本文關(guān)鍵詞：非對(duì)稱光斑照明合成孔徑激光雷達(dá)寬測(cè)繪帶成像研究，由筆耕文化傳播整理發(fā)布。

摘要

合成孔徑激光雷達(dá)（SAL）能實(shí)現(xiàn)遠(yuǎn)距離目標(biāo)的高分辨成像，但是，其測(cè)繪帶寬一般很小，不利于其在對(duì)地觀測(cè)中的應(yīng)用。針對(duì)這一問題，給出了寬測(cè)繪帶SAL 實(shí)際成像范圍的建議，具體研究了采用方位向短、距離向長(zhǎng)的非對(duì)稱光斑照明實(shí)現(xiàn)寬測(cè)繪帶SAL 的成像處理問題。采用波動(dòng)光學(xué)衍射理論，給出了這種寬測(cè)繪帶SAL 的詳細(xì)成像理論描述和數(shù)學(xué)仿真成像演示。結(jié)果表明，由于光學(xué)的短波長(zhǎng)特性，，非對(duì)稱光斑照明的寬測(cè)繪帶SAL 也近似遵循基本SAL圖像形成方法：傅里葉變換實(shí)現(xiàn)距離壓縮，匹配濾波實(shí)現(xiàn)方位圖像聚焦。

關(guān)鍵詞

Abstract

Synthetic aperture ladar (SAL) can achieve long distance objects high resolutions imaging. However, the mapping bandwidth is generally small, which probably limits its applications in land surveillance. In order to solve the problem, practical imaging range of a wide swath SAL is suggested and a wide swath SAL using non-symmetric beam-pattern illumination with short azimuth size and long range size is investigated in detail. By wave optics diffraction theory, detailed theoretical descriptions of the image formation theory on the wide swath SAL as well as the mathematical simulations are given. The results show that due to the characteristic of short optical wavelength, the conventional image formation theory used in SAL data processing is approximately applied in wide swath SAL using non- symmetric beam- pattern illumination, that is, range compression by Fourier transformation and azimuth image focusing by matched filtering.

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補(bǔ)充資料

中圖分類號(hào)：TN958

DOI：10.3788/aos201535.0328003

所屬欄目：遙感與傳感器

基金項(xiàng)目：國家自然科學(xué)基金（61178071）

收稿日期：2014-09-24

修改稿日期：2014-11-12

網(wǎng)絡(luò)出版日期：--

作者單位    點(diǎn)擊查看

吳謹(jǐn)：中國科學(xué)院電子學(xué)研究所, 北京 100190
趙志龍：中國科學(xué)院電子學(xué)研究所, 北京 100190中國科學(xué)院大學(xué), 北京 100049
段洪成：中國科學(xué)院電子學(xué)研究所, 北京 100190中國科學(xué)院大學(xué), 北京 100049
吳曙東：中國科學(xué)院電子學(xué)研究所, 北京 100190中國科學(xué)院大學(xué), 北京 100049
黃文武：中國科學(xué)院電子學(xué)研究所, 北京 100190

聯(lián)系人作者：吳謹(jǐn)(jwu909@263.net)

備注：吳謹(jǐn)（1965—），男，博士，研究員，主要從事脈沖氣體激光器及激光雷達(dá)等方面的研究。

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引用該論文

Wu Jin,Zhao Zhilong,Duan Hongcheng,Wu Shudong,Huang Wenwu. Investigation on Image Formation of Wide Swath Synthetic Aperture Ladar Using Non-Symmetric Beam-Pattern Illumination[J]. Acta Optica Sinica, 2015, 35(3): 0328003

吳謹(jǐn),趙志龍,段洪成,吳曙東,黃文武. 非對(duì)稱光斑照明合成孔徑激光雷達(dá)寬測(cè)繪帶成像研究[J]. 光學(xué)學(xué)報(bào), 2015, 35(3): 0328003

  本文關(guān)鍵詞：非對(duì)稱光斑照明合成孔徑激光雷達(dá)寬測(cè)繪帶成像研究，由筆耕文化傳播整理發(fā)布。