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Modern optical theory , optical transfer function has become an important indicator for the evaluation of image quality . This indicator is an objective , accurate , and quantitative analysis , than the more advanced in the early identification rate tests and star point inspection . Today, with the rapid development of computer programming technology and high-precision photoelectric detection devices increasingly improved , calculation and measurement of the optical transfer function is maturing , has been widely used in optical design , processing , testing , and information processing . Research are based on actual projects , combined with the theory and technology of digital image processing , in-depth study by the modulation transfer function of mathematical theory and detection theory , in order to achieve the image quality of optical imaging lens optical transfer function tester An apparatus for accurate detection . The main content of the paper is as follows : First, the paper outlines the development of the Modern Fourier optics theory , including the proposed background and history of the development of the optical transfer function theory . A brief description of the level of development of today's optical transfer function at home and abroad , and pointed out the direction of the development of the testing techniques . Research background and significance of the paper work . Secondly , the paper described a general evaluation of image quality , and a brief description of the optical transfer function as the characteristics of the evaluation . On this basis , a detailed analysis of the optical transfer function representation and evaluation methods . Based on the principle of the measurement method of the digital Fourier analysis , analysis using fast Fourier transform of the image processing of the advantages , a brief derivation the fast Fourier transform process is proposed using a butterfly algorithm approach . The basis of the above , the paper gives the structures required by the test system hardware architecture , the preparation of the application . The code of the algorithm . The stability of the test system , the causes of errors and solutions through a series of tests conducted on the lens sample , do the analysis and discussion . Finally, a summary of the full text of the work done by proposed to be improved , as well as deficiencies in the work , and the prospect of future work .
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