Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Jack N. Cederquist"'
Publikováno v:
Applied optics. 28(13)
A design method is presented for computing the phase functions of an energy efficient system using two holographic elements for converting a Gaussian beam into a uniform beam with rectangular support in the far field of the source. The method is base
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b97d2eabd1ad359887c7302bf2c4287
https://pubmed.ncbi.nlm.nih.gov/20555573
https://pubmed.ncbi.nlm.nih.gov/20555573
Autor:
Jack N. Cederquist, Anthony M. Tai
Publikováno v:
Applied optics. 26(23)
In real-time speckle imaging and speckle interferometry, there is often the need to remove a nonuniform incoherent background from the detected image to enhance the embedded coherent speckle image. Previous approaches generally require the use of a r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::449e41003c4d5cab227fa599f9ef3704
https://pubmed.ncbi.nlm.nih.gov/20523494
https://pubmed.ncbi.nlm.nih.gov/20523494
Publikováno v:
Optics letters. 13(8)
Phase retrieval from experimental (laboratory) data has been successfully demonstrated. A diffuse object was coherently illuminated and Fourier intensity data were collected by a charge-coupled device detector and a video digitizer. By using the data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da5af14625c81922ea6f72950609f14b
https://pubmed.ncbi.nlm.nih.gov/19745982
https://pubmed.ncbi.nlm.nih.gov/19745982
Autor:
Michael T. Eismann, Richard J. Bartell, James A. Nunez, Jack N. Cederquist, Craig R. Schwartz, Lee Curtis Sanders, Barry W. Lyons, Stephen D. Ingle, Alan H. Ratcliff
Publikováno v:
Algorithms for Multispectral, Hyperspectral, and Ultraspectral Imagery VI.
An end-to-end hyperspectral system model with applications to space and airborne sensor platforms is under development and testing. In this paper we discuss current work in the development of the sensor model and the results of preliminary testing. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::409dbdcf59357996c8625d3b401c2dea
https://doi.org/10.1117/12.410380
https://doi.org/10.1117/12.410380
Autor:
Robert Horvath, Kurt Montavon, Linnea S. Nooden, James A. Nunez, David R. Twede, John W. Salisbury, James A. Wright, Craig R. Schwartz, Arthur C. Kenton, Jack N. Cederquist
Publikováno v:
SPIE Proceedings.
The objective of the US Army Hyperspectral Mine Detection Phenomenology program was to determine if spectral discriminants exist that are useful for the detection of land mines. Statistically significant mine signature data were collected over a wide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fe179c32e72269bcd448ee774873c89
https://doi.org/10.1117/12.357010
https://doi.org/10.1117/12.357010
Publikováno v:
SPIE Proceedings.
IR spectral remote sensing has demonstrated much in the last few years including the potential for low contrast day/night military target detection. The status, needs, and challenges in the area of physics and phenomenology, sensors, and modeling are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::198a007d96675096ae17122bebfd3087
https://doi.org/10.1117/12.354503
https://doi.org/10.1117/12.354503
Publikováno v:
SPIE Proceedings.
IR spectral imagers are being considered for air to ground target detection applications. The targets can be detected not only by the exploitation of target to background color but also by the high spectral band to band correlation of many background
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47db0ac2c22f93a30949a5ec1a54b082
https://doi.org/10.1117/12.328094
https://doi.org/10.1117/12.328094
Autor:
Jack N. Cederquist, Craig R. Schwartz
Publikováno v:
SPIE Proceedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69d7030f641187224e2bd4b66285d73a
https://doi.org/10.1117/12.278936
https://doi.org/10.1117/12.278936
Publikováno v:
SPIE Proceedings.
Recent studies have demonstrated the potential for exploring spectral discriminates in the thermal infrared for day/night surveillance and targeting of military targets in situations where the thermal contrast is low. Although the spectral discrimina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86cb1c8fb8a884af7b020256a6a0b579
https://doi.org/10.1117/12.258056
https://doi.org/10.1117/12.258056
Publikováno v:
SPIE Proceedings.
Recent data collections using an infrared hyperspectral measurement system have provided a significant measurement database of military vehicles in vegetated and desert backgrounds. This paper summarizes the results of a study performed to assess the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e4c381cb0d240f7cedf416b29c57598
https://doi.org/10.1117/12.243007
https://doi.org/10.1117/12.243007