Impact of dynamic solar panels on long exposure Fourier telescopy

Chandler, Susan M.; Lukesh, Gordon W.; Long, Steven M.

doi:10.1117/12.462453

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Holmes described the technique of Fourier telescopy in detail 10 . Nowadays much of the analysis has been performed on Fourier telescopy [11][12][13][14][15][16] . In this technique, an object is illuminated by several laser apertures, and the interference fringes modulated the object reflectivity.…”

Section: Background and Development Of Fourier Telescopymentioning

confidence: 99%

High-resolution imaging techniques based on optical synthetic aperture

Wang

Rao

Jiang

et al. 2007

3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

View full text Add to dashboard Cite

The quest for higher angular resolution in astronomy will inevitably require the telescope with large aperture. However, the diameter of primary mirror is limited by the fabrication problems as well as the scaling laws of manufacturing costs. Optical synthetic aperture telescopes represent a promising new technology to overcome the above-mentioned problems. Three incoherent imaging techniques based on optical synthetic aperture including Fourier telescopy, Michelson interferometer and Fizeau interferometer are described in the paper. Fourier telescopy is an active imaging technique combined with the advantages of synthetic aperture measurement. Michelson interferometers measure spatial Fourier transform of objects, while Fizeau interferometers produce direct images with full instant frequency coverage. We give an overview of the basic aspects and the differences of these techniques.

show abstract

Section: Background and Development Of Fourier Telescopymentioning

confidence: 99%

High-resolution imaging techniques based on optical synthetic aperture

Wang

Rao

Jiang

et al. 2007

3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

View full text Add to dashboard Cite

show abstract

“…The forerunner work that regards the FT technique as a test method for distant range weak targets has been firstly completed by Holmes [1][2][3][4] . With the FT theory and key technology researched in the industry and academic circles, research institutions in America set out relevant project plans of spatial weak targets monitoring, and formed a GLINT (GEO Light Imaging National Tested) imaging system used to realize imaging of distant range weak targets [5][6][7][8] in 1999.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of uncompleted frequency spectrum images based on Fourier telescopy

Mei-ling

Yang

2009

SPIE Proceedings

View full text Add to dashboard Cite

Fourier Telescopy (FT), an active laser imaging technique, is a good choice for high resolution imaging systems, which can be used to obtain satellite images from geosynchronous orbit targets. These images maybe lose part of frequency spectrum due to the limitation of the separation of the transmitter apertures (STA) and antenna array arrangements, etc.In this paper, the impact on image reconstruction of active laser imaging technique owing to the uncompleted degree of spectrum is mainly discussed. First, the FT imaging theory and frequency sampling technology are introduced. Then, the basic principle of image reconstruction is analyzed. The defective high frequency spectrum which is caused by the limitation of STA is replaced by zero (zero padding method for short). And the spectrum defective degree is approximately treated as the results of original target images passing through an ideal low-pass filter. Finally, the image reconstruction program is designed and the uncompleted frequency spectrum images are simulated with the method of zero padding. Simulation results show that images begin to become blurring when the cutoff frequency of the ideal low-pass filter is 10% lower than the width of the after padding original images.

show abstract

Field experiment and image reconstruction using a Fourier telescopy imaging system over a 600-m-long horizontal path

Liu

et al. 2016

Appl. Opt.

View full text Add to dashboard Cite

To confirm the effect of uplink atmospheric turbulence on Fourier telescopy (FT), we designed a system for far-field imaging, utilizing a T-type laser transmitting configuration with commercially available hardware, except for a green imaging laser. The horizontal light transmission distance for both uplink and downlink was ∼300 m. For both the transmitting and received beams, the height upon the ground was below 1 m. The imaging laser's pointing accuracy was ∼9.3 μrad. A novel image reconstruction approach was proposed, yielding significantly improved quality and Strehl ratio of reconstructed images. From the reconstruction result, we observed that the tip/tilt aberration is tolerated by the FT system even for Changchun's atmospheric coherence length parameter (r0) below 3 cm. The resolution of the reconstructed images was ∼0.615 μrad.

show abstract

Impact of dynamic solar panels on long exposure Fourier telescopy

Cited by 3 publications

References 0 publications

High-resolution imaging techniques based on optical synthetic aperture

High-resolution imaging techniques based on optical synthetic aperture

Reconstruction of uncompleted frequency spectrum images based on Fourier telescopy

Field experiment and image reconstruction using a Fourier telescopy imaging system over a 600-m-long horizontal path

Contact Info

Product

Resources

About