The Index of Refraction of Air in the Photographic Infrared

The index of refraction of dry CO2-free air has been measured in the region 6500 A. to 11200 A. With 55 measurements at 30 wavelengths the following dispersion curve at standard conditions was calculated by the method of least squares: (no-1),107 = 2878.94 ± 3.8 + 24.74 ± 4.5/λ2 - 2.47 ± 1.3/λ4 The curve can be extrapolated further into the infrared, but not into the visible. Comparison with other observers indicates that the present results are higher than the others by 6 to 10 parts in 107.

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Publication Details

Journal
CaltechTHESIS (California Institute of Technology)
Published
2024-12-10
DOI
https://doi.org/10.7907/v8qt-yp20
Primary Topic
Infrared Target Detection Methodologies
Type
article
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article

The Index of Refraction of Air in the Photographic Infrared

D. F. Bender
CaltechTHESIS (California Institute of Technology)
Infrared Target Detection Methodologies
article

The Index of Refraction of Air in the Photographic Infrared

D. F. Bender
article en

Abstract

The index of refraction of dry CO2-free air has been measured in the region 6500 A. to 11200 A. With 55 measurements at 30 wavelengths the following dispersion curve at standard conditions was calculated by the method of least squares: (no-1),107 = 2878.94 ± 3.8 + 24.74 ± 4.5/λ2 - 2.47 ± 1.3/λ4 The curve can be extrapolated further into the infrared, but not into the visible. Comparison with other observers indicates that the present results are higher than the others by 6 to 10 parts in 107.

CaltechTHESIS (California Institute of Technology)
California Institute of Technology (US)
Openalex Percentile: Top 100%
Infrared Target Detection Methodologies
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The Index of Refraction of Air in the Photographic Infrared — D. F. Bender · CaltechTHESIS (California Institute of Technology) (2024) | TGRS Research Map | TGRS