Static wide field real time multi-direction detecting polarization wind imaging interferometer

Abstract

The invention relates to a static wide field real-time multidirectional detecting polarization wind imaging interferometer, which consists of a polarizer, a polarization beam splitter, total reflection mirrors, a wide field glass, a lambda / 4 wave board, a tetrahedral pyramid prism, an imaging mirror, a quarter zone analyzer and a quarter zone CCD. The polarizer is arranged in the direction of a primary optical axis, the beam splitter is positioned behind the polarizer, a polarization beam splitting film of the beam splitter is arranged at an angle of 45 degrees with the direction of the primary optical axis, two total reflection mirrors are positioned behind the wide field glass and are arranged in the directions of reflected light and transmitted light of the polarization beam splitter respectively, and the lambda / 4 wave board is arranged in the front of the reflection mirror; the lambda / 4 wave board, the tetrahedral pyramid prism, the imaging mirror, the quarter zone analyzer and the quarter zone CCD are arranged in the direction of emergent light of the beam splitter respectively; and four polarization zone phases of the quarter zone analyzer differ by phi / 4 in turn. Compared with the prior art, the interferometer has the remarkable characteristics of static state (no moving component), wide field, achromatic aberration and temperature difference removal, and can achieve simultaneous, real-time and multidirectional omnidirectional detection of four strengths for a high atmosphere wind field interference figure.

Description

technical field [0001] The content of the present invention belongs to the interdisciplinary technical field of optical remote sensing instruments, computer image processing, precision machinery, etc., and relates to a passive remote sensing detection method for the velocity field, temperature field, pressure field and particle radiation rate of the upper atmosphere (80-300 km). s installation. Background technique [0002] International basic research on passive detection of the upper atmosphere began in the middle of the 20th century. At first, it conducted long-term and in-depth discussions on the generation mechanism of the detected source—airglow or aurora, Doppler frequency shift and broadening of spectral lines, temperature in the atmospheric radiation zone, and thermodynamic characteristics; since the 1980s , the field has successively begun to use the interferogram of the two main spectral lines of the aurora (the green line at 557.7nm and the red line at 630.0nm) ...

AI Technical Summary

Problems solved by technology

In recent years, scientists in the United States, Canada, and France have begun to develop a device for detecting wind fields in the near-infrared and mid-infrared regions—the Stratospheric Wind Field Transport Interferometer (SWIFT), which is expected to be launched in 2010 and conduct detection tests. , people also consider the application of this device in the ultraviolet and thermal infrared regions of interest, but there are many practical challenges involved

[0004] At present, the wind imaging interferometers developed internationally, such as WINDII, SWIFT, ERWIN, etc., all adopt the moving mirror scanning method. During the detection, the moving mirror needs to be stepped four times to collect four interference intensity values ​​of the same target at different times. During this process, the wind field has changed, but the wind field is approximately considered to be unchanged in the measurement, so the measurement error is relatively large; The stability and measurement results are extremely unsuitable for aerospace and aviation remote sensing detection

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