Plan of the Article 1. Prologue 2. Interference of Two Light Waves 2.1 the Case of Two Monochromatic Waves 2.2 the Case of Quasi-monochromatic Waves
Plan of the Article 1. Prologue 2. Interference of Two Light Waves 2.1 the Case of Two Monochromatic Waves 2.2 the Case of Quasi-monochromatic Waves
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发表时间：
1999
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通讯作者：
S. Saha
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作者：
S. Saha
给出了光域干涉测量的基本数学处理方法。文中详细介绍了它在单孔天文观测和稀疏孔径天文观测中的应用。我们还描述了在地球大气层存在的情况下这种技术的缺点。给出了大气湍流及其对来自恒星源的平面波前的影响的简要描述。定义了作为信息载体的散斑的形成。给出了用位相调制屏进行的实验室实验，以及由点源引起的光强分布。描述了冻结散斑的实验方法，以及傅里叶模数和傅里叶位相的数据处理技术。文中还讨论了在望远镜的光瞳平面上利用非冗余孔径模板合成孔径的技术，并着重与散斑干涉法进行了比较。文中还讨论了图像恢复的各种方法及其比较。最后，我们谈到了某些天体物理问题，这些问题可以用位于瓦努巴普天文台的2.34米瓦努巴普望远镜(VBT)新开发的散斑干涉仪来解决
We have presented the basic mathematical treatment of interferom-etry in the optical domain. Its applications in astronomical observations using both the single aperture, as well as the diluted apertures are described in detail. We have also described about the shortcomings of this technique in the presence of Earth's atmosphere. A short descriptions of the atmospheric turbulence and its effect on the flat wavefront from a stellar source is given. The formation of speckle which acts as carrier of information is defined. Laboratory experiments with phase modulation screens, as well as the resultant intensity distributions due to point source are demonstrated. The experimental method to freeze the speckles, as well as data processing techniques for both Fourier modulus and Fourier phase are described. We have also discussed the technique of the aperture synthesis using non-redundant aperture masks at the pupil plane of the telescope, emphasizing set on the comparison with speckle interferome-try. The various methods of image restoration and their comparisons are also discussed. Finally, we have touched upon certain astrophysical problems which can be tackled with the newly developed speckle interferometer using the 2.34 meter Vainu Bappu Telescope (VBT), situated at the Vainu Bappu Observatory