Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Joseph P. Estrera"'
Autor:
Joseph P. Estrera, Robert Glosser, Abdul Basit A Saleh, Jana Julien, Timothy E. Ostromek, Mary Rector
Publikováno v:
Physica Scripta. 64:386-389
The photoreflectance (PR) spectra of MOCVD grown Zn:AlxGa1-xAs with 0 < x < 0.55 and carrier concentration, N, of ~ 5 × 1017 to ~ 1 × 1019 cm-3 was studied at the E1 transition energy. Of particular interest was the effect of varying N and x on E1,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbd596c84120ac9ab7a0591ed17e23b3
https://doi.org/10.1238/physica.regular.064a00386
https://doi.org/10.1238/physica.regular.064a00386
Publikováno v:
SPIE Proceedings.
The output brightness temporal response of non-gated image intensifying systems was examined. Generation III gallium arsenide image intensifiers (image tubes) using the P43 and P20 phosphors were tested for image persistence, minimum event detection,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b8b5a4b5f04ce0e2ed2c94be2d57214
https://doi.org/10.1117/12.851077
https://doi.org/10.1117/12.851077
Autor:
Joseph P. Estrera, J. W. Glesener
Publikováno v:
SPIE Proceedings.
Image intensifiers (I2) have many advantages as detectors. They offer single photon sensitivity in an imaging format, they're light in weight and analog I2 systems can operate for hours on a single AA battery. Their light output is such as to exploit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::974e3a891aff6e4d0857e0ad98b772b5
https://doi.org/10.1117/12.845816
https://doi.org/10.1117/12.845816
Autor:
Joseph P. Estrera
Publikováno v:
SPIE Proceedings.
This paper presents a comparative analysis of pixel resolution of standard digital imaging formats to the imaging output of a Generation III image intensifier. The comparative analysis will focus on the application of recognition of a man size target
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3c89289ebcd62cc1c1381d37c5d56e4
https://doi.org/10.1117/12.816452
https://doi.org/10.1117/12.816452
Autor:
Joseph P. Estrera
Publikováno v:
SPIE Proceedings.
This paper presents a revisit of the traditional measurement of limiting resolution using tri-bar patterns of various digital imaging and image intensifier (I 2 ) systems. Utilizing digital recording of target tri-bar images combined with modern imag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::901f0858afe3f647fdceec18de35d7da
https://doi.org/10.1117/12.817056
https://doi.org/10.1117/12.817056
Autor:
Joseph P. Estrera
Publikováno v:
SPIE Proceedings.
This paper presents analysis of digital images from single and dual sensor systems of man and vehicle size targets at low light conditions (at or below starlight conditions, 10-4 foot candles). More specifically, the image analysis will focus on meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4a75d454ddace8275e881f96adbf2f3
https://doi.org/10.1117/12.817057
https://doi.org/10.1117/12.817057
Autor:
Joseph P. Estrera
Publikováno v:
SPIE Proceedings.
This paper presents digital image fusion (enhanced A+B) systems in color imaging and low light target applications. This paper will discuss first the digital sensors that are utilized in the noted image fusion applications which is a 1900x1086 (high
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67f2f1cf92dc31722d3e3cd310c02744
https://doi.org/10.1117/12.816283
https://doi.org/10.1117/12.816283
Publikováno v:
SPIE Proceedings.
Northrop Grumman Electro-Optical Systems (NGEOS) has concentrated in recent years on the development ofadvanced night vision goggle (NVG) systems. These NVGs developments concentrate on past operational deficienciessuch as high light/bright source im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d69d9813a4332bbbe19b4ba9ce164bce
https://doi.org/10.1117/12.486380
https://doi.org/10.1117/12.486380
Autor:
Michael R. Saldana, Joseph P. Estrera
Publikováno v:
SPIE Proceedings.
Generation III image intensifiers, employing gallium arsenide (GaAs)photocathodes, enable high speed gating into sub-nanosecond range. By utilizing high speed gating techniques, a number of important applications are realized in military rugged groun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::955b6afdf26bcab1ad98ffef14f0b608
https://doi.org/10.1117/12.487589
https://doi.org/10.1117/12.487589
Autor:
Joseph P. Estrera, Wayne Isbell
Publikováno v:
SPIE Proceedings.
The United States' armed forces continue to be presented with increased challenges in adverse operational environments with increasing risk and complexity - especially at night. To ensure continued operational success and battlefield superiority duri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a073c01db58c4b0edda0976230e955e3
https://doi.org/10.1117/12.487694
https://doi.org/10.1117/12.487694