Influence of the AOTF rear cut angle on spectral image quality

被引：0

作者：

Xu Z. ^{[1
]}

Zhao H. ^{[1
,2
]}

Jia G. ^{[1
,2
]}

机构：

[1] School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing

[2] Key Laboratory of "Precision Opto-mechatronics Technology" Ministry of Education, Beihang University, Beijing

来源：

Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2022年 / 51卷 / 07期

关键词：

acousto-optic tunable filter; rear cut angle; spectral imaging;

D O I：

10.3788/IRLA20210590

中图分类号：

学科分类号：

摘要：

Spectral image degradation is a common problem of acousto-optic tunable filter (AOTF) imaging spectrometers, and it is difficult to quantitatively predict. To quantitatively evaluate the image quality of spectral images, a modulation transfer function (MTF) calculation method including the influence of the AOTF rear cut angle is proposed. In this method, the line spread function (LSF) of the AOTF device is obtained by establishing the spectrum-space dimension response model of the AOTF, and then the theoretical MTF is obtained by Fourier transform of the line spread function. In the validation experiment, the deviation between the measured MTF value and the theory is less than 15% within the cut-off frequency. It is a theoretical basis for image quality evaluation of the AOTF. Furthermore, the influence of different AOTF rear cut angles on spectral image quality is discussed by this quantitative method. After simulation, it is concluded that the rear cut angle of the AOTF has difficulty meeting the requirements of lateral chromatic aberration and image sharpness at the same time. The cut angle needs to be selected according to the requirements of practical application. Therefore, it is significant to evaluate the image quality of AOTFs with different rear cut angles. The method is an important theoretical basis for AOTF device design. © 2022 Chinese Society of Astronautics. All rights reserved.

引用

共 22 条

[1]

Tang Shaofan, Lu Zhijun, Wang Weigang, Et al., Brief description of space hyperspectral imager (invited), Infrared and Laser Engineering, 48, 3, (2019)

[2]

Zhang Rui, Xie Kunyang, Jing Ning, Et al., Technology of hyperspectral full polarization imaging based on superachromatic 1/4 wave plate and acousto-optic tunable filter, Infrared and Laser Engineering, 48, 8, (2019)

[3]

Batshev V, Machikhin A, Martynov G., Et al., Polarizer-free AOTF-based SWIR hyperspectral imaging for biomedical applications, Sensors, 20, 16, (2020)

[4]

Korablev O, Ivanov A, Fedorova A, Et al., Development of a mast or robotic arm-mounted infrared AOTF spectrometer for surface Moon and Mars probes, Proceedings of SPIE, 9608, (2015)

[5]

Wu Changkun, Zhang Wei, Hao Yazhe, Design of a control system for a visible/near-infrared real-time imaging spectrometer, Chinese Optics, 15, 2, pp. 348-354, (2022)

[6]

Chang I C., Noncollinear acousto-optic filter with large angular aperture, Applied Physics Letters, 25, 7, pp. 370-372, (1974)

[7]

Yano T, Watanabe A., Acousto-optic TeO<sub>2</sub> tunable filter using far-off-axis anisotropic bragg diffraction, Applied Optics, 15, 9, pp. 2250-2258, (1976)

[8]

Gass P A, Sambles J R., Accurate design of a noncollinear acousto-optic tunable filter, Optics Letters, 16, 6, pp. 429-431, (1991)

[9]

Voloshinov V B, Molchanov V Y, Mosquera J C., Spectral and polarization analysis of optical images by means of acoustooptics, Optics & Laser Technology, 28, 2, pp. 119-127, (1996)

[10]

Voloshinov V B, Mosquera J C., Wide-aperture acousto-optic interaction in birefringent crystals, Optics & Spectroscopy, 101, 4, pp. 635-641, (2006)

← 1 2 3 →