光学综合孔径成像机理的研究-光学专业论文.docxVIP

北京工业大学硕士学位论文Abstract 北京工业大学硕士学位论文 Abstract Optical aperture synthesis imaging，including optical interferometry and sparse aperture imaging systems，is an effective means to obtain high resolution images．It is necessary to make a special study on their mechanism． The principles of traditional single circle aperture，ideal optical interferometry and sparse aperture imaging systems are derived from a general incoherent imaging model． Then，the spatial resolution of each system is presented． By comparing the model of practical optical interferometry with ideal one，a modulate factor is found．The e￡陌c￡of this modulate factor can be thought as one under a reasonably proximate premise．Then the limitation on the field—of-view of practical optical interferometry is obtained． It is verified that，using a few baselines，simple oNects can be restored to a clear image by optical interferometry,but as far as complex objects is concerned，even the more baselines are used，the clear image can not bc captured． The average value of the modulate transfer function(MTF)is presented in a simple way． Then the relationship among signal·to-noise ratio，fill factor of sparse aperture and integration time of imaging is analyzed． By designing the configurations of different sparse aperture models，such as Annulus， Tri—Arm，Rotation Tri-Arm and Golay 6，their optical transfer functions arc analyzed． The fill factor versus sub·aperture numbers and sparse aperture diameter versus sub· aperture diameter are analyzed under the condition of small fill factor． Key Words：aperture syntheses；optical interferometry；sparse aperture；field-of-view； configuration；signal—tO-noise ratio；MTF 1I 独创性声明本人声明所呈交的论文是我个人在导师指导下进行的研究工作及取得的研 独创性声明 本人声明所呈交的论文是我个人在导师指导下进行的研究工作及取得的研 究成果。尽我所知，除了文中特别加以标注和致谢的地方外，论文中不包含其他 人已经发表或撰写过的研究成果，也不包含为获得北京工业大学或其它教育机构 的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均 已在论文中作了明确的说明并表示了谢意。 签名： 铱殛送 日期：卫生。吐，!f 关于论文使用授权的说明 本人完全了解北京工业大学有关保留、使用学位论文的规定，即：学校有权 保留送交论文的复印件，允许论文被查阅和借阅；学校可以公布论文的全都或部 分内容，可以采用影印、缩印或其他复制手段保存论文。 (保