered ray paths Originally published in Applied Optics on 01 August 2015 (ao-54-22-6608)

Visualization 1: Intensity distribution of the parhelic circle and embedded parhelia at zero solar elevation: theory and experiments

Sarah Borchardt & Markus Selmke
Map of considered ray paths Originally published in Applied Optics on 01 August 2015 (ao-54-22-6608)

Intensity distribution of the parhelic circle and embedded parhelia at zero solar elevation: theory and experiments

Sarah Borchardt & Markus Selmke
We describe the individual contributions to the intensity distribution of the parhelic circle for plate-oriented hexagonal crystals at exactly zero solar elevation using geometrical optics. An experimental as well as theoretical study of in-plane ray paths provides details on the mechanism for several halos, including the parhelia, the 120° and 90° parhelia, a blue edge, and the Liljequist parhelia. Azimuthal coordinates for associated characteristic features in the intensity distribution are compared with experimental data obtained...

Intensity distribution of the parhelic circle and embedded parhelia at zero solar elevation: theory and experiments

Sarah Borchardt & Markus Selmke
We describe the individual contributions to the intensity distribution of the parhelic circle for plate-oriented hexagonal crystals at exactly zero solar elevation using geometrical optics. An experimental as well as theoretical study of in-plane ray paths provides details on the mechanism for several halos, including the parhelia, the 120° and 90° parhelia, a blue edge, and the Liljequist parhelia. Azimuthal coordinates for associated characteristic features in the intensity distribution are compared with experimental data obtained...

Visualization 5: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 6 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

Visualization 5: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 6 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
In a recent study we reported on the gradient index (GRIN) lens Stokes polarimeter (GLP) [Opt. Lett.39, 2656 (2014)10.1364/OL.39.002656OPLEDP0146-9592]. With a simple architecture, this polarimeter can measure the state of polarization in a single shot. In this article, we present further studies for improving the performance of the GLP. Detailed discussions are presented on the optimization process of the GLP based on different choices of data from the CCD images. It is pointed out that...

Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
In a recent study we reported on the gradient index (GRIN) lens Stokes polarimeter (GLP) [Opt. Lett.39, 2656 (2014)10.1364/OL.39.002656OPLEDP0146-9592]. With a simple architecture, this polarimeter can measure the state of polarization in a single shot. In this article, we present further studies for improving the performance of the GLP. Detailed discussions are presented on the optimization process of the GLP based on different choices of data from the CCD images. It is pointed out that...

Visualization 4: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 5 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

Visualization 4: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 5 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

Visualization 3: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 4 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

Visualization 3: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 4 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

Visualization 2: Optimization of GRIN lens Stokes polarimeter

Jintao Chang, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao & Hui Ma
The light intensity patterns on the CCD for row 3 Originally published in Applied Optics on 20 August 2015 (ao-54-24-7424)

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