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Infrared Optical Properties of Thin CO, NO, CH4, HC1, N2O, O2, N2, Ar, and Air Cryofilms
| Content Provider | Semantic Scholar |
|---|---|
| Author | Roux, Jeffrey A. Wood, Bob E. Smith, Alexander M. Plyler, R. R. |
| Copyright Year | 1983 |
| Abstract | Abstract : The infrared spectral transmittance of cryofilms formed by CO, NO, CH4, HC1, N2O, O2, N2, Ar, and air were measured. These films were condensed on a 20 K germanium substrate and ranged in thickness from 0.25 to 15 micrometer; the deposition pressure for the films was 2 x 10 to the -7th power torr. Transmission spectra were obtained for the 500- to 3700/cm wavenumber range using a Fourier transform spectrometer. Values of complex index of refraction (n = n - ik) for the cryodeposits were derived from the experimental data using an analytical model and the nonlinear least-squares method. The analytical model treats the germanium as a thick noninterfering film and the deposit as a thin film. Results from the least-squares method are also compared with a Kramers-Kronig determination of the real part of the index of refraction. The optical properties (n,k) of such cryofilms are reqiured for predicting the degradation of contaminated, cryogenically cooled optical surfaces. |
| File Format | PDF HTM / HTML |
| DOI | 10.2514/6.1983-244 |
| Alternate Webpage(s) | http://www.dtic.mil/dtic/tr/fulltext/u2/a088269.pdf |
| Alternate Webpage(s) | https://doi.org/10.2514/6.1983-244 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
