臺灣博碩士論文加值系統

本文研究點繞射干涉術及其運用於流場的偵測。在點繞射干涉術運用
於流場偵測時，空間濾波器扮演著非常重要的角色。因此本研究在第一部
份著重於空間濾波器的製作和評鑑空間濾波器對點繞射干涉系統的影響；
在第二部份著重於干涉條紋的分析，將流場的溫度變化量化；在第三部份
討論光路安排與視窗對點繞射干涉系統在運用上的影響。 本研究將吾
人所製作的空間濾波器應用於二維與軸對稱流場的偵測，與傳統全像干涉
術的結果做比較，顯示點繞射干涉術具有和傳統全像干涉術相同的偵測能
力，證實點繞射干涉術應用在氣動力學方面的研究有很大的潛力。

This thesis is concerned on the point diffractive
interferometry and its applications to diagnotics of thermal
Flowfield. The spatial filter plays an important role in the
point diffractive interferometry when it*s applied to flowfield
diagnotics. Included in this paper are three parts , firstly,
design of manufacture of spatial filters and the evaluation of
its effect on point diffractive interferometry were
investigated. Secondly, the quantitative of temperature
distribution was reconstructed by the analysis of interference
fringes . Thirdly, the effects of the optical system design and
the window quality on the technique were discussed. In this
experiment , a 2-D and an axis-symmetric flowfield were measured
by using the P.D.I. technique. Comparing the P.D.I. results
with the traditional holography interferometry results , shows
that the point diffractive interferometry has the same
measurement accuracy as the holography interferometry. It
concluded that the point diffractive interferometry has a great
potential for gas dynamics research.