Interference image spectroscopy for upper atmospheric wind field measurement

Earth and Space: From Infrared to Terahertz (ESIT 2022)

Zhang²,

He³

2023

The operating principle of the static Martian wind imaging Michelson Interferometer (MWIMI) developed by our research group is discussed in this paper, and the errors caused by the core components of the interferometer are analyzed, including the tilt of the quadrangle fixed mirror, surface heterogeneity and reflectivity errors. This work mainly studies the influence of error on the measurement of wind speed and temperature, and the error curve is obtained by computer simulation. The limit of tilt angle, surface accuracy and reflectivity of the four-quadrant fixed mirror can be obtained from this curve. Ultimately, the accuracy of the MWIMI instrument is discussed according to the actual design parameters, which verifies the high measurement accuracy of the instrument. This study lays a theoretical foundation for the design, development and engineering of a new type of wind imaging interferometer, and provides a reference for the study of Mars atmosphere, which is of great significance for the climate change, environmental detection and space exploration of Mars.

Section: Simulation Analysis 41 Influence Of Tilt On Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the four-quadrant fixed mirror on the temperature and wind velocity inversion for the near-infrared static Mars wind imaging interferometer

Earth and Space: From Infrared to Terahertz (ESIT 2022)

Zhang²,

He³

2023

“…In order to overcome these drawbacks, static systems have been developed, such as the Sagnac interference imaging spectrometer and the polarization interference imaging spectrometer [4,5]. These devices are known as the spatially modulated interference imaging spectrometer (SMIIS).…”

Section: Introductionmentioning

confidence: 99%

Modulation transfer function of a modified spatially modulated imaging interferometer

Journal of Modern Optics

Gao

et al. 2013

Self Cite

The modulation transfer function (MTF) is one of the main criteria for judging the image quality of an imaging system. Together with the well-known optical transfer function, the MTF can be regarded as an objective basis reflecting the comprehensive performance of an imaging interferometer. In order to improve the imaging quality of a modified spatially modulated imaging interferometer (MSMII) with large optical path difference, the boundary conditions of an incident ray, at full field of view, along the x and y directions, respectively, are first calculated by the method of prism expansion, and then the exact expression of the pupil function of the MSMII is given. The two-dimensional MTF of the MSMII is obtained by the Fourier transform. Compared with previous studies, this work gives the two-dimensional MTF for the MSMII, and analyzes the effects of various parameters on the MTF. The optimal values of the incident angle i together with the acute angels b 1 and b 2 are chosen as i ¼ 0 and b 1 ¼ b 2 ¼ 45 , respectively. If so, a high MTF is obtained, i.e. the imaging quality of the MSMII can satisfy the need of detecting upper atmospheric wind fields.

“…Passive detection of the upper atmospheric wind field by interference imaging spectroscopy is based on the Doppler effect of electromagnetic waves [1][2][3][4][5][6][7][8][9][10][11][12]. Since the 1980s, various wind imaging interferometers (WINDIIs) have been studied, such as the wide-angle Michelson Doppler imaging interferometer [4], WINDII [5], the stratospheric wind interferometer for transport studies [6], an E-region wind interferometer [7], the dynamics atmosphere Mars observer [8], the polarizing atmospheric Michelson interferometer (PAMI) [9], and the tempo-spatially modulated polarization atmosphere Michelson interferometer [10], etc.…”

Section: Introductionmentioning

confidence: 99%

Complete optical throughput analysis of the static polarization wind imaging interferometer

Wang

et al. 2013

Appl. Opt.

Self Cite

The basic principle of the static polarization wind imaging interferometer (SPWII) is expounded in this paper. By using trigonometric function and complex amplitude methods, the complex vibration amplitude of each polarization device with deviation from its ideal direction is calculated. The variations of the fringe visibility and optical throughput with deviation angles are given analytically and simulated numerically. According to the design parameters of the SPWII, the air-equivalent length L is equal to 16.14 cm and the total transmissivity is greater than 0.4. When the polarization directions of each polarization device are all in the ideal directions, the total optical throughput can be maintained at about 16.4% of the incident optical intensity. When the polarization directions of each polarization device are all 2° deviated from the ideal positions, the total optical throughput is decreased by 0.08%. This work would be useful for the realization and data processing of the SPWII.