光子学报
光子學報
광자학보
ACTA PHOTONICA SINICA
2010年
2期
260-265
,共6页
王海涛%蔡佳慧%魏鹏%张雅静%朱永凯%田贵云
王海濤%蔡佳慧%魏鵬%張雅靜%硃永凱%田貴雲
왕해도%채가혜%위붕%장아정%주영개%전귀운
光学综合孔径%相干成像%点扩展函数%u-v覆盖
光學綜閤孔徑%相榦成像%點擴展函數%u-v覆蓋
광학종합공경%상간성상%점확전함수%u-v복개
Optical synthetic aperture%Interferometric imaging%Point spread function%u-v coverage
介绍了即时/准即时u-v覆盖的光学综合孔径成像技术实时/准实时观测的优点,并以LBT为实例进行了成像分析.对LBT采用快速傅里叶变换、卷积与反卷积算法获得系统的点扩展函数(PSF)与光学传递函数(OTF);探讨了全局传递函数及其对成像效果的影响,说明了即时/准即时u-v覆盖成像特性;用实验仿真的方法验证了全局传递函数在满足准即时u-v覆盖成像的要求情况下能够对天体目标进行较好的图像恢复.
介紹瞭即時/準即時u-v覆蓋的光學綜閤孔徑成像技術實時/準實時觀測的優點,併以LBT為實例進行瞭成像分析.對LBT採用快速傅裏葉變換、捲積與反捲積算法穫得繫統的點擴展函數(PSF)與光學傳遞函數(OTF);探討瞭全跼傳遞函數及其對成像效果的影響,說明瞭即時/準即時u-v覆蓋成像特性;用實驗倣真的方法驗證瞭全跼傳遞函數在滿足準即時u-v覆蓋成像的要求情況下能夠對天體目標進行較好的圖像恢複.
개소료즉시/준즉시u-v복개적광학종합공경성상기술실시/준실시관측적우점,병이LBT위실례진행료성상분석.대LBT채용쾌속부리협변환、권적여반권적산법획득계통적점확전함수(PSF)여광학전체함수(OTF);탐토료전국전체함수급기대성상효과적영향,설명료즉시/준즉시u-v복개성상특성;용실험방진적방법험증료전국전체함수재만족준즉시u-v복개성상적요구정황하능구대천체목표진행교호적도상회복.
The indispensable information regarding the image reconstruction is derived immediately/para-immediately by the optical synthetic aperture imaging with the immediate/para-immediate u-v coverage with the samples taking from the space frequency domain.The image of the observed object is obtained.The advantages of the immediate/para-immediate observation using the optical synthetic aperture imaging technology with the immediate/para-immediate u-v coverage are introduced.The analysis of imaging for LBT is proceeded as an example.It deduces the point-spread function and optical transfer function of the LBT system based on the algorithm of the Fast Fourier Transform (FFT),convolution and deconvolution.It also discusses the global transform function and its influence on the effect of imaging.It explains the imaging properties of the immediate/para-immediate u-v coverage.With the means of the experimental simulation,it tests and verifies that the global transform function could restore the image of celestial body under the circumstance which fits the condition of the imaging of the para-immediate u-v coverage.