Results 291 to 300 of about 610,136 (345)
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Applied Optics, 1976
Active imaging experiments are described in the 300 microm-l mm-region of the far infrared (FIR) spectrum. Transmission data are presented for a wide variety of common materials indicating the range of applicability of FIR imaging to law enforcement or nondestructive testing.
T S, Hartwick +3 more
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Active imaging experiments are described in the 300 microm-l mm-region of the far infrared (FIR) spectrum. Transmission data are presented for a wide variety of common materials indicating the range of applicability of FIR imaging to law enforcement or nondestructive testing.
T S, Hartwick +3 more
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Far-infrared Fizeau interferometry
Applied Optics, 2001We present an interferometry using a far-infrared light as a tool for surface topography measurement of rough reflective surfaces. The method is based on the optical configuration of classical Fizeau interferometry, but we achieve roughness tolerance by using a long-wavelength infrared light (lambda = 10.6 mum). The method is called far-infrared Fizeau
K, Verma, B, Han
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Applied Optics, 1970
A moderate resolution vacuum far in spectrometer has been built with a data acquisition system designed for computer processing of the data. The spectral range of the instrument is 20-1600 micro. Sensitive low temperature bolometer detectors have been made of doubly doped silicon. The radiation filtering scheme is discussed in detail.
I F, Silvera, G, Birnbaum
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A moderate resolution vacuum far in spectrometer has been built with a data acquisition system designed for computer processing of the data. The spectral range of the instrument is 20-1600 micro. Sensitive low temperature bolometer detectors have been made of doubly doped silicon. The radiation filtering scheme is discussed in detail.
I F, Silvera, G, Birnbaum
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Far Infrared Airborne Spectroscopy
Applied Optics, 1970Equipment and techniques employed in an airborne far ir (80-400 micro) spectral measurement of the solar brightness temperature are described, with particular attention paid to the scanning Michelson interferometer and the radiometric calibration. The airborne performance of several telescopic guiding systems, a liquid helium cooled bolometer, and ...
J A, Eddy +3 more
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Far Infrared Interference Filters
Applied Optics, 1969Capacitive meshes for far ir, low pass filters are prepared from Cu layers on 2.5 micro plastic film. The properties of these meshes of different mesh constants g with their different combinations in two-mesh, fourmesh, and eight-mesh filters are studied in the spectral region 160 cm(-1) to 10 cm(-1) by the use of a grating spectrometer.
S P, Varma, K D, Möller
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SPIE Proceedings, 1990
The SAFIRE (Spectroscopy of the Atmosphere using Far-Infrared Emission) spaceborne instrument is discussed. The aim of SAFIRE is to improve understanding of the ozone distribution in the middle atmosphere by conducting global scale measurements of the important chemical, radiative, and dynamical processes which influence it changes.
Jean Leotin, Claude Meny
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The SAFIRE (Spectroscopy of the Atmosphere using Far-Infrared Emission) spaceborne instrument is discussed. The aim of SAFIRE is to improve understanding of the ozone distribution in the middle atmosphere by conducting global scale measurements of the important chemical, radiative, and dynamical processes which influence it changes.
Jean Leotin, Claude Meny
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Review of Scientific Instruments, 1993
A far-infrared rotating-analyzer ellipsometer which uses a step-tunable, optically pumped gas laser as its light source is described herein. As polarizers novel metal grids with 10 000:1 polarization contrast were used. The instrument determines the complex dielectric function in the spectral range between 10 and 150 cm−1.
K.-L. Barth, F. Keilmann
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A far-infrared rotating-analyzer ellipsometer which uses a step-tunable, optically pumped gas laser as its light source is described herein. As polarizers novel metal grids with 10 000:1 polarization contrast were used. The instrument determines the complex dielectric function in the spectral range between 10 and 150 cm−1.
K.-L. Barth, F. Keilmann
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FAR-INFRARED AND SUPERCONDUCTIVITY
Infrared Physics, 1976Abstract A review of the electrodynamics of superconductors is presented, neglecting questions related to the Josephson-effect. Following a historical introduction, the experimental techniques are sketched. A more detailed analysis of the high-frequency electrodynamics of metals is given, and the influence of temperature, strong-coupling effects ...
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Physics Today, 1970
The far infrared is that uncomfortable region of the electromagnetic spectrum falling between 50 and 1000 microns (200 to 10 cm−1) where conventional infrared methods cease to be efficient while microwave techniques cannot yet be applied in a straightforward way.
Walter G. Rothschild, Karl D. Möller
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The far infrared is that uncomfortable region of the electromagnetic spectrum falling between 50 and 1000 microns (200 to 10 cm−1) where conventional infrared methods cease to be efficient while microwave techniques cannot yet be applied in a straightforward way.
Walter G. Rothschild, Karl D. Möller
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