Radiant energy – Infrared-to-visible imaging
Patent
1989-02-09
1991-12-10
Hannaher, Constantine
Radiant energy
Infrared-to-visible imaging
250331, G01J 500, G01J 558
Patent
active
050721208
ABSTRACT:
An electromagnetic imager device can detect electromagnetic images, for example, in the infrared, millimeter and microwave wavelengths and convert these images into useful wavelengths which imaging devices, such as a camera, can record. The electromagnetic imager includes an interferometer having one arm thereof filled with a gaseous mixture. The particular gaseous mixture used, improves the accuracy of the device by enhancing the probability of an exchange of kinetic energy for molecular internal energy during molecular collision. The electromagnetic image is absorbed in an internal mode of the molecular species in the gas over an absorption depth. The absorption of the electromagnetic energy causes heating in the gas which, in turn, causes local changes in the index of refraction in the focal plane of the gas. These changes in the index of refraction phase modulate the phase front of the laser beam passing through the gas. The local index of refraction variations thus result in a direct mapping of the absorbed electromagnetic energy image allowing the image to be detected by interferometric means.
REFERENCES:
patent: 3479510 (1969-11-01), Baumberger et al.
patent: 3748471 (1973-07-01), Ross et al.
patent: 4262198 (1981-04-01), Gupta et al.
patent: 4275302 (1981-06-01), Imbert et al.
patent: 4306150 (1981-12-01), Dietz
patent: 4468136 (1984-08-01), Murphy et al.
patent: 4634870 (1987-01-01), Metcalf
patent: 4666296 (1987-05-01), Bailly-Salins
patent: 4788428 (1988-11-01), Metcalf et al.
Christopher C. Davis and Samuel J. Petuchowski, "A New Thermal Radiation Detector Using Optical Heterodyne Detection of Absorbed Energy", Infrared Physics, vol. 23, No. 4 (1983) pp. 177-182; Pergamon Press Ltd.
Christopher C. Davis and Samuel J. Petuchowski, "Phase fluctuation optical heterodyne spectroscopy of gases", Applied Optics, vol. 20, No. 14 (Jul. 15, 1981) pp. 2539-2554; .COPYRGT.1981 Optical Society of America.
A. G. Rokakh, A. S. Oleinik, L. D. Zorina, V. I. Davydov, B. P. Zakharchenya and F. A. Chudnovskii, "Infrared visualizer using a CdSe-FTIROS structure", Sov. Tech. Phys. Lett., vol. 5, No. 11 (Nov. 1979) [Copyright .COPYRGT.1980 American Institute of Physics].
Hannaher Constantine
Holt William H.
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