Zobrazeno 1 - 10
of 542
pro vyhledávání: '"77"'
Publikováno v:
Passive and Active Millimeter-Wave Imaging XXI.
First responders have the dangerous task of responding to emergency situations in firefighting scenarios involving homes and offices. The importance of the 77GHz radar and IR camera working together are their ability to see through walls and into adj
Autor:
Philippe Tribolet, Alain Manissadjian, Xavier Marcadet, Philippe Bois, Eric Herniou, Eric Costard
Publikováno v:
Infrared Technology and Applications XXVII.
Standard GaAs/AlGaAs QWIPs are now well established for LWIR detection. The main advantage of this technology is the duality with the technology of commercial GaAs devices. The realization of large FPAs (up to 640 X 480) drawing on the standard III-V
Publikováno v:
SPIE Proceedings.
A 256 by 256 IRCMOS array with a 35 micrometer pitch operating in the (3 - 5) micrometer wavelength range at 77 K has been developed at LETI/LIR. The readout circuit was designed and processed with a 1.2 micrometer design rules standard CMOS technolo
Publikováno v:
Physics and Simulation of Optoelectronic Devices VII.
3D numerical simulation of intracavity-contacted oxide-confined VCSELs operating at cryogenic temperatures is reported. Spatial profiles and 3D distributions of electrical potential, current and ture are calculated. The device geometry is found to ca
Publikováno v:
SPIE Proceedings.
Recent advances in material science have lead to the development of new, very low temperature actuators of Terbium and Dysoprosium with hitherto unavailable stroke, energy efficiency and force. The test instrument described here was developed to inve
Publikováno v:
SPIE Proceedings.
An ultra-low dark current normal incidence p-type strained-layer In0.3Ga0.7As/In0.52Al0.48As quantum well IR photodetector (PSL-QWIP) grown on semi-insulating (100) InP substrate by MBE technique has been demonstrated for the first time. This PSL-QWI
Publikováno v:
Cryogenic Optical Systems and Instruments IV.
A 50 cm diameter, lightweight, Amersil TO8E, fused-natural-quartz mirror with a single arch cross section was tested at the NASA/Ames Research Center Cryogenic Optics Test Facility to measure cryogenic distortion and hysteresis. The mirror was cooled
Autor:
Sergey I. Tarapov, Ilary M. Rarenko, Igor Ivanchenko, Nikolai N. Beletskii, I. N. Gorbatyuk, Nina Popenko, Alexey A. Vertiy
Publikováno v:
SPIE Proceedings.
Excitation of surface magnetoplasma waves in the CdHg1Te semiconductors has been effected by the method of disturbed total internal reflection following the Otto scheme at the wavelength of 2 mm, in the temperature range 0.3 KT
Publikováno v:
SPIE Proceedings.
The responsivities of Si, Ge, and InSb photodiodes at 77 K are measured and compared. The results are used to determine the wavelength at which a change should occur in the detector materials used in the focal plan of the Mars Observer Visual and IR
Autor:
Christian Vigneron
Publikováno v:
SPIE Proceedings.
The fundamental characteristics of analytical stereoplotters compared to the analog stereoplotters is their facility to use them and the versatility given by the on-line of a mini-computer. Analog stereoplotters, even those classified universal, are